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Cng ho x hi ch ngha Vit NamCng ho x hi ch ngha Vit NamCng ho x hi ch ngha Vit NamCng ho x hi ch ngha Vit Namc lpc lpc lpc lp ---- T doT doT doT do ---- Hnh phcHnh phcHnh phcHnh phc

--------------------------------------------------------------------------------

Tiu chun NgnhTiu chun NgnhTiu chun NgnhTiu chun Ngnh

Cu v cngCu v cngCu v cngCu v cngQuy phm thi cng v nghim thuQuy phm thi cng v nghim thuQuy phm thi cng v nghim thuQuy phm thi cng v nghim thu

22TCN 26622TCN 26622TCN 26622TCN 266 ---- 2000200020002000****************************************************

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C quan bin son:C quan bin son:C quan bin son:C quan bin son:Tiu ban k thut xTiu ban k thut xTiu ban k thut xTiu ban k thut xy dng cng trnh giaoy dng cng trnh giaoy dng cng trnh giaoy dng cng trnh giaothngthngthngthng

Ch tr bin son: KS. Phan Xun iKS. Phan Xun iKS. Phan Xun iKS. Phan Xun i

C Quan trnh ban hnh:C Quan trnh ban hnh:C Quan trnh ban hnh:C Quan trnh ban hnh:V Khoa hc cng nghV Khoa hc cng nghV Khoa hc cng nghV Khoa hc cng ngh ---- B Giao thng vnB Giao thng vnB Giao thng vnB Giao thng vn

titititi

V trng: Ths. Hu TrThs. Hu TrThs. Hu TrThs. Hu Tr

C quan xt duyt v ban hnh:C quan xt duyt v ban hnh:C quan xt duyt v ban hnh:C quan xt duyt v ban hnh:B Giao thng vn tiB Giao thng vn tiB Giao thng vn tiB Giao thng vn tiTh trng: KS. Phm QuangKS. Phm QuangKS. Phm QuangKS. Phm Quang TuynTuynTuynTuyn

Quyt nh ban hnh s /2000/QQuyt nh ban hnh s /2000/QQuyt nh ban hnh s /2000/QQuyt nh ban hnh s /2000/Q----GTVT,GTVT,GTVT,GTVT,ngy thng nm 2000 ngy thng nm 2000 ngy thng nm 2000 ngy thng nm 2000

Tiu chun ngnhTiu chun ngnhTiu chun ngnhTiu chun ngnhNhm HNhm HNhm HNhm H

Cng ho x hiCng ho x hiCng ho x hiCng ho x hich ngha Vit Namch ngha Vit Namch ngha Vit Namch ngha Vit Nam

Cu v cngCu v cngCu v cngCu v cngQuy phm thi cngQuy phm thi cngQuy phm thi cngQuy phm thi cng

v nghim thuv nghim thuv nghim thuv nghim thu

22TCN 26622TCN 26622TCN 26622TCN 266 ----2000200020002000

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B Giao thngvn tiB Giao thngvn tiB Giao thngvn tiB Giao thngvn ti C hiu lcC hiu lcC hiu lcC hiu lc t 09 / 9/ 2000t 09 / 9/ 2000t 09 / 9/ 2000t 09 / 9/ 2000

Ban hnh km theo quyt nh s: 2453 /2000/Q-BGTVT, ngy 24 / 8 /2000. Thay th Quytrnh thi cng v nghim thu cu cng ban hnh km theo Quyt nh s 166/Q nm 1975.

1. Cc quy nh chung1. Cc quy nh chung1. Cc quy nh chung1. Cc quy nh chung

1.1. Cc yu cu ca quy phm ny phi c thi hnh i vi tt c cc t chc tvn thit k, t vn gim st v cc nh thu khi thi cng v nghim thu cc cu cng xydng mi vnh cu hoc ci to (trong bao gm ng ng, mng nc, cu tu bncng, cu vt cn, cu dnh cho ngi i b) thuc ng st, ng tu in, ng t (gm c ng ni b ca cc x nghip v t chc nng nghip, ng ca cc xnghip cng nghip) trong v ngoi th, nu nh n bn v thi cng khng quy nhcc yu cu khc. Nhng hng mc thi cng v nghim thu khng c quy nh trongquy phm ny, phi thc hin theo ng ch dn ca n BVTC.

1.2 Khi thi cng cu v cng, ngoi cc yu cu ca quy phm ny, phi tun thcc yu cu trong danh mc cc tiu chun nh nc, tiu chun ngnh v cc tiu chunkhc c lin quan, trong bao gm c v an ton k thut, v sinh cng nghip v phngchy, nu trong ph lc 2.

1.3. Nhng qui nh ca quy phm ny da trn mt s tiu chun, qui phm hinhnh ca Nh nc. Khi c khc bit gia qui phm ny v tiu chun, qui trnh lin quankhc v vic thi cng v nghim thu cu cng th phi tun theo quy phm ny.

1.4. Khi xy dng cc cng trnh cu v cng phi thc hin cc gii php thit k,bo v mi trng sinh thi theo qui nh hin hnh.

Cc gii php k thut c p dng phi ph hp tiu chun v sinh cng nghipv khng cho php gy bn nc mt v nc ngm, khng c lm ly li khu vc cngtrng, khng c sn sinh ra cc cht c hi cng nh khng cho php a cc chtthi khc ra ngoi tri gy nhim mi trng.

Nghim cm vic cht ph rng hoc cy ci vng ph cn cng trng xy dng:khng rc thi hoc vt liu xy dng ln mt t khu vc xy dng lm suy thoithm thc vt cng nh vic tho nc ra ngoi sao cho khng lm thay i mc ncngm sn c.

Trc khi bn giao tr li mt bng cng trng bc vo khai thc cng trnh,phi tin hnh tho d cc nh tm ln tri v cc cng trnh ph tr, thu dn sch vt liuv cc cu kin cn tha, sa sang li mt bng, cng nh phi thu dn thanh thi lngsng di cu v khi thng cc l thot nc trong cng.

1.5. Vic xy dng cc cu ln v cu va phc tp th nht thit phi do cc nhthu xy dng cu nng lc m nhn.

1.6. Vic xy dng cu v cng phi thc hin u tin bng phng php cngnghip do ng dng cc kt cu v chi tit lp ghp.

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Vic t chc thi cng phi to iu kin sao cho t nng sut lao ng cao, mbo c th bn giao cc cng trnh xy dng t tin nh, cng nh bo m chtlng thi cng cao v gi thnh r nht.

1.7. Trnh t thi cng v thi gian hon thnh cc cng tc xy dng v lp rpphi c quy nh bng biu tin . Cc biu tin ny phi th hin c ccdy chuyn sn xut v s kt hp cc mi thi cng khc nhau.

Cng tc xy dng phi c tin hnh u n trong c nm. Mun vy ti cngtrnh phi to ra cc khi lng d tr, khin cho cng tc trong ma kh v ma ma tinhnh bnh thng, khng phi tng cng nhn lc v nng cao gi thnh ln nhiu.

1.8. V cn bn, cc b phn ca kt cu lp ghp phi c ch to sn trongxng my chuyn nghip. Khi no khng th ch to cc kt cu ti xng mychuyn nghip hoc khi vic chuyn ch cu kin ti cng trnh khng li v mt kinh tth n v thi cng phi lp bi ch to ring gn vi quy m v s lng, chng loithit b do khi lng cng tc quyt nh.

1.9. n v thi cng phi hn ch s lng cng trnh tm trong cng trng timc ti thiu v phi u tin dng cc kt cu tho lp vn nng, cc kt cu c th lunchuyn c lm cc cng trnh tm .

1.10. Cc cng tc xy dng v lp rp cn c c gii ho ti mc ti a v ivi cc hng mc cng tc ln phi ng dng phng php c gii ho ton b.

1.11. Cc vt liu xy dng v cc kt cu, c bit i vi loi c khi lng ln,phi a thng ti cc kho ti cng trng, khng qua chuyn ti. Cc kho ti cng trngphi c b tr vng hot ng ca cc thit b cn trc v phng tin vn ti phc vcng trng .

Nu vt liu xydng ch yu ca cng trnh l b-tng, phi lp phng thnghim vt liu ngay ti cng trng.

1.12. Cc gii php thi cng, trnh t v thi hn thi cng c xc nh trn c sxt tnh n chu k v mc nc hng nm, cng va p ca sng, xi l lng sng,s va p ca vt tri, cy tri v.v...

Khi xy dng cu vt qua sng c dng chy mnh hoc c tu thuyn qua li,phi tun theo cc quy nh v m bo an ton giao thng ng thu ni a, cng nhm bo hot ng ca tu thuyn nh bt c, to iu kin thun li cho vic di chuynn c.

Khi trin khai xy dng cc cng trnh v thit b ph tm thi cng trn mt sngc p bao, phi m bo n nh tuyt i cho trong khu vc lm cu v phi tun

theo cc quy nh v bo v iu.

1.13. Khi chun b vt liu ti ch (, ct , g xy dng) ti chn cng trnh, phikim tra nghim ngt v cht lng v c tnh ca vt liu theo tng l khi lng, phixem xt yu cu c th cho tng loi vt liu thch hp.

1.14. Sau khi bn giao cu v cng cho c quan khai thc qun l, nh thu xydng phi c trch nhim quan st tnh trng k thut ca cng trnh v kim tra v tr cc

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b phn kt cu theo mt bng v mt ct dc trong thi gian bo hnh, c bit l sauma nc l.

Nh thu phi quan st k cc cng v kim tra v tr tng t cng sau 2 - 3 thnglp t xong di t.

Kt qu ca cc cuc kim tra phi c ghi r vo vn bn lu tr theo di.

1.15.Vic cht ti ln cc b phn cu c hon chnh theo n, ch chophp sau khi kim tra v lp bin bn nghim thu cng on . Trnh t ch dn vcht ti phi c ch cng trnh chp thun.

1.16. Khi b tr cng trng xy dng, iu ng kt cu cng trnh ph tm vmy thit b thi cng, phi m bo an ton vi mc nc l xut hin trong sut thi gianthi cng; c th chn mc nc cao tng ng vi lu lng tnh ton dng chy c tnsut 10%.

Nu c c s v iu kin k thut - kinh t thch hp, cho php ly mc nc thicng tng ng vi lu lng tnh tan c tn sut 50%.

2. Cng tc o c nh v2. Cng tc o c nh v2. Cng tc o c nh v2. Cng tc o c nh v

2.1. thc hin d n xy dng cu (cng), cn phi lp mng li o c sau:a) Mng li tam gic c, a gic c hoc ng sn - tam gic (i vi cu

di trn 300m, cu treo dy xin, cu trn ng cong hoc cu c tr cao hn 15m).b) Chi dn mc (trng hp a hnh phc tp, cc im o ca mng li

khng nhn r nhau c th trn tim ca im o cn phi lp chi dn mc c caocn thit).

c) Cc im o dc theo tim cu (i vi cng l im giao ca tim cng v timng)

d) Cc im o dc theo trc tim ph song song vi trc tim chnh ca cu, trong

trng hp xy dng cu vt qua bi sng c di hn 100m, khi xy dng cu trongcc iu kin phc tp (an xen vi cc kin trc sn c hoc bo tn thin nhin) vtrong trng hp cc im o c th b h hng trong qu trnh thi cng cu.

e) Cc im o tim ng vo cu, trong trng hp phn ng vo cu cngnm trong khi lng thi cng ca d n cu.

f) Cc im o tim tr trn bi sng ca cu c chiu di hn 100m, cu treo dyxin, cu trn ng cong hoc cu c tr cao hn 15m.

2.2. Vic lp mng li o c phi c xt thch hp sao cho t cc im o cth xc nh c tim tr v kim tra v tr kt cu trong qu trnh thi cng.

Nu tim cu ct qua mt khu t cao, nht thit phi lp thm t nht mt im oph trong mng li o c nh v tim cu v mt chi dn mc.

Nu tim cu nm trn ng cong, cn bm st theo hng ca dy cung xcnh im u v im cui cu. Trong trng hp b tr on cu vt sng nm trnng thng, cn on cu dn nm trn ng cong, khi on cong chuyn tip cacu bm st theo ng tang.

2.3. i vi cc cu c chiu di trn 300m, cc cu treo dy xin, cu trn ngcong cng nh cu c tr cao hn 15m, cn phi lp bn v thit k mng li o c

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(ML) nh v kt cu v kim tra thi cng cu; bn v c lp trong h s thit k tchc xy dng cu.

i vi cc cu cn li v cng, cng tc o c bao gm vic lp s v trim o nh v kt cu v xc nh c ly, cng nh nhng yu cu v chnh xctng ng vi my - thit b kim tra trong qu trnh xy lp, phi c xem xt trong n bn v thi cng (BVTC).

2.4. Trong bn v thit k ML, cn nu thm nhng yu cu phc v thit kt chc xy dng (TCXD) v thit k BVTC nh sau:

Giai on chun b xy dng: s b tr cc im o v biu tin hnh cngtc o c .

Giai on thc hin xy dng: cc d kin v chnh xc v phng php thitlp mng li o c cu, s b tr v xc nh im o trong mng li; dng cctiu, cc mc; cc d kin v chnh xc, phng php, my - thit b o v trnh ttrin khai chi tit cng vic o c, s o kim tra v thc hin php o; biu tinhnh cng tc o c.

Giai on kt thc xy dng, a cng trnh vo khai thc s dng: theo di

quan st s chuyn v v bin dng ca cng trnh, phi c cc d liu v chnh xc,phng php, my - thit b o v trnh t theo di chuyn v - bin dng ti hin trng;s mng li o c, cc d kin v chnh xc ca cc php o kt cu, dng cctiu cc mc; biu tin hnh cng vic o c.

Trong bn v thit k ML, cng cn ch r my o v cc php o chun.

2.5.Ton b bn v thit k ML do t chc t vn thit k lp phi c chuyngiao bng vn bn cho bn nh thu tip nhn cng tc o c v nh v kt cu cngtrnh.

Bin bn nghim thu ML phi c s ho mt bng v tr cc tiu cc mc khuvc lm cu, dng v su chn cc, to cc, k hiu v cao mc trong h thngto v cao trnh nh nc.

i vi cc cu c chiu di trn 300m, cc cu treo dy xin, cu trn ngcong, cng nh cu c tr cao hn 15m, trong bin bn nghim thu ML c bn v mtbng khu vc cng trnh, trong c v tr v cao trnh cc tiu cc mc, km theo nhngch dn cn thit thc hin cng tc o c.

2.6. Cng tc o c nh v trong qu trnh t chc xy dng cu v cng, vicphn nh tim ng nhnh tm thi, vic lp thm (nu cn) mng ng sn cho cungn hn 300m hoc cu vt qua dng chy c b rng nh hn 100m, cng nh micng vic kim tra o c khi tin hnh xy lp, u phi do nh thu thc hin. Nhngd kin v to cc tiu cc mc trong ML phi do ch cng trnh cung cp.

2.7. Khi tin hnh t chc xy dng cu, cn kim tra cng tc o c theo cccng on sau:

a) Trc khi lm cu, tun th cc quy nh ca iu 2.5.b) Sau khi lm xong phn mng m tr (trc khi bt u xy thn m tr).c) Sau khi xy m tr cu (sau khi lm xong phn mng m tr)d) Thc hin cc bn v thit k ML trong qu trnh xy thn m tre) Sau khi xy xong m tr v nh tim dm trn mt k gif) Sau khi lp t kt cu nhp vo v tr gi .

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2.8. Nhng yu cu k thut, khi lng v phng php cng tc o c c chdn trong bng 1.

Bng 1Bng 1Bng 1Bng 1

Yu cu k thutYu cu k thutYu cu k thutYu cu k thut i tng kim trai tng kim trai tng kim trai tng kim tra Phng php hocPhng php hocPhng php hocPhng php hoccch thc kim tracch thc kim tracch thc kim tracch thc kim tra

1. S lng cc tiu - cc mc trongmng li o c i vi cu di trn300m, cu treo dy xin, cu trn ngcong, cu c tr cao hn 15m, cng nhcu vt qua dng chy c b rng mtthong trn 100m, thc hin theo bn vthit k ML.

Tng cc Dng trc c (tinhnh o khi nghim

thu ML)

2. S lng cc mc v cc tiu trnmt bng mng li o c dc theo tim

cu c quy nh:+ i vi cng v cu c chiu di nh

hn 50m n 300m, 1 mc cao c vkhng t hn 2 cc tiu mi bn b.

Tng cc mc vcc tiu

Dng trc c (tinhnh o khi nghim

thu ML)+ i vi cu di trn 300m, cu treo

dy xin, cu trn ng cong v cu ctr cao hn 15m: 2 cc mc v khng thn 2 cc tiu mi bn b.

nt nt

3. Sai s qun phng (mm) qui nh:+ to cc cc theo mt bng mng

o c s, l 6

Ton b cc tiutrn mt bng o

Dng trc c (tinhnh o theo mt

bng phng).

+ cc mc cao c trn b v trnmt m tr: mc lu di l 3, mc tm thil 5.

Ton b cc mc Dng trc c (ocao trnh theo hnhhc hoc lng gic,dng my ton c

in t.

Ghi ch:Ghi ch:Ghi ch:Ghi ch:1. Trn cc cu di hn 100m, cu treo dy xin, cu trn ng cong v cu c

tr cao hn 15m, cc cc tiu cc mc ca ng sn c bn u bng BTCT, trn mtcc c gn im tim m bo mng li o chun xc. Trn cc cu khc cn li, cccng v ng vo cu cho php s dng cc g c u inh thp lm ng sn cbn.

2. Khi ng vo cu nm trn ng cong, cn phi xc nh: im u v imcui ca ng cong, im phn gic v nh ng cong.

3. Mc cao c c b tr cch ng tim cng trnh khng qu 80m, nhngphi nm ngoi phm vi nn p, thng u, rnh thot nc,v.v...

4. quan st chuyn v v bin dng ca cc m tr cu (i vi cng trnh cghi trong bn v thit k ML), cn phi nh du c nh im o trn mt bn mthp gi cu thng h lu hoc gn cc s c u hnh chm cu (trng men) ln nhm tr v tr thun tin t thc o ngm.

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2.9.Khi xc nh khong cch gia cc mc nh v tim cu v cc tr bngphng php trc c th mng li a gic cn phi p ng cc yu cu sau y:

1. Tu theo iu kin a hnhchn dng ca mng li cn c (hnh 1)nh sau:

i vi cc cu ln dng mngli a gic c, khi c bi ni gia sngth dng mng li trung tm.

i vi cu va, dng mng lica 2 hoc 4 tam gic.

2. Gc ca hnh tam gic khngc nh hn 250v khng ln hn 1300cn trong a gic c th khng nh hn200.

3.Mng li chung phi bao gmt nht l hai im c bn nh v tim

cu, mi bn b c mt im, ngoi racn phi bao gm tt c cc im m t c th nh im tm cc tr bngcch giao tuyn thng v c th tin hnhkim tra trong qu trnh thi cng.

Trong trng hp ny giao nhaugia hng ngm v tim cu cng gn900 cng tt, cn chiu di tuyn ngm(t my o ti tr) khng c ln hn:

1000m khi nh im bng mykinh v c chnh xc v s c l 1giy.



S lng giao im bn snkhng c t hn hai im

4. Cc im ca mng li tamgic cn phi c ng bng cc cnh. Trong hon cnh a hnh phc tp,

nu di t khng nhn r nhau cth trn tm ca im o cn phi dngchi dn mc c cao cn thit(hnh2).

Hnh 1:Hnh 1:Hnh 1:Hnh 1:Cc dng ca mng li

Hnh 2:Hnh 2:Hnh 2:Hnh 2:Chi dn mc v cc chi tit cachi

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Trc mi ln ngm my phi dn tim ca mc ln ca my ngm. Nu khngth dn tim ca mc ln ca my ngm th cn xc nh cc yu t quay v tm v ichnh cho thch hp.

5. Trong trng hp chiu di cu di 200m th trong mng li tam gic cho phpo bng 1 c tuyn, cn nu chiu di ln hn th t nht phi o bng 2 c tuyn. Trong

trng hp sau, cc c tuyn c cm mt bn b thng lu v h lu cu hoc haibn b mi bn mt c tuyn. C tuyn phi c cm trn ch t phng c dc nhhn 1%. Trong trng hp c bit cho php cm mt mng li c tuyn c lp.

2.10. Chiu di ca c tuyn phi o vi chnh xc quy nh bng 2 v chnhxc gp 2 ln so vi khi o khong cch gia cc mc nh v tim cu. Trong bng 2 cng ra chnh xc cn thit khi o gc v khp cho php i vi mi tam gic ca mngli trc c. Ngoi ra trong cng ra cc dng c cn dng o.

Bng 2Bng 2Bng 2Bng 2Yu cu v chnh xc khi o c tuyn gc

v cc dng c cn thit.Chiu diChiu diChiu diChiu di

ca cuca cuca cuca cu (m) chnh chnh chnh chnhxc cnxc cnxc cnxc cnthit khithit khithit khithit khi

oooo

chnh chnh chnh chnhxc cnxc cnxc cnxc cnthit khithit khithit khithit khio gco gco gco gc(giy)

khp khp khp khpcho phpcho phpcho phpcho phptrong cctrong cctrong cctrong cc

mngmngmngmng(giy)

Cc dng c cn dng o v s lnCc dng c cn dng o v s lnCc dng c cn dng o v s lnCc dng c cn dng o v s lnkhi o gckhi o gckhi o gckhi o gc

- Nh hn100

- T 100n 300

- T 300n 1000

- Ln hn1000

1/10.000

1/30.000

1/50.000

1/80.000

20

7

3

1,5

35

10

5

2

-Thc thp hoc thc cun. myton c 30 vi 2 ln quay vng.

- Thc o hoc thc cun c khcly my ton c 10 vi 3 ln quayvng .

- Thc o thp hoc my o quangin, my ton c 1 vi 3 ln quayvng.

- My o quang in, my ton c1 vi 5 ln quay vng.

2.11.Vic nh cc tim tr cu trn mt ng thng cn tin hnh bng phngphp giao im vi gc vung t nht l t 2 im ca h thng a gic c v t cc timtr trn ng tim cu vi lch cho php ln nht l 15mm. Vic nh v cc b phnca tr sau ny cn tin hnh t cc tim ca tr bng cch gin n, u tin l bng phngphp ta vung gc.

Trong qu trnh xy dng cn phi thng xuyn kim tra v tr ca tim tr.

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2.12.Trong qu trnh xy dng mng v thn tr cu cn phi t trc nhng mccao c ph ngay ti nh tr, mc thp v mc cao nhanh chng xc nh c cccao im cn thit cho vic xy dng tr hoc lp rp dm cu .

t cc mc cao c ph phi i cao c 2 ln t nhng mc chun vi sai s caoc nhiu nht l 15mm.

2.13. Ti cu di trn 200m phi t:a) Trn thnh ca mi m: mc cao c theo mu quy nh.Gia cc mc vi

nhau v vi cc mc chun phi i cao c t nht l 3 ln, vi sai s bnh qun 10mm.b) Trn cc m tr: mc cao c cc ni thun tin cho vic t thc ngmTrn cc tr sa cha li m trc y quan st thy c bin dng hoc ti cc tr

lm mi trong iu kin a cht phc tp, phi trong cc hm kn, mi tr 2 ng thubnh t vung gc vi nhau. Mi ng thu bnh ny c khc kim tra nh hn 20 giy.Trc khi bn giao cho s dng, nh thu thi cng phi tin hnh cho xong vic kho st ln v bin dng bng mc cao c v bng ng thu bnh.

2.14.Khi sa cha cc cu sn c v khi phc cc cu b h hng phi xc nh

trng thi v v tr ng tim dc, ngang ca cc tr b ph hoi v kim tra khong cchgia cc tim tr, i chiu vi cc s liu thit k .

2.15.Tt c cc s liu o c c u phi ghi vo cc s cng tc hin trngtheo mu quy nh ring, cn mi tnh ton u ghi vo nhng biu mu hoc vit thnhvn bn r rng .

Tt c cc s cng tc hin trng, cc h s v cc s liu vn phng, trong qutrnh hon thnh, phi c kim k li, ng gi v a v phng k thut thi cng boqun.

3. Cc cng trnh v thit b ph tr3. Cc cng trnh v thit b ph tr3. Cc cng trnh v thit b ph tr3. Cc cng trnh v thit b ph tr

3.1 Cc kt cu cng trnh v thit b ph tr (CTTBPT) thi cng cu phi thc hinng cc yu cu ca tiu chun ngnh Qui trnh thit k cc cng trnh v thit b ph trthi cng cu v nhng qui nh trong phm vi ny.

3.2 Khi thi gian s dng cc kt cu bng g khng qu 5 nm, cho php khngcn n cc bin php phng chng mc mt.

3.3 Khng c cht ti trng khc ln CTTBPT m trong thit k BVTC khng quinh.

3.4 Nu b tr CTTBPT trn sng c vi phm hnh lang thng thuyn, cn phi lpt cc bin bo tn hiu v cc kt cu bo v c bit, trnh c s va chm ca tuthuyn.

3.5 Khi lm tr to nn lp t CTTBPT, cn phi c bin php sao cho phnnn pha trn mt nc.

Cng vic o t gn xung quanh tr ny cn phi tun theo ch dn ca thit kTCXD.

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3.6. Vic lp t cc tr v dm tm, nu khng c cc ch dn c bit cathit k, cn c d phng ln do pht sinh bin dng d trong cc trng hp sau:

p cc b mi mt tip gip gia g v g, l 2mm;p cc b mi mt tip gip gia g v thp l 1mm;Lp t nn m cht,d phng ln l 10mm;Lp t c ct hoc t ct, d phng ln l 5mm.

3.7. Vic to bi lp t kt cu nhp trn nn ng vo cu phi tin hnh p tdn tng lp m cht theo yu cu ca n thit k.

Mt bng p t phi m bo tiu thot nc nhanh.Trc mi t c m hoc y m v sau mi trn ma ro cn phi o li cao

trnh mt bi v khc phc cc bin dng pht sinh.

3.8. Mt trn ca ng trt ln phi st kht vi mt di ca m bin dm khi laoy sao cho khng c nhng chi tit b phn no li cm ln.

3.9. Khi lao ko kt cu nhp trn ng trt ln, khng cho php dng nhng con

ln c ng knh khc nhau v c cc khuyt tt nh mo van, cn xc, st m hocmn u. Mt ca ng ln khng c g gh, mi hn hoc cc chi tit khc li ln phic ty bng.

3.10. Tc lao ko dm trn con ln khng c vt qu 30m/h, cn trn tmtrt, khng qu 15m/h. Tc hnh trnh ca pit-tng kch y dm theo hng ngangkhng c vt qu 5mm/s.

Trc khi tin hnh lao ko dm, tt c cc vt liu thit b dng chng ko uphi c kim tra k lng v ghi vo bin bn nghim thu.

3.11. Khi thi cng c s dng h ni, phi kho st v thm d trc phm vi hot

ng ca h ni di nc m bo su nc di y h n ln hn 0,2m.3.12. H ni dng trong thi cng l cc phao thp ni ghp hoc s lan thp.Trc khi lp t h ni mi phao thp hoc s lan phi c ng kim v c ghi

vo bin bn nghim thu.

3.13. Khi di chuyn h ni bng h ti ko hm phi b tr sn cc im neo dphng v chun b sn cc thit b thay th chng buc cp ln thn h ni c d dng.

3.14. cc gc cnh ca h ni phi gn thc o vch sn r rng o mn nc trong sng. Khi cht ti trn h ni phi thng xuyn kim tra ln lch cah i chiu vi tr s thit k.

3.15. Trc khi v trong sut qu trnh s dng h ni lm vic trn mt sng, phic y thng tin v d bo thi tit thu vn trong thi gian tin hnh cng vic.

3.16. i ch huy trn h ni phi c trang b b m in t lin lc vi bphn iu khin h ti ko hm, tr ni v vi b phn iu hnh trn b.

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3.17. Khi vn hnh my cu t trn h ni phi m bo tnh n nh vng, chophp my cu hot ng thi cng khi c gi vi vn tc khng qu 10m/s v khi c sngn cp 2 (vi chiu cao sng nh hn 25cm).

3.18. i vi my cu kiu cng t hnh v my cu kiu chn d khng c ngray dn, phi m bo tr s chnh lch ca chn cu khi di chuyn khng c vt qu

1/500 chiu di cn vi ca cu.

3.19. Ct s dng trong CTTBPT thi cng cu, nu khng c yu cu c bit khcphi m bo sch, kh, ng knh ht qua mt sng t 1 n 1,2mm. Ct phi c boqun tt, khng b ng nc hoc ngm nc.

3.20. Kch dng trong thi cng cn phi m bo lm vic theo hng ng tm,vic iu chnh ch lm vic ca tng kch hoc nhm kch phi cn c vo ng h op lc; dng kch y phi c thit b hm (d phng); khi kch ta trn mt thp th philt tm m bng g, khi ta trn mt g th lt m thp phn b lc.

Khi kt cu nhp t ln mt kch phi t bn thp m gia phn b lc. trong

mi trng hp khc, phi c lp m gia bng g dn t trn mt kch.Khi kch chu lc, phi m bo trng tm ca lc ln kch trng hp vi ngtim hnh trnh ca pit-tng.

3.21. Phi lp cng v tin hnh th ti cc CTTBPT trc khi a vo s dng thi cng cu.

3.22. Trc khi a cc CTTBPT vo thi cng cu, cn phi t chc kim tra,nghim thu v lp thnh bin bn. Danh mc cc CTTBPT cn nghim thu, theo ch dn ca n BVTC.

3.23. Trng thi ca cc CTTBPT phi c kim tra theo di trong qu trnh thi

cng cu. Vic quan st v kim tra CTTBPT phi c thc hin trc khi chu ti v saukhi vn hnh trn sng nc.

3.24. Cc yu cu k thut, hng mc v phng php kim tra cc CTTBPT trongqu trnh trin khai thi cng cu, c quy nh theo bng 3.


Yu cu k thutYu cu k thutYu cu k thutYu cu k thut i tng kimi tng kimi tng kimi tng kimtratratratra

Cch thc kim traCch thc kim traCch thc kim traCch thc kim tra

1. sai lch v v tr so vi n:i vi kt cu thp, theo mt bng,

khng qu 30mm.

Tng kt cu o bng thc

i vi mi loi hnh kt cu, xin theohng thng ng khng qu 0,0025.

nt nt

i vi mng cc, qui nh theo bng 5. nt nt2. sai lch v cao trnh ca kt cu g

v kt cu thp, khng qu 50mm.nt nt

3. sai lch v ng bao hnh hc cadm v gi , khng qu +20mm v -10mm

nt o bng my thu bnh.

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4. song song ca ng ln trtdi khng sai chnh qu 25mm.

Tng kt cu o bng thc

5. chnh caoTheo mt phng ca ng ln ring r,

khng qu 1mm.

nt o bng my (cch 2mmt im o)

Theo hai im ta ln khng qu 2mm nt o bng my (cch 1m

mt im o).6. chnh ng knh cc con ln thp

trn mt tr ta, khng qu 0,3mm.Tng con ln o bng thc kp

7. lt kh ca phao ng kn khi th,gim i khng qu 0,1At

Tng phao o bng ng h p lcth theo qui nh ng

kim

4. Cng tc ct thp v b4. Cng tc ct thp v b4. Cng tc ct thp v b4. Cng tc ct thp v b----tngtngtngtng

4.1. Khi tin hnh cng tc ct thp v b-tng phi tun theo cc yu cu ca Tiuchun nh nc Kt cu b-tng v b-tng ct thp ton khi - quy phm thi cng v

nghim thu v cc qui nh ca qui phm ny.

Cng tc ct thp

4.2. Trong trng hp ct thp si cng cao c lm gia nhit, vic th nghimkim tra tnh nng ca si thp ch tin hnh sau khi gia nhit xong.

4.3. Khng cho php dng h quang in ct si thp cng cao, dy cp thpv thanh thp chu lc; khng cho php dng hi hn ct cp thp c bc; cm vic hnst gn vo ct thp chu lc m khng c bin php bo v ct thp ny khi s tc ngca tng nhit v tia la; khng cho php dng ct thp chu lc lm dy dn mch ca my

hn in hoc lm dy tip t cho mt my in.

4.4. Trong trng hp n BVTC quy nh ni buc ct thp sn v li thpbng tay, th khng c php dng cch hn nh.

4.5. Si thp cng cao, dy thp bn, cp thp v cc loi ct thp khc dngtrong kt cu b-tng phi c chn theo ng chng loi yu cu ca n thit k, phic lu gi trong nh kho kh gio v thong gi; phi c bin php chng g cho cc loict thp trong mi trng khng kh m.

Khng cho php di chuyn cc b hoc cun thp mt cch tu tin, gy nn tnhtrng un gy, h hng hoc lm bn ct thp.

Khi vn chuyn ct thp nguyn kin v ct thp ch to sn thnh sn, phichn phng tin thch hp vt liu khng b t, bn hoc dnh, cc loi ho cht cmui v a xt.

4.6. Tt c vng neo phi c lau chi sch khng cn du m v khng c lmhng cc rnh ren, trc khi lng t vng neo vo cc b ct thp; tt c cc li neo cngphi c lau sch v kh b mt li trc khi ng vo vng neo.

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4.7. Trc khi lp t ct thp chu lc lin kt sn a vo vn khun, phi tinhnh nghim thu v lp bin bn.

Trong qu trnh lp t ct thp, khng cho php hn nh (hoc buc) ct thp chulc vi cc loi ct thp phn b, cc ct ai v vi bn thp m gi cng nh vi vnkhun hoc cc chi tit khc.

Phi dng trc tip kh nn thi sch nc v cht bn bm vo khe rnh vn khun,

trc khi t lng ct thp chu lc vo bn trong vn khun .i vi ct thp c cng trc trn b, cn lu chng g cho ct thp ny trong

thi gian cha b-tng. i vi ct thp c ko sau trong ng ghen, cn ch phngnga ct thp ny c th b xt st.

4.8. Mi cng tc lp t trong kt cu lp ghp hay ton khi(khng k nhng iub sung trong BVTC) u phi c tin hnh mt cch t m trc khi b-tng; cc ktqu kim tra v nghim thu phi c ghi vo bin bn i vi cc hng mc cng tc ndu.

4.9. Trnh t cng ko ct thp trong kt cu phi tun theo ch dn ca n thit

k. Kt qu cng ko tng si hoc b si cng mt lc phi c ghi vo nht k cngtrnh.

4.10.Khi cng ko ct thp trong kt cu b-tng, phi m bo cc yu cu sau:a)Cng b-tng trong kt cu v v tr mi ni t khng c thp hn tr s

quy nh ca thit k tng ng vi mi cng on, cng b-tng c xc nh bngphng php khng ph hu mu hoc bng th nghim nn mu; trc khi cng ko ctthp, phi kim tra kch thc ca kt cu theo thit k v phi m bo khng c vy g, kh v nhng khuyt tt khc lm nh hng n cht lng ca b-tng;

b) Kt cu nn p phi ta ng v tr theo ch dn ca thit k, cn im ta gidm phi m bo chuyn v t do;

c) u neo v kch phi c t ng tm trng vi si thp ko cng v ginguyn v tr trong sut qu trnh cng ko;

d) Ct thp cng ko xong phi c ph lp bo v, hoc c b-tng chmln, hoc c bao ph bng vt liu ngn cch theo ch dn ca thit k bo v ct thpkhi b g trong sut qu trnh cng ko.

4.11.Khi cng trc ct thp trn b, cn phi:a) Trc ht chn la ct thp cng chu lc ng u: ko cng c nhm ct thp

hoc cc nhm thp n gi tr 20% ca lc cng kim tra, v gi trng thi ny;b) Theo di trng thi chu lc v gi nguyn v tr thit k ca ct thp, ca dy

no hoc ca cc thit b gi im un ca ct thp.

c) m bo vic iu chnh li nhng si ct thp c lc cng thp hn lc cng tcng ban u, no cht li hoc cng ko li cc b ct thp .d) Khng c gy ra mt mt ng sut trong ct thp to d ng lc vt qu tr s

quy nh ca thit k (mt mt do chnh lch nhit ca ct thp cng ko v b-tng khininh kt); i vi kt cu theo thit k in hnh, quy nh khng qu 60MPaa(600kg/cm

2).

4.12. Kt cu b-tng, khi c ni lc cng trc do ct thp truyn vo, phi mbo c cng bn khng nh hn tr s quy nh ca thit k. Trong trng hp ny, cntun theo nhng yu cu sau:

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a)Kt cu phi c ta vo v tr theo d nh ca thit k sao cho c chuyn v tdo; khng c cht ti ln kt cu ngoi d nh ca thit k, k c tr s phn lc do titrng b tc ng;

b)Vic nn p ln kt cu phi c thc hin mt cch nhp nhng; trnh t nhtng tao si thp cng cao (CC) phi tun theo ch dn ca thit k;

c)Trc khi ct ct thp bng hi hn, phi lm sch mt ngoi thp cho n mt b

t khng c vt b-tng hoc cht bn khc bm vo ; vng ct ct thp b nung nng (saukhi ct) cng phi c lm sch. Khng cho php ct ct thp bng in hn; nn ct ctthp bng ca.

4.13.Mt ngoi cn neo v u cc b thp chu lc cn bc b-tng c chiu dykhng nh hn chiu dy tng bo h ca kt cu ch th.

4.14.Vic cng ko thanh thp CC bng phng php nhit in phi c tinhnh theo yu cu cu thit k, ph thuc biu cng ngh vch ra trong BVTC.

4.15.Vic kim tra cht lng mi ni ct thp khng chu lc phi c thc hin

ph thuc chng loi thp v c ch dn trong n kt cu cng trnh.Phng php kim tra (ph hu hay khng ph hu mu) c quy nh trongthit k.

Theo phng php khng ph hu mu, phi kim tra 100% cc mi ni hn chochng loi thp u tin, 50% cho chng loi th hai v 15% cho chng loi th ba.

Theo phng php ph hu mu, vic kim tra theo thit k quy nh vi s mu thph thuc chng loi mi ni cn kim tra.

4.16. Nghim thu cng tc ct thp, gim st cht lng, khi lng v phngphp kim tra ct thp, thc hin theo quy nh trong bng 4.



1. Thi gian bo qun si thp CC,ct thp v cp thp ni che ph knhoc trong nh kho-khng qu 1 nm. m khng kh- khng c qu 75%.

100% ct thp CC Dng my o m

2. sai lch cho php so vi thit k,tnh theo mm:

Kch thc bao ngoi ca sn ctthp lin kt v li ct thp:

i vi ct , dm, bn v vm, 10

Tng sn o bng thc

i vi mng, 20Khong cch gia cc thanh ct thp

ring r hoc cc hng ct thp vi nhautheo chiu cao:

nt nt

i vi kt cu c chiu dy trn 1mv kt cu mng, 20

nt nt

i vi dm, vm, bn, c chiu dy(theo mm)

Tng sn o bng thc

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Trn 300l 10. nt nt

T 100 n 300, 5 nt nt

n 100, 3 nt ntKhong cch gia cc ct ai ca dm

v ct, gia cc lin kt ca sn ct thp,

l 10.

nt nt

Khong cch gia cc ct thp phnb trong mi hng, 25.

nt nt

V tr cc ct ai so vi trc kt cu(hng ng, hng ngang hoc xin), l15.

nt nt

3.Sai s cho php khi ch to, lp tv cng ko ct thp so vi tr s thit k:

Chuyn v dc tng h u mtthanh ct thp, l 0,5mm cho mi 10m dica b thanh.

Tng thanh ct thp o kim tra theomu

Cng ko t u neo cc si thpCC-khng thp hn tr s ni lc koca si.

Lm 6 mu kim tratrc khi thi cng.

Lp li vic kim trany khi dng n

10.000 neo, trongtrng hp thay ikhun c v sa

cha thit b cp gineo

Lm th nghim kot o kim

Kch thc u neo, 0,2mm nt o bng thc cpcom pa

4.Sai s (theo mm) khi kim tra chiu

di ca hai u thanh chu ko:Theo nhm thanh, l 10.Theo th t, l 30.

Tng thanh ct thp o bng thc trn

b cng hoc trn gi

5.Sai s (theomm) v khong cchgia cc thp hoc thanh thp vi cc chitit khc ca ct thp chu lc:

nt o bng thc trnb cng hoc trn gi

Khi c li tnh theo thit k nh hn

60mm, l 5.Tng b phn kt

cunt

Khi c li tnh theo thit k ln hn60mm, l 10.

nt nt

6.Sai s (theo mm) v v tr thit k

ca neo trong b-tng khi cng ko ctthp v cp thp trn b:mt u gn u dm, l 40

Tng ct thp nt

mt gia, gn u dm l 60. nt o bng thc cc mt khc, i vi cc neo cn

li, 200 (khi khong cch tnh nh nhtgia cc neo l 100mm).

nt nt

7.Sai s cho php khi kim tra chiu Tng kt cu neo o bng thc

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di L ca thanh ct thp (khong cchgia mt trt trong ca neo v u neo)l 0,001, trong phm vi + 50; -40mm.

8. knh ca mt ta (b cng trongphm vi t kch v neo, khng qu 1:100

Mi thng kim tramt ln, khi ko trn

b v khi ko sau

trn khi b-tng mi nt lin kt

o trc tip t trnb cng hoc trn gi

9. chnh xc ca im t kch khicng ko nhm ct thp tng ng vi lctc dng ng u l 10mm

Tng im t kch o kim tra gcnghing v mt ggh theo mt phng

ta10.Cng trc cp thp xon hoc bn

i, ko vt 10% tr s ni lc kim tra,duy tr trong khong 5 pht.

Tt c cp thp o bng thc dt

11.Dung sai cho php (tnh theo %) vcc tr s cng ko ct thp bng kch(so

vi ni lc kim tra):Ring r i vi ct thp cp thp,thanh hoc si thp khi ko

Tng ct thp o lc bng my otn s hoc my o

ng tng tTheo trnh t l 5 20% ct thp trong

nhmo kim tra bng

my p k v dndi

Theo nhm l 10 Tng nhm ntTng ct thp nt

Chung tt c i vi ct thp, cpthp, thanh v si trong mt nhm, l 5.

o bng thc dt

12.Sai s v tr s dn di so vi thitk (theo %)

Ring r i vi ct thp, cp thp,thanh v si thp, l 15

Tng nhm nt

Trong mt nhm ct thp, cp thp,thanh v si, 10.

Tng thanh ct thp nt

13. chnh xc khi o dn din hi chu ko (theo mm) ca :

Ct thp dc l 0,1

nt o bng dng c c chnh xc tng

ngCt thp ngang (ct ai) l 0,1 nt nt14.Tr s (%) cho php ca tng cc

mt mt ng sut ko gy ra do ma st kch v phn ngm ca neo.

Vi neo kiu chn u c ng bc, l5 (*)

Ch khi xc nh nilc kim tra

o kim tra qua myp k v dn dibng my o tn shoc my o ng

tng tVi neo hnh cn, 10(*) nt nt

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15.Thi hn cho php (tnh theo ngym(**) h ct thp trong rnh, khngc bo v chng g, nhng cha cphun p va bn trong (khi m khngkh ca mi trng bn ngoi nh hn75%)

L 30, i vi thp si. Tt c cc ct thp Kim tra thi giantheo ng k (snht k thi cng)

L 15, i vi cp thp. nt ntL 30, i vi thp thanh(to d ng

lc bng nhit ).nt nt

(*) - Tr s ny c th c xc nh qua th nghim.(**) - Cho php c thi hn cao hn quy nh ny ch trong trng hp p dng gii phpc bit bo v ct thp tm thi khi b g. D c p dng gii php bo v ct thptm thi, nhng i vi tt c ct thp chu lc h trong rnh khng c qu thi hn

3 thng.Tt c thi hn cho php c tnh tng ng m mi trng l 75%; nu m thc t ln hn, tt c thi hn cho php u phi rt ngn hn theo quan st hintrng.

Ghi ch :Ghi ch :Ghi ch :Ghi ch :1. Cc ct thp dng si, cp v thanh nu c sai lch v tr s lc cng ko vt

qu gi tr quy nh trong bng ny, u phi cng ko li hoc thay th.2. Cho php li trong kt cu khng qu 5% s lng ct thp trong tng s,

s ct thp ny hoc ko qu n di 20% ni lc lm vic, hoc ko cha n ng sutchu ca - si thp .

3. trit tiu dn n hi ca ct thp, tin hnh to ni lc trc bng 20%

ni lc kim tra trong ct thp

Cng tc b tng

4.17. Vic sn xut v vn chuyn b-tng phi tun theo quy nh ca Kt cu b-tng v b-tng ct thp ton khi-quy phm thi cng v nghim thu do Nh nc banhnh v cc qui nh ca qui phm ny. Hn hp b-tng c sn xut trong my trnquay cng bc; cho php sn xut hn hp b-tng t nhuyn ln hn hoc bng 5cmbng my trn kiu trng lc, (o bng st t do).

Va xi mng- ct c sn xut trong my trn va. Cho php sn xut va xi

mng-ct trong my trn quay cng bc lm b-tng.

4.18. Cht ph gia cho va c a vo my trn ng thi vi vic a nc vo.Cht ph gia m c phi c ho sn cho long ra. Cc loi ph gia phi c ho trnsn trc khi vo my trn cc ct liu, theo ch dn ca hng ch to.

4.19. Thng cha, khi dng vn chuyn hn hp b-tng, cn phi c lm schv thau ra sau mi ln cha hn hp; vic lm sch v thau ra thng cha khng c chm lu qu 30 pht.

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4.20. Vic b-tng phi thc hin theo quy nh ca BVTC. Hn hp b-tngphi c vo vn khun thnh tng lp ngang, khng c gin on theo hng dichuyn t mt pha cho tt c cc lp. Khi din tch mt ct ngang ca kt cu b-tng tridi trn 4m hoc tri rng trn 3m, cho php v m nn hn hp b-tng theo cc lpxin, hnh thnh cc on ngang di 1,5 - 2m ca cc lp chng ln nhau. Gc xintheo mt phng nm ngang ca cc lp chng ln nhau khng c vt qu 30 0, trc

khi tin hnh m nn. Sau khi v ri u hn hp b-tng theo tng lp trn sut bmt, mi tin hnh vic m nn b-tng theo tng on.

4.21. Hn hp b-tng c th c cung cp bng my bm hoc my nn kh chomi hnh loi kt cu vi cng sut b-tng khng nh hn 6m3/gi, mc d c iukin kh khn no v nhng ni mi phng tin c gii khng th qua li c.

4.22. Trc khi tin hnh m nn, tng lp hn hp b-tng phi c dnu trn b mt ngang ca kt cu. Chiu cao tri ln cc b so vi cao chung ca mtphng hn hp b-tng, trc khi m nn, khng c qu 10cm. Cm dng cc loi mrung san u v nh bng cc lp hn hp b-tng nm trong vn khun. Cc lp hn

hp b tng ch c tin hnh m nn sau khi dn tri v san u trn b mt .

4.23. Phn hn hp b-tng b mt mt trn dy chuyn v thit b b-tng vokt cu phi c tnh b cho . Cm vic dng nc b vo phn hn hp b tiu haotrong qu trnh b-tng.

4.24. Lp hn hp b-tng sau phi c trong thi gian lp b-tng ri trccha b ninh kt. Nu qu trnh b-tng b gin on vt qu thi gian bt u ninh ktca lp hn hp b-tng trc, phi lm ngay vt ni thi cng. Lp b-tng vt ni nyphi t cng t nht l 1,2 MPa mi c tin hnh tip trn vt ni thi cng. thigian cho php tip hn hp b-tng sau ln gin on c xc nh qua mu trongphng th nghim, ng thi ph thuc vo phng php lm sch lp mng xi mng trn

mt vt ni thi cng.V tr ca vt ni thi cng phi c quy nh theo BVTC. Nu khng c quy nh

ring trong thit k th b dy ca lp b-tng tip sau khi t vt n thi cng phi t tnht bng 25cm. Cc vt ni thi cng khng c t nhng on c nc chy qua, v nhng on ngp nc c cht n mn.

4.25. Hn hp b-tng cho mi lp ri hoc mi ln hon thin bng my rung,phi c m nn k sao cho c chc li mi ngng, khi vng bt xi mng ni ln trnmt v ch tip gip vi vn khun.

4.26. Cc loi thanh rung, x rung hoc my m bn ch c th dng thch hp vi

kt cu b-tng; chiu dy mi lp hn hp b-tng c v m nn khng c qu25cm.i vi kt cu BTCT, vic to rung ng mt ngoi c th p dng khi m nn

lp b-tng mt trn v mt ngn cch.

4.27. Mt thong ca phn b-tng mi xong (k c khi tm ngng ) phi cbo m khi b mt nc, phi che y kn trnh nc ma ri thng vo .

Vic bo v mt thong ca b-tng mi xong phi c duy tr ngay trong sutthi gian cho n khi b-tng t cng khng nh hn 70% cng thit k .

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4.28. Trong qu trnh hn hp b-tng phi m bo nguyn vn trng thi cahnh dng kt cu, vn khun v dn gio . Khi pht hin c bin dng hoc c chuyndch cc b kt cu vn khun, gio hoc ch lin kt, phi c gii php chnh sa ngaylp tc hoc trong trng hp cp bch, phi nh ch ngay vic thi cng khu vc xy ra.

4.29. Nhng yu cu k thut thi cng b-tng, khi lng v cch thc kim tra nghim thu cng tc b-tng, c quy nh theo bng 5.



1. Ti v tr , hn hp b-tng phim bo st theo thit k v khng saikhc qu 15%, cn ch s cngkhng sai lch qu 10% so vi thit k.

Khng t hn 2 lncho mt hn hp,hoc c 2gi kimtra 1 ln khi gp thi

tit thay i, mthay i v khi thnhphn ct liu c binng.

Kim tra theo TCVN4453 - 1995 v cn

c vo s nht k thicng .

2. Nhit ca ct liu hn hp b-tng khng c sai khc qu 20C sovi tr s tnh ton khi lm th nghim(nc v thnh phn hn hp khi cho vomy trn, hn hp b-tng hoc va khi ra khi my, hn hp b-tng hoc vati v tr .

C 4 gi kim tra 1ln vo ma ng;hoc 2 ln kim tracho mt ca lm hnhp b-tng trongiu kin nhit khng kh thuntin.

Da vo nht k thicng, dng nhit k

o.

3. Chiu dy mi lp hn hp b-tngkhng c vt qu tr s sau:

Trong sut qu trnh b-tng.

o v quan st

40cm - khi m cht trn bn rung, rung hoc h rung n hi.

nt nt

25cm - khi cch m cht nh trn vkt cu c hnh dng phc tp, c ct thpb tr dy c.

nt nt

5 n 10 cm - khi b tr u my m

dc theo chiu di kt cu, my c gncht v t cng vo thnh bn kt cu.

nt nt

40cm - khi m cht bng my mdi cm tay.

nt nt

25 cm - khi dng my m bn hocmy rung trn x i vi kt cu b-tngkhng c ct thp v c mt lp ct thp.

nt nt

12cm - i vi kt cu c 2 lp ctthp

nt nt

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4. Phn nh khi lng b-tngcho ton b kt cu nh sau:

Din tch mi khi - khng qu50m2.

Cho tng kt cu o v da vo nhtk thi cng

Chiu cao khi - khng qu 2mB tr mi ni thi cng - nhng ch

c tht hp.

nt nt

5.Chiu cao (theo m) ri t do ca hnhp b-tng khng c ln hn tr s:

nt nt

2 - khi vo kt cu b-tng c ctthp.

nt o v quan st

1 - khi cu kin BTCT c sn. nt nt6 - khi vo kt cu b-tng khng

c ct thp, vi iu kin m bo ng nht ca b-tng v tnh nguyn vnca vn khun.

nt nt

5. Thi5. Thi5. Thi5. Thi cng Nn v Mngcng Nn v Mngcng Nn v Mngcng Nn v Mng

5.1. Cng tc thi cng nn v mng cn theo cc yu cu ca Tiu chun hin hnh,cc qui nh ca qui phm ny v n thit k k thut, BVTC.

5.2. Trong trng hp thi cng cc dng mng khc nhau cn phi tun theo ccmc trong phn 5 ca qui phm ny, cho php tham kho cc ti liu c lin quan khcnh:

a) s thi cng v v tr mng v b mng, cu to cc v h thng vng vyngn nc km theo cc ch dn v sai s theo mt bng v chiu cao;

b) bng tin tng hp, s nht k ng cc, cc ng, v cc vn thp, nht k

khoan v b tng vo l cc khoan nhi;c) cc kt qu th ng cc ng (dng ba ng hoc ba rung);d) cc kt qu nn tnh cc ng, cc ng hoc t nn mng (nu h s thi cng

yu cu).

H cc v cc ng

5.3 Cc c ng h bng ba m bo su ngm thit k n chi nhngkhng c nh hn 0,2 cm cho mt nht p, cn cc ng c h xung bng ba rungvi nng sut h rung giai on cui khng nh hn 5 cm/pht. Nu yu cu trn khngc kh nng t c, cn p dng phng php xi mi cc hoc t cc vo l khoan mi h cc n chi tnh ton, i vi cc ng p dng phng php o t pha dimi cc trc hoc dng ba rung loi ln hn.

Cho php o t ct pha di mi cc trc t 1-2m, vi iu kin khi c p lcnc tha trong lng cc, tc l c ct nc trong lng cc cao trn 4-5m so vi caotrnh mt nc hoc cao trnh mch ngm.

5.4. su khoan mi cc bng 0,9 chiu su h cc trong t, cn ng knh lkhoan mi bng 0,9 ng knh cc trn hoc 0,8 ng cho cc vung cng nh ccagic, v c iu chnh theo kt qu h th cc.

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5.5. Kt cu cc h xuyn qua tng dy l loi t cng, c thc hin bng cchdng mi khoan dn hng.

Cho php ng cc trc tip qua lp st do mm hoc t st m khng c thnhphn t cng.

5.6. Sau khi h xong cc ng, cn ly ht t mn y lng cc, lm sch, nghimthu y cc (k c vic m rng mi cc) v t lng ct thp trong trng hp cn thit,sau b-tng nhi vo lng cc.

Sau mi ln buc phi dng thi cng, cng vic b-tng nhi c th tip tc thchin nu khong thi gian dng khng lm mt linh ng ca hn hp . Trongtrng hp ngc li ch cho php tip tc cng vic khi c gii php m bo cht lnglin kt tt mt tip gip gia phn b tng mi v phn trc .

5.7. Vic y hn hp b tng trong lng cc ng BTCT trong phm vi c duhiu thay i nhit do tc ng ca mi trng xung quanh (nc, khng kh, t) phithc hin theo yu cu c bit c ch dn trong BVTC (la chn thnh phn hn hp,

cch nhi b-tng, lm sch mt trong lng cc,...) cao trnh di phm vi mton bng mt ln ng knh cc nhng khng nh hn 1m, m bo an ton cho ccc th hn ch s xut hin vt nt trong khi b-tng nhi.

5.8. Vic kim tra v nghim thu cht lng cng tc ng cc v cc ng qua cca tng khc nhau phi tun theo yu cu k thut ghi trong bng 6.


Yu cu k thutYu cu k thutYu cu k thutYu cu k thut i tng kim trai tng kim trai tng kim trai tng kim tra Phng phpPhng phpPhng phpPhng phpkim trakim trakim trakim tra

1. Sai lch cho php v mt bng tim cc v cc1. Sai lch cho php v mt bng tim cc v cc1. Sai lch cho php v mt bng tim cc v cc1. Sai lch cho php v mt bng tim cc v ccng so vi thit k ti v tr y b hoc i cc:ng so vi thit k ti v tr y b hoc i cc:ng so vi thit k ti v tr y b hoc i cc:ng so vi thit k ti v tr y b hoc i cc:

a) i vi cc vung, cc tam gic v cc ckch thc khng ln hn 0,6 m (tnh theo cnhcc vung, cnh nh cc tam gic, hoc ngknh cc trn) b mng ti ch hoc trn icc, tnh theo tr s cnh hoc ng knh (m)nh sau:

Khi cc b tr mt hng theo mt chnh cu:- theo hng dc cu, khng vt qu 0,2 ca

tr sTng cc o bng thc

- theo hng ngang cu, khng vt qu 0,3

ca tr s

nt nt

Khi cc b tr hai hng hoc nhiu hn theo mtchnh cu:

- i vi hng cc ngoi cng, dc cu, khngvt qu 0,2 ca tr s

nt nt

- i vi hng cc gia, dc cu, khng vtqu 0,3 ca tr s

nt nt

- theo phng ngang cu, khng vt qu 0,4 nt nt

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b) i vi cc vung, cc tam gac v cc trnc kch thc khng ln hn 0,6 m sai lchcho php l 5 cm (khng ph thuc vo s lngcc) b mng kiu lp ghp hoc trn mt nnbt buc phi dng cc thit b nh hng (lngkhung ct thp, khung dn hng, cn cu).

c) i vi cc ng ng knh ln hn 0,6 mn 3 m, ng xin, tnh theo tr s ng knh(m) nh sau:Khng s dng thit b nh hng:

- i vi cc n v cc b tr mt hng theomt chnh cu, khng vt qu 0,1 ca tr s.

Tng cc ng o bng thc

- i vi cc b tr 2 hng hoc nhiu hn,khng vt qu 0,15 ca tr s.

nt nt

Khi c khung dn hng (khung nh v)- nu trn cn, khng vt qu 5 cm Cho tng cc ng

o bng mythu bnh

- nu trn nc, su nc l H(m) khng

vt qu 0,03H -

nt nt

2. v dch cho php ca tim2. v dch cho php ca tim2. v dch cho php ca tim2. v dch cho php ca tim h khung dnh khung dnh khung dnh khung dnhng so vi v tr tim cao trnh mt khunghng so vi v tr tim cao trnh mt khunghng so vi v tr tim cao trnh mt khunghng so vi v tr tim cao trnh mt khungnh sau:nh sau:nh sau:nh sau:

- nu trn cn, l 2,5 cm. nt nt- nu trn nc su nc H(m), l 0,015H. nt nt

3. sai lch ( gim nh) ca chiu su h3. sai lch ( gim nh) ca chiu su h3. sai lch ( gim nh) ca chiu su h3. sai lch ( gim nh) ca chiu su hcc v cc ng so vi tr s thit kcc v cc ng so vi tr s thit kcc v cc ng so vi tr s thit kcc v cc ng so vi tr s thit k (khi h cc (khi h cc (khi h cc (khi h ccvo t trn 4m, c xt n xi cc b):vo t trn 4m, c xt n xi cc b):vo t trn 4m, c xt n xi cc b):vo t trn 4m, c xt n xi cc b):a) Cc di n 10m (vi iu kin tnh kh nngchu theo t nn) l 25cm Tng cc

Quan st obng thc gn

trn thn ccCc di trn 10m, l 50cm. nt nt

b) Cc ng vi mi chiu di l 25 cm nt ntGhi ch:Ghi ch:Ghi ch:Ghi ch:

1. Sai s cho php ca cc cc (cc v cc ng) so vi n thit k, trong mt bng,c tnh ti mng v c tnh ngay trn cc tr khng c b ( b-tng ti ch)c coi nh ti cao trnh b mng hoc i cc. Cc tr s cho php v sai lch v trso vi n thit k theo mt bng ca h cc nu trn bao gm c tr s chuyn v mt y b cc hoc i cc do c sai lch ca cc theo phng ng hoc do c thay i xin cc.

Sai s cho php v thay i gc tang theo phng thng ng (so vi tr s thit k)

ca cc cc xin khng c vt qu 200:1 khi b tr theo 1 hng v 100:1 khi b trt hai hng tr ln.2. i vi cc loi mng v cc tr c b hoc i cc ch to sn, c lin kt

vo cc cc nh cc u ct thp dc th ra v lp y b-tng ti ch, sai lch chophp v v tr cc theo mt bng so vi thit k mt y b hoc i cc khng c lnhn 5cm.

Trong trng hp b v i cc ch to sn, khi lp ghp vo h cc v cc ng, phidng ni ghp kiu lin hp hn thp vi thp v bu lng lin kt, sai lch cho phptrong trng hp ny c qui nh theo thit k.

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3. S lng cc b sai lch khng vt qu 25% tng s cc i vi cc mng v tr c mt hng cc v 40%, i vi mng cc c hai hoc nhiu hng cc.

4. Khi s cc thc t b sai lch so vi thit k vt qu tr s gii hn cho php, vicchp thun kh nng dng li h cc ny phi c c quan t vn thit k mng hoc tr xem xt gii quyt.

Thi cng cc khoan nhi

5.9. Cng tc thi cng cc khoan nhi cn theo cc yu cu ca qui phm ny vtiu chun ngnh v Cc khoan nhi-Qui trnh thi cng v nghim thu.

5.10. Cho php s dng p lc ca ct nc hoc dung dch va st gi thnh vchl khoan thi cng cc khoan nhi; nu v tr l khoan cch cc ngi nh hoc cng trnhhin c nh hn 40m, cn la chn gii php thi cng thch hp m bo an ton n nhcho cc cng trnh ln cn .

Trng hp to l cho cc khoan khng dng ng (ng thp, ng BTCT) givch l m dng gu ngom t (c bit i vi l cc c nc) cn phi hon chnh mttrong l cc khoan n ng knh thit k bng thit b ng doa hnh tr trn (ng chunlm c).

5.11. gi khng cho lng ct thp ca cc b y ln hoc dch chuyn trong qutrnh rt b tng vo l, cng nh trong mi trng hp b tr lng ct thp khng htton b chiu cao ca cc, cn phi c kt cu gng gi c nh lng thp theo ng v trthit k.

5.12. Trng hp gp l khoan kh trong lp ct, l khoan c ng vch (ng thp

hoc BTCT) cng nh l khoan khng c ng vch do xuyn qua a tng st v st ti vtr cao hn mc nc ngm nhng khng xut hin lp ct hoc ct y l, cho php b-tng lng cc khng dng ng dn m rt t do cao ri khng qu 6m.

Trng hp gp l khoan y nc, thi cng b-tng trong lng cc theo phngphp rt ng theo chiu thng ng, c qui nh trong Qui trnh thi cng b-tng dinc bng phng php va dng.

5.13. Cng tc kim tra, nghim thu cht lng thi cng cc khoan nhi phi tuntheo yu cu k thut ghi trong bng 7.


Sai s cho phpSai s cho phpSai s cho phpSai s cho php i tng Kimi tng Kimi tng Kimi tng Kim

tratratratra

Phng php kim traPhng php kim traPhng php kim traPhng php kim tra

1. sai lch cho php v v tr mt1. sai lch cho php v v tr mt1. sai lch cho php v v tr mt1. sai lch cho php v v tr mt bngbngbngbngnh v v trc xin (tgnh v v trc xin (tgnh v v trc xin (tgnh v v trc xin (tg) ca cc khoan so) ca cc khoan so) ca cc khoan so) ca cc khoan sovi thit k: (tnh theo tr s dvi thit k: (tnh theo tr s dvi thit k: (tnh theo tr s dvi thit k: (tnh theo tr s d ---- ng knhng knhng knhng knhcc):cc):cc):cc):Khi b tr mt hng cc theo mt chnh cu:

0,04 d; 1:200 - trng hp thi cng trnnc.

Tng cc o bng my thubnh, ng di v thc

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dy.0,02 d; 1:200 - trng hp trn cn. Tng cc o bng my thu

bnh, ng di v thcdy.

Khi b tr hai hoc nhiu hng cc theo mtchnh cu:

0,1 d; 1:100 - trng hp thi cng trnnc.

nt nt

0,05 d; 1:100 - trng hp thi cng trncn.

nt nt

2. Sai s cho php (tnh theo cm) v kch2. Sai s cho php (tnh theo cm) v kch2. Sai s cho php (tnh theo cm) v kch2. Sai s cho php (tnh theo cm) v kchthc thc t ca l khoan v kch thcthc thc t ca l khoan v kch thcthc thc t ca l khoan v kch thcthc thc t ca l khoan v kch thcm rng bu y cc so vi thit k:m rng bu y cc so vi thit k:m rng bu y cc so vi thit k:m rng bu y cc so vi thit k:

25 - theo chiu su l khoan ( caotrnh)

Tng l khoan o theo ch dn cathit k mng cc.

5 - theo ng knh l. nt nt

10 - theo chiu su ca on hnh tr

m rng bu.

Tng on m

rng

nt

10 - theo ng knh m rng. nt nt

5 - theo chiu cao on hnh tr mrng.

nt nt

3. Sai s cho php (tnh theo3. Sai s cho php (tnh theo3. Sai s cho php (tnh theo3. Sai s cho php (tnh theo cm) v v trcm) v v trcm) v v trcm) v v trt lng ct thp trong lng cc khoan sot lng ct thp trong lng cc khoan sot lng ct thp trong lng cc khoan sot lng ct thp trong lng cc khoan sovi thit k:vi thit k:vi thit k:vi thit k:

1 - theo v tr t ct thp dc vi nhautrn ton chu vi ca lng.

Tng lng ctthp

o bng thc cunthp v thc dt.

5 - theo chiu di thanh thp. nt nt2 - theo c ly cc bc ai xon c. nt nt10 - theo khong cch cc vng ai

cng mt lng thp.nt nt

10 - theo khong cch cc con k tolp bo v ct thp.

nt nt

1 - theo chiu cao con k nt nt2 - theo ng knh ca lng thp ti v

tr t vng ai cng.nt nt

4. Sai s cho php v ch tiu va b4. Sai s cho php v ch tiu va b4. Sai s cho php v ch tiu va b4. Sai s cho php v ch tiu va b----tngtngtngtngvi ln kim hnh chp 16vi ln kim hnh chp 16vi ln kim hnh chp 16vi ln kim hnh chp 16----10cm, b10cm, b10cm, b10cm, b----tng trong nc vo lng cc theo phngtng trong nc vo lng cc theo phngtng trong nc vo lng cc theo phngtng trong nc vo lng cc theo phngphp rt ng theo chiu thng ng:php rt ng theo chiu thng ng:php rt ng theo chiu thng ng:php rt ng theo chiu thng ng:

2 cm - theo tr s st. Theo TCVN Theo TCVN2 % - theo tch nc. nt nt

5. Sai s cho php v ch tiu b tng lm5. Sai s cho php v ch tiu b tng lm5. Sai s cho php v ch tiu b tng lm5. Sai s cho php v ch tiu b tng lmcc khoan:cc khoan:cc khoan:cc khoan:

Khng c vi phm v tnh lin tc trnton chiu di cc

2 cc cho mtcu

Kim tra bng thit bc chng v quan st

+ 20; - 5% cng b-tng nt Kim tra 6 mu t likhoan qua cc.

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Ch to v h ging chm

5.14. i vi mi v tr c th, cn la chn cc gii php thi cng ch to gingchm ph hp vi kh nng k thut ca n v v m bo hiu qu kinh t cao, nh: chto ngay trn v tr t mng (dn mt bng thi cng trc, to mt bng trn o p, lmsn cu cng tc c nh)hoc lm bn cnh v tr xy dng mng (lp cng a ring, lmtrn h ni hoc sn cng tc); km theo cc gii php thi cng h ging chm vo su lngt : dng tc ng ca trng lng bn thn (thm ph ti xp-kch p nu cn; kt hpxi thnh bn; dng o va st ...) hoc dng dn ba rung h.

5.15. Trong qu trnh h ging n cao thit k, cn phi c gii php phngnga kh nng ging b nghing lch (dng kt cu hng dn, o t ng u theo mtbng y ging, cht ti cn bng trn ging trong trng hp dng ph ti cn bng trnging trong trng hp dng ph ti xp hoc kch p...) hoc b kt trong t (dng lpo va st, xi thu lc hoc kh nn, cht ti...).

5.16. phng nga kh nng ct tri xy ra lp y ging, phi m bo sao chochn ging lun ngp su vo t t 0,5 n 1m, cn mc nc trong ging khng cthp hn mc nc bn ngoi. Nu gp trng hp ging b treo hoc khi cn y xa ccm ci nm kt di chn ging, ch cho php tin hnh cc thao tc trong iu kin lunc p lc nc d tha trn mt y ging bng cch y nc vo sao cho mc ncbn trong cao hn mt nc bn ngoi xung quanh ging t 4 n 5m.

5.17. Kim tra nghim thu cht lng ch to v h ging chm phi tun theo ccyu cu k thut ghi trong bng 8.

Bng 8Bng 8Bng 8Bng 8Sai s cho phpSai s cho phpSai s cho phpSai s cho php i tng kimi tng kimi tng kimi tng kim

tratratratraPhng php kimPhng php kimPhng php kimPhng php kim

tratratratra1. sai lch cho php (tnh theo %) v kchthc mt ct ging so vi thit k:0,5 - theo ng knh ngoi, nhng khng

qu 10 cm.Tng ging o bng thc

0,5 - theo chiu di v chiu rng caging, nhng khng qu 12 cm.

nt nt

1 - theo ng cho ca ging. nt nt

0,5 - theo ng bn knh trn quanhging, nhng khng qu 6 cm.nt nt

2. sai lch cho php (tnh theo cm) vchiu dy thnh ging so vi thit k:3 - nu l b tng nt nt1 - nu l b tng ct thp nt nt

3. sai lch cho php v v tr h ging sovi thit k:

Theo chuyn v ngang mt trn ca ging nt o bng my kinh

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l ... 0,01 ca su h ging v v thcTheo phng thng ng l ... 1% ca nghing.

Tng ging o bng qu di vthc

Theo su h ging l ... 30 cm. nt nt

Thi cng mng nng

5.18. Khng cho php c s gin on gia hon thnh thi cng h o vi xydng kt cu mng. Trong trng hp phi gin on cng vic trn, cn c gii phpm bo c tnh t nhin ca t nn ti . Lp y h o gn n cao thit k(khong 5 - 10 cm) cn c sa dn sch mt trc khi thi cng mng.

5.19. Trc khi thi cng mng phi hon thnh vic a nc mt v nc ngm rakhi h o (o rnh hoc m ng thot nc ngm, h mc nc ngm...)cn c lachn ph hp vi iu kin ti ch v c s chp thun ca t chc t vn thit k. Trongtrng hp ny, cn c gii php khng cho t bn ng di y h o v khng lmph hu c tnh t nhin ca t nn ti .

5.20. Trc khi thi cng mng cng trnh cn phi lp bin bn nghim thu h ovi s tham gia ca Ch cng trnh, T vn gim st v Nh thu; trong trng hp c bitphi c s tham gia ca c quan T vn thit k v n v o c.

Hi ng nghim thu cn cn c vo h s thit k mng: V tr, kch thc, cao y mng, hin trng ca nn v c tnh ca t nn, cng nh kh nng t mng theothit k hoc thay i cao trnh mng.

Vic tin hnh kim tra nn t mng khng c lm tn hi c tnh t nhin cat ti ; khi cn thit, ngoi vic ly mu lm th nghim trong phng, c th thm dhoc p th trn nn t.

Nu Hi ng nghim thu thy c trng ca t nn theo thc t khc vi thit kth cn phi xem xt n BVTC; vic tip tc thi cng phi c c quan T vn thit kv Ch cng trnh quyt nh sau khi i chiu v tnh ton li.

5.21. Cc kt cu c sn dng thi cng mng nng phi c t trn mt lpm ct, dm hoc ct xi mng c dy khng nh hn 5 cm (i vi t nn st) vc m cht san phng mt cch cn thn.

Trong trng hp nn c ch lm cc b th phi p b t cng loi m bomt nn phng v cht.

5.22. Vic kim tra nghim thu cht lng thi cng phi tun theo cc yu cu kthut ghi trong bng 9.


Sai s cho phpSai s cho phpSai s cho phpSai s cho php i tng kim trai tng kim trai tng kim trai tng kim tra Phng php kimPhng php kimPhng php kimPhng php kimtratratratra

Sai s cho php (tnh theo cm) v kch thcSai s cho php (tnh theo cm) v kch thcSai s cho php (tnh theo cm) v kch thcSai s cho php (tnh theo cm) v kch thcthc t v v tr b tng mngthc t v v tr b tng mngthc t v v tr b tng mngthc t v v tr b tng mng ---- b mng tib mng tib mng tib mng tich (hoc lp ghp) so vi n thit k:ch (hoc lp ghp) so vi n thit k:ch (hoc lp ghp) so vi n thit k:ch (hoc lp ghp) so vi n thit k:5 ( 2 ) - Theo kch thc mt bng Tng mng v b o bng my

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kinh v v thcdi

+ 2; - 5 ( + 1; - 0,5 ) - Theo chiu dy lpbo v.

Tng mng v b o bng mykinh v v thc

di2 ( 1 ) - Theo cao trnh nh (mp) mng

hoc b.

nt nt

2,5 (1) theo v tr mt bng soo vi tim cu nt nt

Ghi ch:Ghi ch:Ghi ch:Ghi ch:Tr s ghi trong du ngoc trn bng tng ng vi mng v b lp ghp.

Trong qu trnh thi cng mng nng, cn kim tra:Phn t phi dn ht trong h o, cu trc ca t nn khng cho php b xo trn

hay b hu hoi;Cu trc ca t khng cho php b hu hoi trong thi gian ht dn, chun b mt

nn v lp t cc khi mng c sn;Gi cho t trong h o khi b ngp nc d lm lp trn mt nn b nho v xi

mn; c trng ca t nn thc c so vi thit k;Tnh y ca cc gii php p dng bo v t nn khi b bin tnh trong thi

gian h o h l ra v cho n khi hon thnh xy mng; su v kch thc thc t ca mng, cng nh v cu to v cht lng vt liu

lm mng, so vi thit k.

6. Thi cng cu cng b tng v6. Thi cng cu cng b tng v6. Thi cng cu cng b tng v6. Thi cng cu cng b tng vb tng ct thp.b tng ct thp.b tng ct thp.b tng ct thp.

6.1. Khi xy dng cu cng BT v BTCT phi tun theo cc iu qui nh ca tiu

chun Nh nc v Kt cu b-tng v b-tng ct thp- Quy phm thi cng v nghimthu, tiu chun ngnh v Qui trnh thi cng v nghim thu cu b-tng d ng lc, ngoira, phi tun theo cc yu cu k thut nu trong Qui phm ny.

6.2. Trong giai on thi cng lp hng, kch y, lao ko, ch ni kt cu nhp dm,nh thu xy dng phi c trch nhim lp trc cc bc cng ngh thi cng trin khaithc hin.

6.3. Vic lp t cc kt cu c sn ch c php bt u sau khi kim tra bngmy v cao v v tr mt bng ca m tr, mng, v cc thit b ph tm thi cng,cng nh cc cng vic o c nh v xc nh v tr lp t kt cu theo thit k, ktqu kim tra c ghi vo bin bn.

Trc khi lp kt cu nhp trn cc tr m phi xp t sn cc gi theo ngtim cu.

Qu trnh lp t kt cu, t khi ghp ni cu kin cho n khi xong ton b, phithng xuyn theo di v kim tra bng my. Ni dung kim tra gm: chnh xc v v trcc on hoc khi lp, trng khp mt tip gip, cc chi tit k m, cc khoang trng,cc rnh ng lun v cc chi tit kt cu ti mt ni ghp v mi lin kt.

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6.4. Sau mi khoang ch to xong (hoc mi khi lp) ca kt cu nhp, u phidng trc c kim tra v tr khoang lp theo mt bng v mt ct dc. Khi dng trc c kim tra, phi theo di ln ca tr trong qu trnh thi cng, cn trong trng hpcn thit, phi xt tnh n nh hng ca bin dng tc thi do c gia nhit khng u lnkt cu.

Trong qu trnh lao ko dc (hoc sng ngang) kt cu nhp trn h con ln phi tin

hnh kim tra thng xuyn bng trc c v v tr tim nhp cu v cc tr (k c tr tm). tin hnh kim tra trng thi ng sut trong kt cu khi c ch nh ca thit k.

6.5. Khi thi cng lp t kt cu cu phi p ng cc yu cu c bn sau:a) Cn cu thi cng t ti v tr c xc nh trong BVTC v b tr ngoi thc

a. Cm vic ngm gi my cu vo kt cu ang lp rp, cm vic neo gi v tho h khilp nhng v tr cha c xem xt trong thit k TCXD;

b) Vic h kt cu nhp xung sn o, vic tho d sn o, cho kt cu nhp tavo con ln v vic iu chnh tr s phn lc gi ta hoc tr s ng sut u phi tun theocc yu cu k thut nu trong h s thi cng;

c)Vic lp t khi th ln t cu kin phng dng phin (bn) c thc hin bng

cch dng gi dn hng hoc kt cu khc tng t, m bo chnh xc v hnh dngkhi cng nh mt ct dc - ngang khi th, m bo ng dy ca lp tip gip cc cukin;

d) Ch tin hnh tho b hoc tng cng cc b phn lin kt khi khng xut hinni lc ph trong cc b phn .

6.6. Tt c cc cu kin v cc ph kin trc khi lp t thnh khi ln phi ckim tra k. Nu pht hin c sai st, Hi ng nghim thu bn bc c gii php khcphc.

Trn cc cu kin dn tri ra lp rp cn phi ghi r mt ngoi: danh s v trnglng m hng, im trng tm ca cu kin v tr mc cu cng nh ng tim kim tra vtr t mc o c.

6.7. B mt tip gip ca cu kin nhp cu BTCT, trc khi chuyn vo v tr lphoc trc khi ghp thnh khi th, cn phi lm sch bng phng php phun ct hocbng bn chi. Khng c dng cc dng c no p hoc bm vo mt tip gip.

Vic lm sch b mt tip gip ca cu kin phi c thc hin k lng v cnghim thu cn thn.

6.8. Ti cc b mt tip gip (mt cu) ca cc t ng cng BTCT c sn nu bst v do b c st vi mc cu, trc khi lp t, phi c sa cha v trt va b-tnglin mt nh ban u; khng c dng dng c c khot vo thn cng hoc khngc k t cho t cng b un vng.

6.9. Khi s dng cc phng tin chuyn ch ta v ghm cc cu kin cn phich khng pht sinh bin dng d trong kt cu; mt u cc khi lp ghp ni theochiu di kt cu v cc mt chng thm phi c bo v khi b st v.

Vic vn chuyn cc loi dm kh ln, cc cu kin c sn ca kt cu nhp v mtr, cng nh cc cu kin BTDL, phi c thc hin theo ng cc yu cu c bit nutrong BVTC hoc cc yu cu k thut qui nh trong cc tiu chun ca Nh nc vngnh GTVT; nu vn chuyn trn sng, phi tun theo ch dn ca c quan qun l ngsng.

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Vic xp t cc cu kin ln phng tin vn chuyn phi m bo neo chng chcchn, trnh c tc ng ca lc gi, lc xung kch v lc ly tm. Trong trng hp cnthit phi bo m xp t hng trong khun kh nht nh c th xoay chuyn d dngkhi phng tin i vo ng cong; trng hp cu kin di chuyn ch trn xe moc, mtu ca cu kin phi trn mt ta sao cho d di ng; nu l phng tin ch ni, phim bo n nh v thng bng khi di chuyn.

6.10. Cc cu kin phi xp vo kho cn p ng cc yu cu v bo qun nh sau:- Khng c qung nm hng ln cc phng tin vn chuyn;- Gi gn cc cu kin khng b h hng do dy buc hoc cc chi tit kp gi khc.- Khng c t cc khi lp BTCT ln cc con k.Cc loi gi cu cao su v cc b phn khe co dn mt cu phi c bo v

trnh tc ng ca nh sng mt tri, phi cch cc thit b sy t nht l 1 m, trnh mi tcng ca du la v cc ho cht khc gy ph hu cao su.

Lp t cc mi ni thi cng cu

6.11. Cc ct thp ch v tm lt phi c hn ghp li sau khi ghm gi cccu kin c sn ng v tr thit k.

Trnh t thao tc hn phi thc hin theo ch dn ca thit k, theo cc yu cu caTiu chun ngnh Cu thp v kt cu thp- quy trnh thi cng v nghim thu v bo mgim nh nht tr s ng sut ph pht sinh do hn.

Khi chnh sa cc u ni cn ch loi tr cc vt nt gy thp v khng lm votng bo h b-tng.

Cng tc b-tng mi ni ch c thc hin sau khi nghim thu mi hn vt ct thp, cng nh khc phc cc sai st pht sinh.

Ti nhng mi ni m ct thp ch khng s dng hn hoc ti cc chi tit m lt,ch c thc hin b-tng sau khi hon thnh cng vic chnh sa mi ni v c

nh cc cu kin c sn vo ng v tr ni ghp theo thit k. Cc mi ni dc giacc phin dm (bn dm) v cc mi ni ngang ca nhp dm gin n c thc hin b-tng sau khi h dm vo gi cu chnh thc. Trnh t b-tng ti cc mi ni trnnhp dm lin tc hoc lin tc nhit c tin hnh theo n BVTC ring.

6.12. Ti cc mi ni trn mt cu, trc khi b-tng hoc va, phi c rasch v gi m t. Hn hp b-tng (va) c vo mi ni mt cch lin tc v cm nn cn thn. Mt l ra ngoi ca b-tng (va) phi c m nn tht bng phngngang u vi kt cu cn c ni ghp v trnh khi b bc hi nc trong thi gian bodng (ph lp gi m, ri vt liu ngn cch nh nng..)

6.13. Hn hp cht keo dng vo mi ni phi c lm th nghim trc trong

phng th nghim kim tra cht lng ca thnh phn vt liu. Khi cn thit, phi kimtra Moduyn n hi v h s Poatsng ca keo. D vi hp cht keo tng ng theo yucu ca thit k nh vy, nhng vn phi kim tra thm sc chu ct ca mi ni keo quamu th nghim (mu keo hnh lp phng).

i vi cc mi ni b-tng dng keo dn, phi chn thnh phn cu t thch hpvi iu kin ngoi tri thay i, khi ng dn khng phi dng cch sy nng kao dntrong mi ni.

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6.14. Khi thi cng mi ni, keo c ph u ln hai mt ca kt cu b-tng cnni ghp. Khng c l keo chy tri trn mt ng ca kt cu vto dy lp ph keothch hp, c mi ni keo kht cht khi nn bng trc p n gin ng vin chu vi.

Mi ni keo c nn p trc tip sau khi bi keo ln b mt b-tng cn ni ghptrong mt thi gian ngn tu thuc c tnh cng ngh v bm dnh ca keo. tinhnh nn p mi ni keo, nn p dng mt s ct thp trung gian to ng sut hoc dng

thit b chuyn dng, to nn lc nn p u trn ton mt ct ca mi ni keo t tr sng sut 0,05- 0,2 Mpa (0,5- 2 kgl/cm2).

Trong trng hp cn phi iu chnh mt ct dc v v tr ca kt cu lp t trongmt bng, c s tho thun ca c quan thit k, cho php b sung khng qu 15% khilng keo lm lp chm iu chnh kt cu, nhng chiu dy ln nht mi ni khngqu 5mm.

Trong trng hp dng keo ni ghp cc cu kin ca m tr theo chiu cao, chophp bi keo ln mt mt ca mi ni v keo c nn p ngay trong qu trnh lp t dncc khi lp ln cao.

6.15. Trong qu trnh v sau khi kt thc thi cng lp ghp kt cu (trc khi tho

d vn khun, cht ti tm thi hoc kt thc vic cht ti) cn phi kim tra cng bnca mi ni v i chiu vi thit k theo tng giai on thi cng. Mi trng hp thay ithnh phn hp cht, vt liu lm mi ni v thnh phn keo, cn phi ghi chp y vos nht k thi cng.

6.16. Yu cu k thut thc hin cc mi ni thi cng cu, khi lng v phngphp hoc cch thc kim tra nghim thu trong qu trnh thi cng, c qui nh theo bng10.



1. sai lch cho php v v tr tng. sai lch cho php v v tr tng. sai lch cho php v v tr tng. sai lch cho php v v tr tngquan cc cu kin BTCT c sn, lin ktquan cc cu kin BTCT c sn, lin ktquan cc cu kin BTCT c sn, lin ktquan cc cu kin BTCT c sn, lin ktbng mi ni va bbng mi ni va bbng mi ni va bbng mi ni va b----tng:tng:tng:tng:

a) Sai lch mp ngoi ca cc cu kin nign nhau: 5mm

Cc lin kt o bng thc dt,my ton c hoc

th di.b) Nghing lch ca ng tim tr ng

c chiu cao H (m) so vi v tr thit k mtct nh tr:

Khi H < 4,5m, l 10mm Cc tr ng o kim tra bngmy ton c hoc

th di.H = 4,5m 15m, l 15 nt nt

H > 15m, l 0,001 H nhng khng ln hn35mm

nt nt

c) Sai lch vcao trnh nh tr, ct ng, Cc kt cu o my thu bnh

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tr khung l 10mm

d) Sai s v chiu dy khe ni gia cc cukin c sn:

Vi khe ni hp, dy t 20 n 30mm l 10mm.

Vi khe ni rng, dy t 70mm tr ln, l20mm

Cc khe ni o bng thc dt

2. Dung sai cho php v cc ch tiu hnDung sai cho php v cc ch tiu hnDung sai cho php v cc ch tiu hnDung sai cho php v cc ch tiu hnhp bhp bhp bhp b----tng v va lm mi ni:tng v va lm mi ni:tng v va lm mi ni:tng v va lm mi ni:

nt nt

a) T l nc: xi mngvi hn hp b-tng l 0,35-0,5vi va, khng ln hn 0,45

100%Theo cc tiu chunt TCVN 3105-1993

n TCVN 3111-1993

b) stvi hn hp b-tng l 4-5 cm

vi va, khng ln hn 8 cm

nt nt

3. Cng cho php ca b. Cng cho php ca b. Cng cho php ca b. Cng cho php ca b----tng v vatng v vatng v vatng v vakhi lm mi ni;khi lm mi ni;khi lm mi ni;khi lm mi ni;

a) Trong thi gian nn p trong khun dnkhi lin kt tm thi v tho d vn khun,khng nh hn 15 Mpa (150 kgl/cm2).

b) Trc khi tho d ti trng thi cnghoc ti trng khai thc, cng phi ttng ng tr s qui nh ca thit k i vitng giai on thi cng

4. Cc ch tiu cho php v lin kt ccCc ch tiu cho php v lin kt ccCc ch tiu cho php v lin kt ccCc ch tiu cho php v lin kt cc

cu kin c sn bng keo:cu kin c sn bng keo:cu kin c sn bng keo:cu kin c sn bng keo:a) i vi mi ni dn keo cht kht cchiu dy trung bnh (chn khng t hn 4im o theo chu vi mi ni) khng c lnhn 3mm. Chiu dy ln nht ca mi ni keo nhng im o cc b theo chu vi, cho phpkhng ln hn 5mm.

Tng mi ni Quan st, kim trabng thc cp hocthc dt chnh xc.

b) Mduyn n hi ca keo 1500 MPa(15000 kgl/cm2).

Tng m phitrn keo

Quan st, kim tramu 2x2x8 cm khi tng ng sut0,2-0,4 MPa/s

c) H s Potsng 0,25 nt nt

5. lu ho ca keo 5. lu ho ca keo 5. lu ho ca keo 5. lu ho ca keo(tnh theo gi):Theo cng ngh (thi gian bi keo ln b

mt cn dn), khng t hn 1 gi.

Tng t 20 phtmt ln

Quan st, kim tras sut hin dng

chy t qung cakeo khi nhng athu tinh hay inh

vo .Theo tnh ho cng (thi gian cu kin

c th dnh cht vo nhau khi p) khng t hn4 gi

Tng t qua migi

Quan st, kim tra dnh bm ca keo

qua gng tay

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Phun p v lp y trong ng rnh.

6.17. Vic phun p va xi mng ct vo ng kn v lp y vo rnh h phi do ith chuyn nghip thc hin.

Vic phun p vo ng kn v lp vo rnh h c tin hnh sau khi kt cu lpt xong v a trc tip cc b thp cng cao hoc ton b ct thp d ng lc votrong kt cu. Nu khong thi gian t lc ko xong ct thp n khi phun lp va vo ngrnh vt qu thi hn quy nh ghi trong mc 15 bng 4 th phi c gii php tm thi bov ct thp khi b g (dng np hoc ng chp kn ln u neo, lm l thot khi m ydi ca u neo, nh k a lung kh nng kh vo rnh, dng cht c ch tm thi tomng ph ln ct thp trong ng kn, hoc c th dng xi mng-cadein bc tm thi ln ctthp t trong rnh h..)

6.18. Dung dch va phun p phi c ch bin sn v nho trn trn my chuyn

dng cho nhuyn bm vo kt cu. Khng c trn va phun p bng phng php thcng.

6.19. Trc khi bt u phun p va vo ng khng qu mt ngy, phi bm ync vo xc nh kn ca ng. Nhng ch r r pht hin thy v mp vin ngphi c bt kn ngay sau khi y nc ra khi ng. ng thi dng ng chp lm sn ykht ln neo, nu cu to neo khng c sn cc nt y l bm ny.

Trong trng hp ng khng c kn n mc nh hng n cht lng phunp, Hi ng nghim thu phi a ra gii php khc phc, c s tham gia ca i din cquan t vn Thit k.

6.20. Dung dch va c tin hnh phun p vo trong ng, sau khi bm ync vo ng ny. Khi cc v tr neo ct thp d ng lc t cc cao khc nhau, vicbm y va phi bt u t cc neo nm pha di trc.

Phun p va vo ng c tin hnh lin tc. Trong trng hp hnh thnh Nt btng ng, dng nc bm ra lng ng v phun p va mi thay th. Sau khi ng kn nova cn nt cht l bm va ninh kt tt.

i vi nhng ng c on cong xin hai u, tin hnh nn p va qua ng ni gnvo c 2 u neo. Trong qu trnh phun p va vo ng, va c bm t mt pha u neosang u neo i din l hon tt vic phun p.

6.21. Vic phun p va vo nhng ng t thng ng theo chiu cao ca thn mtr c thc hin theo tng tng cao 20-25m mt on, tng ng vi tng on ct thp

to d ng lc t theo chiu cao ca thn m tr nh thit k quy nh.Phn trn ca cc tng t ng (khng k tng trn cng) trong thn m tr u clp ng ni va thot ra khi bm vo lng ng, va lp tip on ng cho tng trn v bm va tip vo.

T vic bt u phun p va vo ng tng di cng ln n tng trn cng theochiu cao ca thn m tr, ch tin hnh trong thi gian khng qu 5 gi. Ring phn vatrong ng ca tng trn cng phi c nn p cht.

Trc khi lp y va (b-tng) vo rnh h, hai bn vch ca rnh v cc ct thpcng d ng lc phi c lm sch v thi kh kh. Va (b-tng) lp y vo rnh phi

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c m nn cn thn. Trng hp ct thp d ng lc c xp thnh b v t vo mts hng rnh h, vic lp va phi tun theo ch dn ca BVTC. Trn b mt b-tng lprnh c ph lp chng thm nc gm mt s mng ngn p li, hoc lp ph bao ti, bodng m 2-3 ln trong ngy v duy tr trong vng 2 tun l.

6.22. Khi phun p vo ng kn v lp y trong rnh h, phi tin hnh kim tra

thng xuyn cht lng cung cp va (b-tng) v qu trnh p () va (b-tng),kt qukim tra phi ghi vo s nht k thi cng.

6.23. Nhng yu cu k thut khi thi cng phun p v lp y trong ng rnh, khilng cng vic kim tra nghim thu cng nh phng php v cch thc kim tra, cqui nh theo bng 11.



1. Cc ch tiu c trng ca va bm1. Cc ch tiu c trng ca va bm1. Cc ch tiu c trng ca va bm1. Cc ch tiu c trng ca va bma) Tnh lu ng: ngay sau khi va snxut ra, l 40 2 giy.

Va sn xut ra sau 60 pht, l 80 5

Khi c s thay ikp th iu kinvt liu v cng

ngh bm

Theo TCVN, kim traqua mu 10x10x10cm

b) co ngt (gim th tch) khng qu2%

nt Theo TCVN

c) Cng t c sau 7 ngy khngnh hn 20 MPa (200 kgl/cm2) v sau 28ngy, khng nh hn 30 MPa (300 kgl/cm2)

Kim tra trn mu nnth 10x10x10cm

(theo TCVN)2. Vt liu va bm:2. Vt liu va bm:2. Vt liu va bm:2. Vt liu va bm:a) Xi mng poclng (lm b-tng cu

cng) mc 400 hoc cao hn.Khi phi trn vt

liuKim tra theo TCVN

b) Cht ph gia ho do nt ntV kt qu trongphng th nghim

3. Cng ngh phun p3. Cng ngh phun p3. Cng ngh phun p3. Cng ngh phun p:a) p lc lm vic ca my bm va 0,5-

1 MPa (5-10 kgl/cm2)Trong qu trnh

bmQua my p lc k

b) tc lp y va vo ng rnhkhng ln qu 3m/pht

nt Theo di tng gi

c) nn p va trong ng 0,6 0,05 MPa(6 0,5 kgl/cm2)

Trong qu trnhbm

Kim tra bng p lck

d) thi gian nn p, 5 2 pht nt Quan st trn ng he) ng knh l u vi bm khng

nh hn 14mmTrc khi bt u

thi cngo bng thc cp

g) ng knh l u neo hoc kt cu tip nhn va bm vo, khng nh hn16mm.

nt nt

4. Vt liu b4. Vt liu b4. Vt liu b4. Vt liu b----tng (va) dng lp ytng (va) dng lp ytng (va) dng lp ytng (va) dng lp yrnh h:rnh h:rnh h:rnh h:

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Xi mng poclng mc 500 hoc caohn

Khi la chnthnh phn b-tng hoc va

Theo TCVN

5. tch nc ca b5. tch nc ca b5. tch nc ca b5. tch nc ca b----tng (va) trongtng (va) trongtng (va) trongtng (va) trong24 gi khng ln hn 2% th tch24 gi khng ln hn 2% th tch24 gi khng ln hn 2% th tch24 gi khng ln hn 2% th tch

Khi la chnthnh phn b-tng hoc va

Theo TCVN

Ghi ch:Ghi ch:Ghi ch:Ghi ch:Trng hp ng rnh bng kim loi hoc bng nha tng hp, vic phun p v lp

y va c t l N/X ln hn 0,4 c tin hnh bt k ma kh hu trong nm.

Nhng c im thi cng kt cu b-tng ton khi

6.24. Khi la chn loi hnh vn khun pha tun theo cc yu cu quinh ca Tiuchun ngnh Qui trnh thit k cc cng trnh v thit b ph tr thi cng cu.

6.25. Khi la chn gia cng vn khun dng b tng v b tng ct thp lmm tr cu, cn phi xem xt nhng im sau:

- Tnh bin dng ca vn khun v b t (i vi kt cu d ng lc) di tc dngca ni lc nn p;

- Nhng u gc vung v gc nhn ca kt cu b-tng phi gia cng vnkhun vut thnh gc trn bn knh 20mm, hoc phi vt mp theo kch thc khng nhhn 10x10mm (nu trong bn v thit k khng c ch dn khc);

- dc mt bn vn khun ca khi nguyn th l 1 : 20.

6.26. Cng tc nghim thu vn khun nh hnh, ch to sn trong xng, phi tun

theo cc yu cu ca nh my ch to.6.27. Mi cng tc chun b b-tng vo vn khun u phi c ghi nhn vo

bin bn cng tc.

6.28. B mt vn khun tip xc vi b-tng phi c ph lp chng dnh trc khi. Cht chng dnh c ph kn mt lp mng ln b mt vn khun c lm schcn thn.

B mt vn khun sau khi c ph lp chng dnh cn phi gi khng dy bn,nc ma v nh nng mt tri.

Khng cho php lm dy cht chng dnh vo ct thp v cc chi tit k m.Khng cho php s dng cht chng dnh trong c thnh phn gy tc ng xu

cho b-tng.Khng cho php s dng cht hn tp du m thi cng nghip lm cht chng

dnh.

6.29. Cc yu cu k thut cn phi p ng trong gia cng ch to v lp t vnkhun, khi lng cng tc kim tra nghim thu cng nh cch thc kim tra, c quinh theo bng 12. Kt cu vn khun v cc bo m theo ng kch thc ca cc bphn cu (c tnh n vng thi cng) nh trong bn v thit k.

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Yu cu k thutYu cu k thutYu cu k thutYu cu k thut i tng kim trai tng kim trai tng kim trai tng kim tra Cch thc kim traCch thc kim traCch thc kim traCch thc kim tra1. Sai s cho php v v tr v kch thc lpSai s cho php v v tr v kch thc lpSai s cho php v v tr v kch thc lpSai s cho php v v tr v kch thc lp

t vn khun tun theo Tiu chn Vit Nam vt vn khun tun theo Tiu chn Vit Nam vt vn khun tun theo Tiu chn Vit Nam vt vn khun tun theo Tiu chn Vit Nam vTiu chun ngnh v kt cu bTiu chun ngnh v kt cu bTiu chun ngnh v kt cu bTiu chun ngnh v kt cu b----tng v btng v btng v btng v b----tngtngtngtngct thp ton khi.ct thp ton khi.ct thp ton khi.ct thp ton khi.

Mi kt cu vnkhun, kim tratrong qu trnh

lp.

o bng mykinh v, i chiumc cao c v obng thc cun

2. Sai s cho php v khong cch:Sai s cho php v khong cch:Sai s cho php v khong cch:Sai s cho php v khong cch:Gia cc gi ta vn khun ca kt cu chu

un v gia cc im lin kt ca kt cu b tthng ng so vi kch thc thit k, l 25mm-theo 1m chiu di. Khng ln hn 75mm- theoton di.

Tng khongcch

o bng thccun

Vnh phng trn mt phng thng ng hoc

mt nghing ca vn khun theo thit k, giacc ng giao ct, l:5mm- theo 1m chiu cao.20mm- theo ton chiu cao ca mng.10mm- theo ton chiu cao n 5m ca thn

tr v ct.

Tng mt phng o bng thc dt

v dy di

3. Sai lch cho php v v tr tim vn khunSai lch cho php v v tr tim vn khunSai lch cho php v v tr tim vn khunSai lch cho php v v tr tim vn khunso vi thit k l:so vi thit k l:so vi thit k l:so vi thit k l:

15mm- i vi mng8mm- i vi thn tr v mng kiu ct

kt cu thp.

Tng ng tim o bng thccun

4. Sai lch ca khung t kch vi ng timSai lch ca khung t kch vi ng timSai lch ca khung t kch vi ng timSai lch ca khung t kch vi ng timca kch theo ng thng ng: khng choca kch theo ng thng ng: khng choca kch theo ng thng ng: khng choca kch theo ng thng ng: khng chophp c sai lch.php c sai lch.php c sai lch.php c sai lch.

Tng ng timim kch hoc

b t

o bng thc vth di

5. chnh cao ln nht cho php ca dm chnh cao ln nht cho php ca dm chnh cao ln nht cho php ca dm chnh cao ln nht cho php ca dmgnh khung t kch, l 10mmgnh khung t kch, l 10mmgnh khung t kch, l 10mmgnh khung t kch, l 10mm

Cao mi dmgnh

o bng mythu bnh

6. cn cho php ca vn khun trt vi cn cho php ca vn khun trt vi cn cho php ca vn khun trt vi cn cho php ca vn khun trt vimi cnh bn l + 4 vmi cnh bn l + 4 vmi cnh bn l + 4 vmi cnh bn l + 4 v ----2 tnh theo 1 m chiu2 tnh theo 1 m chiu2 tnh theo 1 m chiu2 tnh theo 1 m chiucao.cao.cao.cao.

Tng vn khuntrt

o bng th di

7. cn ngc: khng cho php. cn ngc: khng cho php. cn ngc: khng cho php. cn ngc: khng cho php nt nt8. Khong cch cho php gia kch vKhong cch cho php gia kch vKhong cch cho php gia kch vKhong cch cho php gia kch v

khung t (khng k trng hp khong cchkhung t (khng k trng hp khong cchkhung t (khng k trng hp khong cchkhung t (khng k trng hp khong cchgia cc khung t tu ) l 10mmgia cc khung t tu ) l 10mmgia cc khung t tu ) l 10mmgia cc khung t tu ) l 10mm

Theo thit k o bng thccun

9. Sai lch cho php v ng tim:Sai lch cho php v ng tim:Sai lch cho php v ng tim:Sai lch cho php v ng tim:ca kch so vi ng tim kt cu l 2mm. Tng ng tim nt

ca vn khun c hon v hoc xp t li,so vi ng tim ca cng trnh, l 10mm

nt nt

10. Sai lch cho php v khong cch giaSai lch cho php v khong cch giaSai lch cho php v khong cch giaSai lch cho php v khong cch giacc mt trong vn khun so vi kch thc thitcc mt trong vn khun so vi kch thc thitcc mt trong vn khun so vi kch thc thitcc mt trong vn khun so vi kch thc thitk, l 5mmk, l 5mmk, l 5mmk, l 5mm

Tng vn khun o trn vnkhun hoc sn

phm kt cu utin

11. g gh cc b cho php ca vn g gh cc b cho php ca vn g gh cc b cho php ca vn g gh cc b cho php ca vn nt Quan st bn

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ca tng di ng thi l nn ca tng trn phi c o c cao trnh v i chiu v sais cho php. Khi thc hin thi cng cc mi ni ghp cc khi lp, phi ch trt kn cckhe l h c th gy mt va.

Va b-tng xi mng ct dng trt kn phi c st trong khong 6-9cm.

6.35.Mt ngoi ca cc mi ni ghp khi lp theo vin bao quanh phi c trt

kn bng va xi mng-ct kh t cng 30 MPa (300 kgl/cm 2) v bo qun trnh bnt. Mi ni theo vin bao quanh phi c lm phng mn, cht, dnh kt tt vi b-tng.Khng dng keo dn lm mi ni theo vin bao quanh ny.

6.36. Khi thi cng kt cu c sn ca m tr cu dng ct (nh cu vt cao), phn ca thn ct phi c gi cht tm thi nh b g dng chuyn dng bng thp hockt cu dn hng.

ng lt ct dng nm chn gi phi c a vo n mt na chiu su ca bo m sao cho c th b-tng lin khi cho ct chn v rt nm chn ra. Trongmi trng hp phi c bin php khng cho nc chy vo ng lt ct v mng.

6.37. Trc khi xp t cc khi lp thn m tr v mng, phi gi gn cc khi nykhng b bn.

6.38. Cc yu cu k thut cn phi tun th khi thi cng mng v m tr, khilng cng tc v cch thc kim tra, c qui nh theo bng 14.

BngBngBngBng 14141414

Yu cu k thutYu cu k thutYu cu k thutYu cu k thut i tng kim trai tng kim trai tng kim trai tng kim tra Cch thc kim traCch thc kim traCch thc kim traCch thc kim tra1. lch dch cho php:1. lch dch cho php:1. lch dch cho php:1. lch dch cho php:cc mp bin ca khi lp c sn lin k

lm thn m tr l 5mm.

Tng hai khi link

o bng thc

2. Sai s cho php:2. Sai s cho php:2. Sai s cho php:2. Sai s cho php:v chiu dy khe ni t thn m tr,

to thnh t cc mp ca khi lp, l 5mm.La chn ch nghi

ngnt

v ng tim cc khi lp mng v mtr, lin kt bng cc khe ni t

l 5mm- theo chiu caol 10mm theo cc kch thc khc cn

li

La chn ch nghing

o bng thc

3. dy cho php ca mi ni3. dy cho php ca mi ni3. dy cho php ca mi ni3. dy cho php ca mi nithn mtr bng cc khi lp, vi mi ni l keo dn,tun theo im 4-5 ca bng 9.

Xem im 4-5bng 9

Xem im 4-5bng 9

4. Sai lch cho php ca4. Sai lch cho php ca4. Sai lch cho php ca4. Sai lch cho php cacc ng timcc ng timcc ng timcc ng timto thnh theo chiu cao kt cu m tr:to thnh theo chiu cao kt cu m tr:to thnh theo chiu cao kt cu m tr:to thnh theo chiu cao kt cu m tr:

Khi dng mi ni keo dn, tnh theo nv chiu cao H, l 1/250.

Tng thn m tr Dng my kinh vv cao c quan

st

Khi dng mi ni t, khng ln hn20mm

nt o bng thc

5. Hn hp b5. Hn hp b5. Hn hp b5. Hn hp b----tng dng vo lngtng dng vo lngtng dng vo lngtng dng vo lngm tr:m tr:m tr:m tr:

Tng tr m Kim tra t mub-tng chn.

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thnh phn xi mng khng nhiu qu 350kg/m3.

T l N/X khng qu 0,5. nt ntChiu dy ca mi lp ri khng ln hn

300mmTng tr m o bng thc

1. Sai s cho php v v tr tim kt cu:Sai s cho php v v tr tim kt cu:Sai s cho php v v tr tim kt cu:Sai s cho php v v tr tim kt cu:

khi thi cng so vi ng tim m trtheo mt bng o c trn ton mng

i vi tim cc, cc ng, ct theo mtbng, cao trnh mt di i cc, l 30mm

Tu chn ch nghi

ng

nt

i vi tim tr , ct tr , cao trnhmt nh, l 5mm.

Tu chn ch nghing

o bng thc

7. Sai s cho php v cao tr7. Sai s cho php v cao tr7. Sai s cho php v cao tr7. Sai s cho php v cao trnh thit knh thit knh thit knh thit knh cc ccnh cc ccnh cc ccnh cc cc(cc ng, cc ng, cc khoan)so vi mt di ca i cc, l 50mm

nt nt

8. Khe h nh nht cho php:8. Khe h nh nht cho php:8. Khe h nh nht cho php:8. Khe h nh nht cho php: gia mtbn kt cu cc, ct tr vi mt bn ca l

cha sn trn i cc, l 30mm.

nt nt

Thi cng xy lp cng

6.39. Cc khi c sn lm mng ng cng c lp t trc tip trn nn ngay saukhi nghim thu h mng, nn t mng cng c thi cng theo ng dc dc thit kv vng xy dng qui nh.

Cc khi lp c t theo tng on mng theo hng t ca ra cng ln dn nca vo cng. Mi khi hoc mi hng khi lp trong phm vi mt on mng phi t phhp vi thit k v thng hng theo mt mt phng ca mng lm chun. Cc khi lp saukhi lm sch mt ngoi, phi c t theo ng v tr thit k trn mt lp va xi mng

ri mt; khng cho php trt va b sung vo di khi c lp t, cng nh vic xdch khi c sau khi va ninh kt. chnh cao khi lp trong mt hng khng cvt qu 10mm.

Mt dc ch ghp ni phn h o su nht ca mng tng u vi mt nn camng thn cng phi c lp y bng ct- dm hoc hn hp ct- xi mng, m chttheo tng lp v ri va xi mng ln.

6.40. Khe ni ng ca mi hng khi c phi c lp y va ct- xi mng, cnhngoi khe ni ng cng trt kn mt vi cc khi tip gip nhau.

Khi va khe ni mt ngoi ninh kt th khng c trt thm vo mch ni.

6.41. Cng kiu ng thp tn ln sng c sp xp v lp t ti v tr thit k sau

khi nghim thu phn t nn lm mng cng.

6.42. Khi thi cng cng, cn phi thc hin cc yu cu sau:a) u cng ca ra c thi cng trc khi lp t cc on thn cng.b) Khi lp t cc t cng trn phi m bo lp b-tng m di cc t cng

t dc thit k v c gc vt sao cho tip xc cht kht vi b mt ng cng pha ditheo sut chiu di thn cng.

c) Lp t cc t cng vung gc hoc t cng ta trn mt , phi dng va c st 6-8 cm lm lp m.

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d) Khi t cc on cng bng thp tn ln sng phi dng b g nh hnh baogi pha di khng thp hn 1/3 mt ct ngang ng, hoc phi to mt nn san rt bngphng sau nm t ct hai bn thnh ng rt cn thn ng thi m nn k n caotrn 1/3 mt ct ngang ng.

e) Vic lp rp cc ng tn ln sng phi m bo sao cho gia m bulng, ai c,vng m vi bn tn thp khng c dnh ht t.

6.43. Vic kim tra nghim thu lp t cng phi c tin hnh trc khi lp t cghi bin bn.

6.44. Cc ch tiu k thut cn thc hin trong thi cng xy dng cng, khi lngv cch thc kim tra c qui nh theo bng 15.


Yu cu k thutYu cu k thutYu cu k thutYu cu k thut i tng kim trai tng kim trai tng kim trai tng kim tra Cch thc kim traCch thc kim traCch thc kim traCch thc kim tra1. Sai s cho php v v tr thi cng lp t1. Sai s cho php v v tr thi cng lp t1. Sai s cho php v v tr thi cng lp t1. Sai s cho php v v tr thi cng lp t

cc cu kin ca cng:cc cu kin ca cng:cc cu kin ca cng:cc cu kin ca cng:Bc chnh cc khi c lm mng trong cc

hng khng cao qu 10mm.Tng mp chnh

khi cDng thc o

Chiu di v chiu rng ca cc on mng,l + 2 v -1cm.

Tng on mng Dng thc o

x dch tng i ca cc cu kin b-tng v BTCT lin k, l 10mm.

Tng cu kin nt

Khe h gia cc on mng v cc t cng(theo ch s thit k), l 5mm.

Tng khe h nt

ng tim dc cng theo mt bng v mtct dc (vi iu kin khng c on ng

nc), l 30mm

Tng cng Dng my thubnh v da vo

bnh .2. Cng bn ch2. Cng bn ch2. Cng bn ch2. Cng bn cho php ca lp va ct xio php ca lp va ct xio php ca lp va ct xio php ca lp va ct ximng:mng:mng:mng:

Khi xy cc khi lp mng, dng cp vatheo quy nh ca thit k nhng khng nh hn20 MPa.

T l N/X khng ln hn 0,65

Tng th tch va mt mng

Theo TCVN

3. st cho php ca va ct3. st cho php ca va ct3. st cho php ca va ct3. st cho php ca va ct ---- xi mng:xi mng:xi mng:xi mng:Dng cho san nn di y ca hng khi

lp mng di cng v dng cho khe ni ngang,l 6-8cm, theo phng php hnh nn ct.

nt nt

Nh trn cho khe ni ng l 11-13cm. nt nt

Nh trn, cho khe ni ph ngoi, l 2-3cm nt nt

Ghi ch:Ghi ch:Ghi ch:Ghi ch:Khe h gia cc t cng v cc on mng cng phi trong mt mt phng.

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Lp t kt cu nhp

6.45. Trc khi thi cng lp t kt cu nhp, h thng cn cu nng chuyn cc loia n cng trng u phi qua kim nh v nh gi cht lng. Hot ng ca ccmy cu trn nn t p ch c php tin hnh sau khi t ti y m nn cht phhp vi yu cu ca BVTC.

6.46. Cc loi cu kiu cnh hng v kiu khung cng t trn ng ray, khi vnhnh, phi c n v chuyn ngnh qun l ng st cho php. ng ray my cu dichuyn phi ph hp tiu chun lp t hin hnh.

6.47. Khi nng, h v di chuyn kt cu nhp (dm) phi:- m bo sao cho qu trnh nng v h theo phng thng ng; khng c dng

ti ng thi no cng kt cu;- m bo khe h gia mt di ca kt cu lp t vi nh ray hoc mt t khng

nh hn 0,2m;- m bo sao cho cn vi ch hot ng trong phm vi nh trc ca n BVTC.

6.48. Trc khi tin hnh lp t kt cu nhp v cc dm ring r bng my cukiu hng chy trn ng ray qua cc tr , phi:

a) Kim tra trc nn ng p cho my qua li, tnh trng ng, cng bn v n nh vn c ca kt cu cn lp t, v quan st phm vi gii hn bi cc kin trcxung quanh my cu nng ti c th a lt vo;

b) m bo sao cho vic qua li ca my cu trn cc ng ray k tip nhau mkhng b st mt in p trong li in cung cp.

6.49. Trnh t di chuyn my cu cc loi trn cng trng lp t kt cu nhpphi c xc nh trc trong h s BVTC.

6.50. Trong trng hp cng mt lc dng hai cn cu vi tin hnh mt cngvic, cn thc hin mt cch nghim ngt cc qui nh ca BVTC, di s ch o thngnht ca ngi chu trch nhim v an ton lao ng trn cng trng. Trong h s BVTCphi xc nh r trnh t vn hnh (nng cu, thay i chiu cao, gc quay) cho mi cn cuvi, s cp treo v ng di chuyn c xt n ti trng trn my cu v sc nng ti.

6.51. Cc yu cu k thut cn tun th trong thi cng lp t kt cu nhp, khi vcch thc kim tra theo qui nh trong bng 16.


Yu cu k thutYu cu k thutYu cu k thutYu cu k thut i tng kim trai tng kim trai tng kim trai tng kim tra Cch thc kim traCch thc kim traCch thc kim traCch thc kim tra1. Tim dc theo mt bng ca kt cu nhpTim dc theo mt bng ca kt cu nhpTim dc theo mt bng ca kt cu nhpTim dc theo mt bng ca kt cu nhp

(hoc dm) ng st so vi ng tim camng o c, l 10mm.

Mi phin dmv kt cu nhp

o bng mykinh v da vomng tam gic

c

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2. Nh trn, nhng kt cu nhpNh trn, nhng kt cu nhpNh trn, nhng kt cu nhpNh trn, nhng kt cu nhp(hoc dm)ng b, l 0,0005 L (L- chiu di nhp) nhngkhng ln hn 50mm.

Mi phin dmv kt cu nhp

o bng mykinh v da vomng tam gic

c3. Nh trn, nhng kt cu nhp bng g, lNh trn, nhng kt cu nhp bng g, lNh trn, nhng kt cu nhp bng g, lNh trn, nhng kt cu nhp bng g, l

20mm.20mm.20mm.20mm.nt nt

4. ng tim dmng tim dmng tim dmng tim dm thi cng lp t trnkt cu nhp l 15mm.

nt nt

Vic nng v h kt cu nhp.

6.52. Vic nng v h kt cu nhp bng h thng kch, bng cc loi my nng yhoc h bng cc hp hnh tr trn, c p dng trong iu kin khng th dng my cumt cch thun li c. Khi nng kt cu nhp phi bo m t th lun n nh v titrng phn b trn mi my nng lun ng u trn im ta. Khi nng (h) kt cu nhpbng h thng kch phi kim tra n nh ca kt cu trong trng hp chu tc ngng thi ca ti trng ngang do lc g

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