So Tay Ky Thuat Thi Cong Cong Trinh Cap Nuoc

1

04.2012

d

S TAY

K THUT THI CNG

CNG TRNH CP NC

2012

TNG CNG TY CP NC SI GN

TRCH NHIM HU HN MT THNH VIN

06/06/2012

Bin son ln th I

S tay K thut Thi cng Cng trnh Cp nc (v.1)

2

Y BAN NHN DN THNH PH H CH MINH



S TAY

K THUT THI CNG CNG TRNH CP NC



PHNG K THUT CNG NGH

TP. H CH MINH THNG 06 NM 2012


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LI NI U

Hin nay, cng tc hng dn, o to chuyn mn v k thut thi cng cc

cng trnh cp nc ang da trn nhiu ngun ti liu ri rc, cha c h thng

ha mt cch khoa hc v thiu nhiu hnh nh minh ha hc vin c th tip thu

mt cch trc quan sinh ng. T nguyn nhn , Tng Cng ty Cp nc Si

Gn t chc bin son li Ti liu hng dn k thut thi cng cng trnh cp

nc.

Ti liu ny c xy dng trn c s cc ti liu, phng php k thut

ang c Tng Cng ty ang p dng kt hp vi nhng ti liu k thut, nhng

kinh nghim hc tp c t cc n v chuyn ngnh trong v ngoi nc v

ang p dng hiu qu. Ti liu c xy dng ph hp vi tnh hnh thc t t

chc thi cng trn a bn Thnh ph H Ch Minh v cc n v u c th d

dng p dng nhm t c s bi bn trong qu trnh thc hin cc cng trnh cp

nc, t giai on lu tr, vn chuyn ng n qu trnh thi cng v ti lp mt

ng, hon tr li giao thng, v.v Nhng ni dung c nu trong ti liu hng

dn k thut thi cng khng mi, tuy nhin cc ni dung ny c bin tp vi

cch trnh by d hiu vi nhiu hnh nh minh ha, gip ngi xem tip cn vi ti

liu d dng, trc quan sinh ng.

Tng Cng ty Cp nc Si Gn hy vng rng ti liu hng dn ny s gp

phn nng cao hn na cht lng thi cng cc cng trnh cp nc. Chng ti rt

mong nhn c nhng kin nhn xt, ng gp ca cc n v, Phng ban

chuyn mn tip tc hon thin ti liu v hng n p dng rng ri khng ch

i vi cc cng trnh cp nc trn a bn Thnh ph H Ch Minh m cn cc

tnh bn.

Mi kin ng gp xin gi v:

Phng K thut Cng ngh - Tng Cng ty Cp nc Si Gn

+ a ch: S 1 Cng trng Quc t, Phng 6, Qun 3, Tp HCM

+ T: +84.38227426 + Fax: +84.38279268

+ Email: [email protected], [email protected].

[email protected], [email protected].

[email protected], [email protected].


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MC LC Phn I. K hiu trn bn v mng li cp nc. Symbol drawing of water

supply network. ........................................................................................... 9

I. K hiu tuyn cng trnh (Symbol) ............................................................... 9 II. K hiu cc chi tit ni ng (Symbol details) ................................................ 9 III. K hiu van (Valve symbol) ......................................................................... 10 IV. Cc chi tit khc (Other details) ................................................................. 10

1.B cha, thy i (Reservoir, Tanks) ..................................................... 10

2.Bm (Pump) ............................................................................................ 11

3.Cc chi tit khc (Other details) ............................................................. 12

Phn II. K thut o mng Technical digging trenchs................................... 13

I. Cc nguyn tc chung (Principle) ............................................................... 13 II. Trnh t thc hin (Order of execution) ...................................................... 13

1.Chun b mt bng (Ground preparation) .............................................. 13

2.Ct mt ng (Cut the tarmac) ............................................................. 13

3.K thut o mng ng (Technical digging trenchs) ........................... 14

3.1. o th cng (Digging manual) .................................................... 14 3.2. o c gii (Mechanical digging) ............................................... 14

4.Cch o mng (Digging trenchs) ....................................................... 15

5.Chng mng o (Resist digging trenchs) ...................................... 16

6.Cc cch thi cng gin gio (Construction scaffolding) ......................... 17

Phn III.Vn chuyn v bo qun ng ti cng trng . Transportation and storage pipes in site ................................................................................... 18

I. Vn chuyn v tp kt ng ti cng trng (Transportation and gathering in site) .......................................................................................................... 18

II. Mt s phng trong qu trnh vn chuyn ng (General Precautions) . 20

1.Cu ng (Lifting) ..................................................................................... 20

2.S dng cc mc (Use of hooks) ............................................................ 20

III. u tr (Storage) ......................................................................................... 21

1.ng Gang (Cast Iron pipe) ..................................................................... 21

2.ng nha uPVC (uPVC) ......................................................................... 22

IV. Bo qun (Storage conditions) .................................................................... 22

Phn IV.Thi cng lp t ng. Construction and istallation of pipes ................. 25

I. p t ng gang do (Ductile iron pipe installation) ................................ 25

1.Xung ng vo phui o (Laying) .......................................................... 25

2.V sinh mi ni (Clean) .......................................................................... 25

3.Lp joint vo mi ni (Position the gasket) ............................................ 25


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4.nh du su thc (Mark the socket depth) ....................................... 26

5.Tra m bi trn vo mi ni (Lubricate) ................................................ 26

6.Lp rp u ni ng (Assemble) ............................................................. 27

7.Kim tra mi ni (Check) ....................................................................... 27

8. b tng canh chn ti mi ni (Anchor blocks) ................................ 27

9.Mt s bin php thi cng ng Gang (Pipe laying equipment) .............. 28

9.1. Dng x beng (Crowbar) .............................................................. 28

9.2. Dng gu ca xe o (Asembly using digger bucket) ................... 29 9.3. Dng ti c kh (Mechanical winches) ......................................... 29

II. Hng dn thi cng lp t ng HDPE (Bng phng php hn) (HDPE pipe installation guide (By the method of welding) .................................... 31

1.Mt s vn cn lu (Some issues to note) ....................................... 31

2.Cng tc chun b trc khi hn (Preparation before welding) ............. 31

3.Thi cng hn ng. (Welded construction) ............................................... 32

3.1. Vt ng (Chamfer pipe) ................................................................. 32 3.2. Hn ng (Welded pipes) ................................................................ 33 3.3. Kim tra mi hn (bng mt) (Weld inspection (by eye)) ............. 33

III. K thut thi cng ng PVC (PVC pipe construction engineering) ............. 35

1.Hng dn lp t (Installation Instruction) .......................................... 35

2.Mt s lu c bit (A number of special note) ................................... 36

1.1. Trng hp 1 (Cho c ng 100 200mm) (Case 1 (DN 100 200mm)) ......................................................................................... 36

1.2. Trng hp 2 (Cho c ng 21 50mm) (Case 2 (DN 21 50mm)) ..................................................................................................... 38

IV. p t ng cp nc uPVC (Installation uPVC pipes) ............................. 40

1.Chun b cng c (Preparation tool) ...................................................... 40

2.Lp t (Installation) .............................................................................. 41

Phn V. Ti lp Re established ........................................................................... 44

I. p mng o (Filled the trench) ............................................................. 44 II. Hon tr mt ng (Backfilling and tarred) ............................................. 45

Phn VI.Phng php lp bulong. Bolt tightening method ................................ 51

I. Tiu chun p dng (Standard Application) .............................................. 51

1.Trnh t cng tc lp bu-lng c thc hin nh sau ........................... 51

Phn VII.Bc ph ng bng ti nha PE Polyethylene sleeving ......................... 54

I. iu kin p dng (Conditions of use) ....................................................... 54 II. c tnh k thut (Technical characteristics) ............................................. 54

1.Tin trnh lp t (Installation process) ................................................. 54


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Phn VIII.Sa cha ng b tng tin p c nng thp. Repair prestressed concrete cylinder pipe. .............................................................................. 59

I. B sa cha khn cp (Emergency Replacement kit) ................................. 59 II. Hn sa mi ni (Welded repair joint) ....................................................... 63 III. Sa cha khn cp bng king p (Emergrncy repair saddle) .................. 63

Phn IX.. Mt s phng php lm sch ang c p dng hin nay. Flushing methods are being applied ........................................................................ 64

I. Sc x thng thng (normanlly) .............................................................. 64

1.Nguyn tc thc hin (Principle) ............................................................ 64

2.C s tnh ton: (Foundation) ............................................................... 65

3.Yu cu trong qu trnh thc hin (Required in the flushing procedure) ...

....................................................................................................... 66

4.Mt s hn ch v phm vi p dng (Field of application) .................... 66

II. m sch bng phng php polypigs (Cleaning by polypigs) .................. 68

1.Khi nim (Concept) ............................................................................... 68

2.Yu cu trong qu trnh thc hin (Required of the flushing procedure) ...

....................................................................................................... 69

3.Phng php thc hin (Method) .......................................................... 69

4.Phm vi p dng v hn ch (Field of application and restriction) ....... 70

4.1. Phm vi p dng (Field of application) ........................................ 70 4.2. Hn ch (Restriction) ..................................................................... 71

5. u im (Advantages) ........................................................................ 71

Phn X. Ct t khng ng nc bng my khoan CL-12. Cut tee and do not close the water ........................................................................................... 72

I. Thit b khoan C -12 (Equipment) ............................................................. 72 II. Cc bc chun b v vn hnh my khoan C -12 (Steps in preparing and

operation) .................................................................................................... 72

Phn XI.... Cch bm ch ng h nc D15 25 mm. Menthod of sealing water meter D15mm 25mm .............................................................................. 84

I. Chun b (Prepare) ...................................................................................... 84 II. Cc bc thc hin bm ch (Steps of the press lead) ................................ 84

1.Bm ch cho loi ng ngnh OD 25mm (Press lead for pipe industry OD

25mm).................................................................................................. 84

2.Bm ch cho ng ngnh OD27(Press lead for pipe industry OD 25mm) ...

....................................................................................................... 85

III. Mt s lu (Notes) .................................................................................... 87

1.X dy ng vo thn ng h nc (Thread the wire into the meter

body).................................................................................................... 87


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2.Kim tra ch sau khi bm (Check lead after press) ................................ 87

Phn XII.Sa cha ng gang do. Repair ductile iron. ....................................... 88

I. Ct ng (Cutting of Pipe) .......................................................................... 88

1.Kim tra (Inspection) ............................................................................. 88

2.Cc dng c v thit b (Tools and equipment) ..................................... 88

3.Bc thc hin (Procedure) ................................................................... 89

II. Sa cha phn u ng b mp (Correction of Deformed Spigot) ............. 91

1.Kim tra (Inspection) .............................................................................. 91

2.Dng c v vt liu (Tools and equipment). ........................................... 91

3.Phng thc (Procedure) ....................................................................... 92

III. Sa cha vt nt, nhng bin dng (large cracks, deformation of pipe body is expected) .................................................................................................. 94


2.Thao tc (Procedure) .............................................................................. 95

IV. Mnh v nh (chip) ..................................................................................... 97

1.Dng cu v thit b (Tools and equipment) ............................................ 97

2.Kim tra ( Inspection) ............................................................................. 97

3.Quy trnh (Procedure) ............................................................................ 97

V. p v ln (Break) ...................................................................................... 99

1.Cc thit b phc vc cho cng tc sa sa. Nn dng cc cng c (Tools

and convenience of the repair work, use of the following tools is

recommended) ..................................................................................... 99


3.Quy trnh (Procedure) ............................................................................ 99

VI. Sa cha lp ph ngoi (Repair of External Coating) ............................. 101

1.Dng c, thit b (Tools and equipment) .............................................. 101

2.Phng thc (Procedure) ..................................................................... 102

Phn XIII.Hng dn s dng cc thit b o Manual measuring devices ...... 103

I. Panme (Micrometre) ................................................................................. 103

1.c im (Characteristics) ................................................................... 103

2.Cch o (Measuring) ............................................................................ 103

3.Cch c tr s o (Indicator reading) ................................................. 104

II. Thc cp (Calipers) ................................................................................ 105

1.c im (Characteristic) .................................................................... 105

2.Phn loi (Sort) ..................................................................................... 105


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III. ng h s o cng cao su (The Durometer (A rubber hardness tester) ................................................................................................................... 107

1.c im v cng dng (Characteristics and use) ............................... 107

2.Gii thiu hai loi ng h so thng dng v cc thng s c bn

(Introduce the Durometer and Technical Specification) .................. 107

2.1. ng h c (Mechanical rubber hardness tester) ...................... 108 2.2. ng h hin th in t (Electron rubber hardness tester) ....... 108

3.Cc dng ng h so o cng thng gp (The measuring

instruments the Durometer) .............................................................. 108

IV. My o b dy sn ph (Coating Thickness gages) .................................. 109

1.c im v cng dng (Characteristics and use) ............................... 109

2.Gii thiu mt s my o b dy sn ph v cc thng s c bn

(Introduce Coating Thickness gages and Technical Specification) . 109

V. Thc cn bng thy (Niveau) .................................................................. 110

1.c im, cng dng v nguyn tc hot ng (Characteristics, purpose

and principle of operation) ............................................................... 110

2.Cch nhn dng niveau cn bng hay khng cn bng (Ways to identify

neveau is balance or imbalance). ..................................................... 111

VI. Compa o ngoi (Calipers). ...................................................................... 112 VII.Compa o trong (Inside caliper). ............................................................. 112 VIII.Thc o chu vi (Circumference Tap). .................................................. 112

Ph lc 1.Tht thot nc do vi nc b hng. ..................................................... 113 Ph lc 2.Kim tra r r trong nh bng ng h nc. .......................................... 114 Ph lc 3.Hnh vi nghim cm trong s dng nc. .............................................. 115 Ph lc 4.Du hiu h thng cp nc trong nh c r r. ...................................... 116 Ph lc 5.Tit kim nc ............................................................................ 117 Ph lc 6.Nc khng doanh thu ............................................................... 118 Phn XIV.Ti liu tham kho (References) ........................................................ 119


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Phn I. K hiu trn bn v mng li cp nc. Symbol drawing of water supply network.

I. K hiu tuyn cng trnh (Symbol):

1. Tuyn ng cp nc (Water supply pipeline):

2. Cc tuyn cng trnh khc (Other lines):

II. K hiu cc chi tit ni ng (Symbol details):


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III. K hiu van (Valve symbol):

IV. Cc chi tit khc (Other details):

1. B cha, thy i (Reservoir, Tanks):


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2. Bm (Pump):


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3. Cc chi tit khc (Other details):


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Phn II. K thut o mng Technical digging trenchs.

I. Cc nguyn tc chung (Principle):

Khng nn o mng qu rng hoc hp hn kch thc theo thit kt v nu rng gy lng ph vt liu v nhn cng, nu hp s gy kh khn trong thao tc lp t ng v ph tng. Do not dig trenchs too wide or narrower than the size allowed for if wide

it will wasting materials and labor, if narrow will cause difficulties in

manipulating pipe and fittings installed.

Mng o phi bng phng. Digging trenchs must be flat.

II. Trnh t thc hin (Order of execution):

1. Chun b mt bng (Ground preparation):

B tr tng mt bng thi cng da trn tng mt bng xy dng bn v thit k k thut thi cng, trnh t thi cng cc hng mc ra. General arrangement of space construction based on the general ground

construction engineering design drawings of construction, the

construction sequence items out.

Ch n cc yu cu v cc quy nh v an ton thi cng, v sinh mi trng, chng bi, chng n, chng chy, an ninh, m bo khng gy nh hng n hot ng ca cc khu vc xung quanh bng h thng ro chn, bin bo theo quy nh Pay attention to the requirements and safety regulations on construction,

environmental sanitation, dust, noise, fire, security, guaranteed not to

affect operation of the surrounding areas with system barrier system,

warning signs in accordance with ...

nh du phui o. Mark digging

2. Ct mt ng (Cut the tarmac):


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3. K thut o mng ng (Technical digging trenchs):

3.1. o th cng (Digging manual):

Phm vi p dng: p dng i vi nhng cng trnh nh (lp t ng ngnh..), phm vi thi cng cht hp, khng c mt bng vn hnh xe o. Scope of application: apply to small works (installation of branch

pipes ..), the narrow scope of construction, there is no ground to

dig manually operated vehicles

Dng c thi cng (Tools):

+ i vi t cp 2, 3: dng cuc chim, x beng. With ground level 2, 3: use manderel, crowbar

+ i vi t cp 1: dng v, len, xng With ground level 1: use shovel

Cch o (Digging):

+ Dng cp chim, x beng o ph v lp p cp 2,3 theo tng lp 0,2 m trnh ri tr li mung o v t trng ni thao tc thi cng lp t ng v ngi di chuyn. Use manderel, crowbar crowbars to break the cable 2

and 3, each 0.2 m layer to avoid falling back into spoon

digging operations and vacant land where construction

and installation of pipe and move

3.2. o c gii (Mechanical digging):


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Phm vi p dng: i vi nhng phui o c quy m ln, m bo mt bng. Scope of application: For large-scale expose

ensure ground

Thit b (Equipment):

Xe o (Excavator)

4. Cch o mng (Digging trenchs):

+ Mng o phi o ng su quy nh theo thit k, nu mng o su hn thit k cho php phi lp li bng t mn hoc ct n su quy nh, ti nc m k trnh b ln lm lch tuyn ng. Digging trenchs must dug to the correct

depth specified by design, if digging deeper

trenchs designed to allow to fill them with

fine soil or sand to a depth regulations,

dress carefully watered to avoid skewing the

pipelines subsidence.

+ y mng o phi c dn dp sch s, bng phng. Ti cc v tr u ni ng, mi ni, phi o su hn y mng 0,1m ton b thn ng c tip xc trn y mng. Bottom digging trenchs must be clean, flat.

At the positions of fittings, joints, to dig

deeper trench bottom 0,1 m to the entire

body is exposed on the bottom of the pipe

trench.

+ Mng c lm chm th o su hn v lp li bng ct cho bng phng. A rocky trench digging deeper and then

filled up with sand flat.


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+ B rng mng o phi o ng b rng thit k quy nh. Trong trng hp thit k khng ng quy nh, b rng y mng o c tnh theo cng thc: 2 x 150 +d. Correct width to dig trenchs width design

rules. In case of improper design, the bottom

width of trench dug by the formula: 2 x 150

+ d.

+ B rng mt mng o c th ni rng hn y mng to dc cho vch mng o trnh st l. Width of trench digging may extend over the

bottom of trench to dig ditches for wall slope

to avoid erosion.

+ u (Note):

Trong trng hp mng o nm di mch nc ngm hoc ngp nc ma phi c bin php che chn trnh st l v dng bm ht nc cho kh ro mng o. Nu t y mng o do ngp nc b nho, phi vt sch lp t nho v lp li bng c m k, bng phng trc khi lp ng. In the case of ditches dug beneath groundwater or storm water

flooding should take measures to shielding measures to avoid

erosion and water pump used for digging ditches dry, If the soil

dug trench bottom is wet due to flooding, dredging clean backfill

soil in both wet and compacted carefully before install tube.

Trong trng hp nn t yu c th st l phi c bin php che chn vch mng o cn thn trong sut thi gian thi cng. In the case of soft soil can erosion to take measures to shield

walls and ditches dug carefully during construction.

5. Chng mng o (Resist digging trenchs):

Cc yu cu chung (General requirements): m bo an ton lao ng trong sut qu trnh thi cng o mng phi lm gin do chng mng o trnh st l, th gin do chng mng o cn: (To ensure safety during construction excavation time digging trenchs

must resist digging trenchs to avoid erosion, the excavation time digging

trenchs to support):

+ p rp nhanh chng (Quick assembly). + m bo kh nng chu lc. (Make sure the bearing capacity). + Tho g d dng sau khi thc hin cng trnh xong. (Remove easily

after performing finish work).

+ m bo khong trng cn thit trong khu vc thi cng lp rp ng.(Make sure the space of need in the area of construction tube assembly).


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6. Cc cch thi cng gin gio (Construction scaffolding):

C nhiu cch thi cng gin gio chng mng o nhng ph bin s dng 2 cch sau (There are many ways of construction scaffolding prop digging trenchs but commonly used 2 ways).

+ t vn ngang (Horizontal boards placed).

u im: p vn nhanh chng. Advantages: Insert the board quickly.

Khuyt im:Kh tho d khi hon tt cng tc. Defect: Difficult dismantling when

finishing work.

+ t vn ng (Vertical boards placed):

u im: D thi cng v tho d khi hon tt cng tc. Advantages:Ease of construction and dismantling when

complete the work .

Khuyt im: Hao tn vt liu nhiu hn kiu lp vn ngang. Defect: Consuming more material

horizontal board mounting type.


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Phn III. Vn chuyn v bo qun ng ti cng trng . Transportation and storage pipes in site.

I. Vn chuyn v tp kt ng ti cng trng (Transportation and gathering in site):

1. Cu ng (Lifting):

2. Xung ng bng th cng (Lifting by hand).

+ S dng dy cp kim loi hoc dy nylon (Use of wire rope or nylon sling).

+ nng ng ng cch nn ch cc dy cp phi m bo s cn bng khng c s xut (Enrure the load of pipe and fittings is correctly balanced so that wire rope or nylon sling does not slip out).

ng: Khi s dng dy kim loi. Cn t mt ming m bo v b mt ng. Khng c nng ng ch bng mt si dy. Ming m nn s dng loi cao su tt.(Pipe: Use of wire rope.


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Place cushion pads to protect pipe surface. Do not lift pipe with

single rope. With rubber is highly recommended).

Ph tng: ngh s dng dy cp c bc ming cao su. V tr c ming cao su trch nhng ch c g trn ph tng.(Fittings: Use of nylon sling is highly recommended.

Place rubber pieces to avoid rapid abrasion of nylon sling).

3. S dng cc mc (Use of hooks):

+ Khi s dng cc mc. Cn thn khng cc lp va bn trong b h (When using hooks, be careful not to damage the pipe or lining).

+ Mc cn c ming bc bng cao su.(Cover hooks with rubber pieces).

+ Khng cc u nhn ca mc lm h hng lp va ca ng (Make sure sharp point of hook does not damage the lining).


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II. Mt s phng trong qu trnh vn chuyn ng (General Precautions)

1. Cu ng (Lifting).

S dng dy cp kim loi hoc dy nylon. Use of wire rope or nylon sling.

nng ng ng cch nn ch cc dy cp phi m bo s cn bng khng c s xut Enrure the load of pipe and fittings is correctly

balanced so that wire rope or nylon sling does

not slip out.

ng: Khi s dng dy kim loi. Cn t mt ming m bo v b mt ng. Khng c nng ng ch bng mt si dy. Ming m nn s dng loi cao su tt. Pipe: Use of wire rope. Place cushion pads to

protect pipe surface. Do not lift pipe with single

rope. With rubber is highly recommended.

Ph tng: ngh s dng dy cp c bc ming cao su. V tr c ming cao su trch nhng ch c g trn ph tng. Fittings: Use of nylon sling is highly

recommended. Place rubber pieces to avoid

rapid abrasion of nylon sling

2. S dng cc mc (Use of hooks)

Khi s dng cc mc. Cn thn khng cc lp va bn trong b h. Mc cn c ming bc bng cao su. When using hooks, be careful not to damage

the pipe or lining.

Cover hooks with rubber pieces.


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Khng cc u nhn ca mc lm h hng lp va ca ng. Make sure sharp point of hook does not

damage the lining.

III. Lu tr (Storage): 1. ng Gang (Cast Iron pipe).

u tr s lp ti a cho mt kiu sp xp (i vi ng Class K9). Storage class for a maximum of arrangement (for pipes Class K9).

DNG SP XP ARRANGEMENT

C NG (Diamater)

100 150 200 250 300 350 400 450 500 600 700 800 900 1000 Hnh Thp

(TH.1)LOW 58 40 31 25 21 18 16 14 12 10 7 6 5 3

Dng chun (TH.2,3)

STANDARD

27 22 18 16 14 12 11 10 8 7 5 4 4 3


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2. ng nha uPVC (uPVC):

ng nong u phi c xp ng cch trong khi vn chuyn hoc lu kho. Install belled pipe must be arranged

correctly in transport or store.

Nguyn tc xp ng : Arrangement metheds :

+ Cc u ng nong khng c chm vo nhau (xem hnh chp). The belled pipe ends must not touch

together.

+ ng c xp trong k khng cao qu 1.5m.

Belled pipes must be arranged in the

bracket with height up to 1.5m.

IV. Bo qun (Storage conditions):

IU KIN BO QUN Storage conditions

NG Pipes

JOINT CAO SU

Rubber gaskets

Nhit The storage temperature

Nhit lu tr phi di 25

oC

(Storage temperature

should be below 25oC)

m The humidity of the storage

atmosphere

Phi di nh sng mt tri Exposure to light

Khng c phi ra di nh sng. Do not expose to light

u tr ni mt v ti Store in cool and dark.

Khng c phi ra di nh sng.

Do not expose to light

Thi on lu tr Length of storage

06 nm sau khi sn xut. 06 years after production

Khuyn co Avoid

Trnh ch dc hay ch t khng n nh. Avoid slopes or

unstable land place

Trnh ch ly li, vng t d bn. Avoid muddy, dirty

areas.

Trnh trc tip trn

Khng c ly joint ra khi lp bao b. No joint is taken out of the

packaging layer.

Trnh xa cht dung mi, du, m bi trn v cc cht lm thoi ha khc. Stay away from solvents,

oils, greases and other

substances degradation.


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nn t, nht l loi t c kh nng n mn. Avoid directly on the

ground, especially soil

erosion likely.

Nn lu tr trng thi bnh thng, khng c ko nn hay lm bin dng. Should be stored at normal

state, do not pull or strain

compression.

Nu khng th trnh lm bin dng, th ch nn lu tr trong thi gian ngn If you can not avoid

distortion, do so in the

short term storage

iu kin bo qun Storage conditions

Bo qun Preservation

Trnh

Avoid

Nhit The storage temperature

Nhit lu tr phi di 25oC. Storage temperature

should be below 25oC

m (The humidity of the

storage atmosphere)

Phi di nh sng mt tri(Exposure to light)

u tr ni mt v ti Rubber gasket should

be stored in a cool and

dark place.

Khng c phi ra di nh sng.

Do not expose to light.

Thi on lu tr Length of storage

Ti a 06 nm sau khi sn xut A maximum of 06 years

after production

Khuyn co Avoid

Khng c ly joint ra khi lp bao b. Please dont take joints out of the packaging

- Trnh xa cht dung mi, du, m bi trn v cc cht lm thoi ha khc Rubber gasket should be

kept away from solvent,

oil, grease and other

deterious material.

- Nn lu tr trng thi bnh thng, khng c ko nn hay lm bin dng. The rubber gasket

should, wherever

possible, be stored in a

relax form free from


24

tension, compression or

other deformation.

- Nu khng th trnh lm bin dng, th ch nn lu tr trong thi gian ngn. If it is impossible to

avoid deformation, it

should be kept to a

minimum.

u tr trong thi on tng i ngn Storage for comparatively short

periods.

u tr trong thi on di. Storage for longer periods.

ngh t giong cao su vo trong hp hoc qun chng bng giy, tm nha hay vt liu ph hp khc It s recommended to but the gaskets

in a box or wrap them up in paper,

vinyl sheet or other suitable

material.

Giong cao su phi c bo qun trnh xa cc ngun nhit ha cht, dung mi. Khng c sp xp chng cht trnh giong b bin dng. Joint must be removed from fire,

chemical, solvent. Do not heap to

avoid variation of joint.

Tp kt ti cng trng (Gethering pipes in the contruction site).

ng v vt t, thit b tp kt ti cng trng phi m bo an ton giao thng. Gethering pipes and fittings in the

contruction site have to ensure traffic safety

ng phi c bt 2 u trc khi h xung phui lp t. The socket and spigots of pipe have to be

sealed off before laying into trence.


25

Phn IV. Thi cng lp t ng. Construction and istallation of pipes.

I. Lp t ng gang do (Ductile iron pipe installation).

1. Xung ng vo phui o (Laying):

- H ng xung phui o nh nhng. Lower pipes into the trench without damaging them.

- Khng c u ng va vo thnh phui o. Do not hit pipe ends against the trench walls.

2. V sinh mi ni (Clean):

m v sinh sch u c, bn trong u ci v m cao su. Clean the pipe spigot, inside the

socket and the gasket.

3. Lp joint vo mi ni (Position the gasket):

p m cao su vo trc khi h ng xung phui. Insert the gasket before lowering the

pipe into the trench.


26

DN800mm DN>800mm

4. nh du su thc (Mark the socket depth):

(Trng hp u c cha c nh du trc). nh du u c ti v tr P-1cm. Kim tra cnh vt. (When not shop marked). Mark the spigot at P-1cm. Also, check the condition of the chamber.

5. Tra m bi trn vo mi ni (Lubricate):

Tra m bi trn trn b mt m cao su, cnh vt v u c ca ng. The exposed surface of the gasket, the

chamfer and the pipe spigot.

Dng c qut mt lng keo dn hp l.

Use a brush to apply a reasonable

quantity of lubricating paste.


27

6. Lp rp u ni ng (Assemble):

nh tm v lp u c vo u ci (m bo trc phi thng hng). Thc ng n v tr nh du.

u trong trng hp cn chuyn hng th cho php b ti v tr mi ni 1 gc 3 . Center and insert the spigot into the

socket (making sure axes are aligned).

(a) Up to the line marked at depth P-1

cm.

(b) Up to between the two lines when

shop marked.

7. Kim tra mi ni (Check).

Dng dng c kim tra su nhm m bo ng u theo yu cu k thut. It should be possible to insert the metal gauge up to the same depth all

around the pipe.

8. b tng canh chn ti mi ni (Anchor blocks):


28

Khi lp t ng, ti cc v tr i hng hoc cui ng nh thp, t, khuu, mt bt phi b tng canh chn ti v tr chu lc tc ng nh hnh bn di: Use of concrete anchor blocks is the most commonly applied technique foe

containing the hydraulic thrust of socket and spigots mains under pressure

V tr b tng ca Thp

Cross

V tr b tng ca T Tee

V tr b tng ca khuu 1/16

11-1/40 bends


22-1/20 bends


450 bends

V tr b tng ca 1/90

900 bends

V tr b tng ca mt bt

Blank flange

9. Mt s bin php thi cng ng Gang (Pipe laying equipment): 9.1. Dng x beng (Crowbar):

Ch p dng cho cc c ng knh t 60mm-125mm. (Only use for DN 60 to 125).


29

X beng lm n by ta trn mt t. u c phi c bo v vi mt mu g cng. The crowbar levers against the ground.

The pipe socket face must be protect

with a piece of hard wood

9.2. Dng gu ca xe o (Asembly using digger bucket):

Mt vi s phng nga, c th chp nhn vic dng tay gu thy lc ca my o kt ni cc ng v ph tng thng. Trong trng hp ny :t mt mu g gia ng v gu ca my o. y mt cch chm v u, quan st vch ch ni ng. Taking a few precautions, it is possible

to use the hydraulic force of the arm and

bucket of a mechanical digger to joint

pipes and straight fittings.

In this case :

Place a wooden batten between the pipe

and digger bucket.

Push slowly and steadily, observing the

rules for pipe jointing.

9.3. Dng ti c kh (Mechanical winches):

Dng ti c kh kt hp vi vi dy cp, cm, khi rng rc v mc an ton. DN 150-300: TIRFOR 516 winch with

wire rope and protected hooks.


30

No. DN No. of Wire ropes Shackles Pulley blocks Protected hooks

01 DN 150-300 01 TIRFOR 516 01 01

02 DN 350-600 01 TIRFOR 532 01 01

03 DN 700-1200 02 TIRFOR 532 02 02

04 DN 1400-1600 03 TIRFOR 532 03 06 03 03

05 DN 1800-2000 04 TIRFOR 532 04 08 04 04


31

II. Hng dn thi cng lp t ng HDPE (Bng phng php hn) (HDPE pipe installation guide (By the method of welding).

1. Mt s vn cn lu (Some issues to note).

- Mang gng tay trong qu trnh kim tra li dao hay di chuyn a nhit. Wear gloves during test the blade or move the disk heat.

- a nhit v a vt ng phi t vo g ring khi khng s dng. The disk heat and disk chamfer pipe to put on individual fixtures when

not in use.

- Khng s dng my trong trung hp tri ma, khu vc lm vic m t hoc khu vc c cht d gy chy n. Do not use the machine in case of rain, wet work areas or areas with

flammable and explosive.

- Nhit ca a nhit rt cao, trong khong 200oC do lu cn thn trnh b phng. The temperature of the disk heat is very high, about 200 degrees so note

carefully to avoid burns.

- Ngi s dng my phi l ngi c o to v hun luyn s dng. The users must be trained and trained to use.

- B mt a nhit phi lun v sinh sch s bng vi mm, trnh lm try xc lp sn chng dnh. Surface of the disk heat must always clean with a soft cloth to avoid

scratching the paint stick.

- ng trc khi tin hnh hn phi lm v sinh sch khu vc cn hn, trnh bi bn bm vo b mt hn gy nh hng n cht lng mi hn.

The pipe before welding must be cleaning, avoid dust on the surface

welding affect weld quality.

2. Cng tc chun b trc khi hn (Preparation before welding): - p t my, ni cc dy ngun in, thu lc.

Installation machine, connect the power cord, hydraulic.


32

- Kim tra s b v my, du thu lc, in p ph hp, vn hnh th . Preliminary examination of the machine, hydraulic oils, appropriate

voltage and trial operation.

- Ci t nhit a nhit ph hp (Vi PE thng nm trong khong 195-210

0C).

Install appropriate temperature of the disk heat (with PE typically in

the range 195-2100C).

- Ci t p sut thu lc hn ng (P) ph hp vi kch c v b dy ca ng cn hn (tham kho bng thng s ci t). Install the hydraulic pressure pipe paste (P) in accordance with the size

and thickness of the pipe to welding (refer to table settings).

- Ci t thi gian gia nhit ph hp (tham kho bng thng s ci t). Install the appropriate heating time (refer to table settings).

- Ci t thi gian hn ph hp (tham kho bng thng s ci t). Install appropriate welding time (refer to table settings).

Lu : V cc khong thi gian qu trnh hn ng, c th khng cn ci t trn my cc thit b khc nh ng h eo tay, ng h m thi gians tin li hn do c nhiu mc thi gian khc nhau ni tip xy ra lin tc trong qu trnh hn (xem bng thng s ci t bit chi tit). Note: Regarding the time course of welded pipes, which can not be

installed on your computer other devices such as watches, clocks count

the time... may be more convenient because there are many different

levels of time to take place continuously during welding (refer to table

settings for details).

3. Thi cng hn ng. (Welded construction).

3.1. Vt ng (Chamfer pipe).

- G 2 u ng cn hn vo thit b g, kp cht li. 2 u ng phi cn nhau (nu ng c ng sc mu th nn g sao cho cc ng sc mu nm i xng nhau). Terminal 2 to weld pipe fitting device, clamp tightly. Two ends of

the tube must be equal (if the pipe fitting and stripes should be

such that the color stripes are symmetrical).

- Di chuyn a vt ng vo gia 2 b mt ng cn hn. Move the disk chamfer pipe to the second surface pipe to welding.

- M cng tc cho a vt ng hot ng, lu chiu quay a vt. Open switch for the chamfer disk pipe activity, note chamfer disk

rotation.

- Gt van thu lc ng h thng kp tin hnh vt ng cho n khi b mt vt trn lng, t yu cu. Excluded valve hydraulic closed clamping system to proceed

chamfer pipe until the surface chamfer was smooth, satisfactory.


33

- Gt van thu lc theo chiu m ra. Excluded hydraulic valve by-way opens.

- Di chuyn a vt v v tr g. Move the chamfer disk to position fixtures.

3.2. Hn ng (Welded pipes).

Bao gm 6 bc (the six steps).

1. Cc ng c lp t c nh v thng hng trc khi tin hnh hn.

Clamp and align the pipes to be joined.

2. Hai u ng phi bng phng v c lau chi sch s. Face the pipe ends to establish clean, parallel surfaces.

3. Hai u ng c sp i u nhau v thng hng. Align the pipe profile.

4. Gia nhit ( lm nng chy) 02 b mt cn hn. Melt the pipe interfaces.

5. Gia nhit n nhit thch hp v p 02 mt ng vi nhau. Join the two profiles together by applying the proper fusion

force

6. Gi nguyn cho n khi mi hn ngui li. Hold under pressure until the joint is cool

3.3. Kim tra mi hn (bng mt) (Weld inspection (by eye)).

Mi hn ng

Right

Mi hn rng v cao Nguyn nhn : Do p sut qu cao.

Welds width and height

Cause: Due to high pressure.

ng hn nh ln qu t Nguyn nhn : Do p sut thp.

Welds protrude too little

Cause: Due to low pressure.


34

ng hn nh ln qu cao Nguyn nhn : Do thi gian gia nhit hoc nhit khng ng u.

Welds protrude too hight

Cause: Due to the heating time

or temperature is not uniform.

Mi hn nh ln khng u Nguyn nhn : Do gia nhit khng hoc do thao tc hn qu chm

Emergence of irregular welds

Cause: Due to insufficient

heating or welding operation

too slow

Mi hn lch (dung sai cho php l 10%)

Nguyn nhn : Do tay ngh ca ngi th hn.

Welds deviation (tolerance of

10%)

Cause: Due to the skill of the

welder


35

III. K thut thi cng ng PVC (PVC pipe construction engineering).

1. Hng dn lp t (Installation Instruction): Chun b cng c (Preparation tool):

My ct ng Engine driven cutter.

Bao tay bo h Protective gloves

Thc dy (hoc cc loi thc khc) Measuring wire (or other drugs)

Dung dch x phng Liquid soap

Co hoc x beng Puller or crowbars.

C (dng qut dung dch x phng) Brush (used to scan liquid soap)

Gi lau Wiping rags

Ming g chm u ng Pieces of wood

Bt lng ( nh du) Brushes (to mark)


36

2. Mt s lu c bit (A number of special note):

- Mi ni khi gn xong phi nguyn cho kh, khng c rung t nht trong 5 pht. Dry before using, without disturbing the joints up to at least 5

minutes.

- Khng thoa qu nhiu keo dn, lng keo d ng li s ph hy mi ni. Do not apply solvent cement excessively, the redundant cement would

destroy the joint.

- Keo dn l cht d chy v vy khng gn la hoc khi thuc. Solvent cement is flamable. Do not work near a naked flamed or

smoke.

- Keo dn phi c s dng ni thng thong. Solvent cement should be used in well ventilated conditions.

- Phi tun th nhng ch dn trn hp keo dn. The instruction on the tin should be strickly adhered to.

- Khng c pha thm dung dch khc vo keo dn. On no account mixing solvent cement with another solution.

- Keo dn l loi d bay hi, do phi ng np hp keo sau khi s dng. The solvent in the cement evaporates quickly, so the tin should be

closed immediately after use.

- Khng s dng loi c sn kh cng t lu qut keo. Do not use a brush on which solvent cement has previous hardened.

- Phi lau sch lng keo cn tha trn b mt ng. Must be cleaned of excess glue on the surface of the tube.

- Nu lng keo dn dnh ra trn ng rnh hoc trn cc vt liu lp ng th phi loi b ngay cc vt liu ny. Solvent cement is spilled in the trench or the backfill material, the

contaminated material must be removed from the working area.

1.1. Trng hp 1 (Cho c ng 100 200mm) (Case 1 (DN 100 200mm)).


37

BC 1 VT NG.

Vt u ng khng nong mt gc 15, lm sch phn ng ni v ph kin tng bm chc.

Chamfer pipe edges smooth with a slope of

15o.

Wipe the part or spigot of pipes and fittings

for increasing solid.

BC NH DU.

o on ng cn ni v nh du. Thoa u keo mt ngoi ca u ng n vch nh du.

Measure the pipe by inserting into the

fitting, and mark the position. Apply solvent

cement outer surface of the pipe end up to

the mark.

BC LP NG.

y nhanh v mnh u ng vo khp ni, n v tr nh du v gi khong 15 giy.

Push the pipe end into the fitting up to the

mark and press about 15 seconds.

BC V SINH.

au sch keo tha trn khp ni khong 10 pht trc khi s dng.

Wipe of excessive solvent cement and leave

to dry for approsimately 10 miniture before

using the pipe.


38

1.2. Trng hp 2 (Cho c ng 21 50mm) (Case 2 (DN 21 50mm)).

BC 1 VT NG.

Vt u ng khng nong mt gc 15.

Chamfer pipe edges smooth with a

slope of 15o.

BC NH DU.

o on ng cn ni v nh du.

Measure the pipe by inserting into the

fitting, and mark the position.

BC V SINH TRC KHI LP.

au sch bi u ng v khp ni.

Clean the pipe and the fitting.


39

BC THOA KEO.

Thoa u keo bn trong khp ni v mt ngoi ca u ng n vch nh du.

Apply solvent cement inside of

fitting and outer surface of the pipe

end up to the mark.

BC 5 LP NG.

y u ng vo khp ni, n v tr nh du v gi khong 15 giy.

Push the pipe end into the fitting

up to the mark and press about 15

seconds.

BC V SINH SAU KHI LP.

au sch keo tha trn khp ni khong 10 pht trc khi s dng.

Wipe of excessive solvent cement

and leave to dry for approsimately

10 miniture before using the pipe.


40

IV. Lp t ng cp nc uPVC (Installation uPVC pipes).

1. Chun b cng c (Preparation tool).

My ct ng Engine driven cutter.

Bao tay bo h Protective gloves

Thc dy (hoc cc loi thc khc) Measuring wire (or other drugs)

Dung dch x phng Liquid soap

Co hoc x beng Puller or crowbars.

C (dng qut dung dch x phng) Brush (used to scan liquid soap)

Gi lau Wiping rags

Ming g chm u ng Pieces of wood

Bt lng ( nh du) Brushes (to mark)


41

2. Lp t (Installation):

BC 1 VT NG.

Vt u c mt gc 15 nu u ng cha c vt sn. Chamfer pipe edges smooth with a slope of

15o.

BC NH DU.

nh du chiu di cn lp ni (nu u ng cha c nh du). Mark insert lenght that is needed to joint.

BC V SINH.

m sch u ng, rnh lp giong, giong cao su bng gi sch. Clean the spigot, socket groove and the

rubber ring with dry elth.


42

BC LP GIO NG.

p giong cao su vo rnh cha giong, lu phi lp sao cho giong u v khng b lch. Place the rubber ring into the socket groove

by squeezing the ring in a heart sharpe.

BC 5 BI TRN.

Bi trn mt ngoi ng (phn nh du nh trn hnh) v mt trong ca giong cao su bng dung dch x phng. Lubricating the spigot and the internal

rubber ring with soap solution.

BC LP NG.

a) Lp bng co: t ng tht thng hng, lp ng bng co hoc n by n v tr nh du. Kim tra v tr giong cao su bng thc mng hoc cn l. Place the pipe in the straight line, install it

fully to the mark with a puller or lever.

Check rubber ring position with thin ruler

or feeler leaf.


43

Chun b, gn co knh

thc thch hp t ln ng

khng lm ri ng

Tip theo, t mc co vo

thn ng sao cho thng gc

vi thn ng

Kha, iu chnh (y)

thn kha ca co sao cho

cht kha vo trong rnh

Ko tay cn theo chiu dc

ca thn ng sao cho ng

i theo hng cn thc

b) Lp bng x beng:

Dng x beng lm n by ta trn mt t, u ming bt phi c bo v bi mt mu g cng. u cn li phi c gi c nh, khng c x dch. The crowbar levers against the ground.

The pipe socket face must be protect

with a piece of hard wood.


44

Phn V. Ti lp Re established

I. Lp mng o (Filled the trench).

Sau khi lp t hon chnh tuyn ng, mng o phi c lp li bng ct hoc mt phn ct bao ph ng v mt phn t o ty theo thit k. (Tham kho cc mu mt ct ngang phui o). Cng tc lp t hoc ct phi c thc hin nh sau: After installation of complete pipelines, the trenchs must be filled up with sand

or sand partly covered and partly excavated pipe depending on design. (Refer

to cross-section form). Sand or earth filling work to be done as follows:

+ Nu ton b mng ng bng ct: p tng lp dy 0,2 m, ti nhiu nc, m tht k bng m tay hoc m my. If whole the trenchs with sand: Fill each layer 0.2 m thickness, irrigated

water, thoroughly with compaction hand or machine.

+ Nu lp bng mt phn ct v mt phn t o: If partially filled with sand and partly excavated soil:

Trc ht phi lp ct dy tng lp 0,1 m, ti nhiu nc, m tht k. First, fill each layer 0.1 m thickness with sand, irrigated water,

compaction carefully.

Sau lp li bng t o, ch dng loi t mn khng ln si , cng lp tng lp 0,2 m, ti nc va m, m k. Then, backfill with excavated soil, only use fine soil and fill each layer

0.2 m thickness, irrigated water just enough moisture, compaction

carefully.


45

II. Hon tr mt ng (Backfilling and tarred)

Yu cu k thut i vi cng tc ti lp theo quyt nh S: 145/2002/Q-UBngy 09 thng 12 nm 2002 nh sau: Technical requirements for the re-established by regulations No: 145/2002/Q-UB December 9, 2002 as follows:

i vi mt ng nha hin hu c Eyc < 1270 daN/cm2 : For existing asphalt has Eyc < 1270 daN/cm

2:

+ Chiu dy tng cng lp kt cu o ng : 50cm, bao gm : Total layer thickness of pavement structure: 50cm, including:


46

i vi mt ng nha hin hu c 1270 daN/cm2 < Eyc < 1530 daN/cm2 : For existing asphalt with 1270 daN/cm

2


47

i vi mt ng nha hin hu c 1530 daN/cm2< Eyc < 1800 daN/cm2. For existing asphalt with 1530 daN/cm

2


48

Lu i vi cc tuyn ng trong ni , ni th lp cp phi si c thay bng lp ct gia c xi mng t l 4% 6% c chiu dy bng chiu dy lp cp phi si c thay th.

Note: For routes in the inner city, inner layer of red gravel is replaced with cement sand ratio of 4% to 6% of a thickness equal to

the thickness of the red gravel replaced.

i vi mt ng hm kt cu bng btng ximng (BTXM): For the alley road surface texture of concrete cement (BTXM):

+ Chiu dy tng cng lp kt cu o ng: 40cm. Total layer thickness of pavement structure: 40cm.


49

Kt cu va h ti lp (The pavement structure re-established): + oi 1 (Type 1):


50

+ oi 2 (Type 2):


51

Phn VI. Phng php lp bulong. Bolt tightening method.

I. Tiu chun p dng (Standard Application).

c im k thut (Specification) Tiu chun (Standards)

Tiu chun ch to boulon - ai c - Yu cu k thut. Bolts, screws, studs and nuts. Technical requirements

TCVN 1916:1995

Thp chng n mn v bn nng Corrosion and heat resisting wronght steel bars.

Technical requirements.

TCVN 2735:1978

ng gang do (boulon T) (Ductile iron pipes (boulon T)) JIS G 5526:1998

Ph kin gang deo (boulon T) (Ductile iron fittings (boulon T).)

JIS G 5527:1998

1. Trnh t cng tc lp bu-lng c thc hin nh sau The following tasks are performed in sequence in order to bolt.

1.1. m bo b mt ca cc mi ni phi sch v khng b bm bn. Ensure that faces of the joints are clean and free from dirt or particles of

foreign matter.

1.2. m sch bu-lng v con tn. Clean nuts and bolts.

1.3. p bu-lng nh v (04 bu-lng) vo mi ni. Insert four location bolts in the positions shown in.

1.4. Kim tra m cao su m bo khng b h hi. Inspect gasket to ensure it is undamaged.

1.5. p m cao su vo mi ni. (i vi mt bt thi phi lp m cao su ta trn cc bu lng).

Position insertion gasket on the location bolts.


52

1.6. m mt bt cn li (hoc king) vo cc bu-lng nh v. Offer adjoining flange (or lavril) to bolts.

1.7. Sit 04 bu-lng nh v p cht mi ni theo ng yu cu. c sit bu-lng th hin ti Ph lc.

Tighten four location bolts in the order as required to roughly secure the

adjoining flange. The recommended bolt torques are shown in Appendix.

1.8. p cc bu-lng cn li v sit cho tr vi lc sit theo quy nh. Kim tra cc l bu-lng m bo phi c lp y .

Insert remaining bolts and tighten diametrically opposite bolts to the

recommended torque. Check all bolt holes are filled.

Trnh t sit bu-lng mt bt (Order of tightening bolt).

Hnh minh ha trnh t sit bu-lng mt bt (Illustrations).

Vi mt bt 12 bu-lng tr ln nn sit cng lc hai na phn lp bu-lng. mi pha i lp sit cc bu-lng cung phn t th 1 ri n cung phn t th 2. Sizes with 12 or more bolts should be tightened by

two jointers working simultaneously on

diametrically opposed bolts. Each jointer tightens

opposite bolts in quadrant 1 and then in quadrant

2.

Hnh minh ha trnh t sit bu-lng cho kiu mi ni Lavril (Illustration bolt tightening sequence for splice type Lavril)


53

Hnh minh ha trnh t sit bu-lng king Lavril (Illustration bolt tightening sequence adapter flanges type Lavril).

Lc sit bulng (Bolting torques).

PN10

DN 80 100 150 200 250 300 350 400 450 500 600 700

Lc sit bulng ApproxBolting

Torque (Nm)

05 bar 70 70 110 120 110 120 115 155 150 155 200 200

10 bar 70 75 115 130 120 130 125 170 165 170 225 230

16 bar 70 80 120 140 130 145 135 185 180 195 275 295

PN16

DN 80 100 150 200 250 300 350 400 450 500 600 700

Lc sit bulng ApproxBolting

Torque (Nm)

05 bar 70 70 110 105 145 150 145 180 175 215 270 295

10 bar 70 75 115 110 155 165 160 200 195 240 305 350

16 bar 70 80 120 115 165 180 175 220 215 270 365 465

20 bar 75 80 125 120 175 190 185 235 230 295 425 540

25 bar 75 80 135 130 180 210 200 270 260 345 505 635


54

Phn VII. Bc ph ng bng ti nha PE Polyethylene sleeving.

I. iu kin p dng (Conditions of use).

- t c sut in tr thp ( du hiu ca n mn cao). Low resistivity soils (an indication of high corrosivity).

- t c chloride hoc sulphate cao, hoc c vi khun. Soil where analysis show high chloride or sulphate contents, or bacterial

activity.

II. c tnh k thut (Technical characteristics).

1. Tin trnh lp t (Installation process).

- ng v ph tng phi c lm sch v kh n mc c th trc khi bc ph. Pipes and fittings must be clean and dry as possible before sleeving.

- Trnh t kt gia ng v bc ph. In particular avoid soil entrapment between the pipe and sleeving.

- p m ng v lp t t nhin hoc lp ti lp phi gm cc vt liu mn trnh bc ph b h hi trong qu trnh t ng hoc vn hnh (chu ti bn trn, trng lng khi y ng, lc y). The pipe bed and natural soil, or backfill, must only consist of fine

material, to avoid sleeving damage occurring during laying or in service

(top loads, weight of full main, wheel loads).

- Bc ph phi va kht vi ng (c bit vi cc np gp v dy buc). The sleeving must fit the pipes as snugly as possible (importance of the

fold and ties). See sketches opposite.

- Bc ph ng v mi ni gi chng ln nhau phi c m bo lin tc ton b. The barrel and joint sleeve overlaps must provide total continuity of

protection.

- Np gp phi lun trn ng gim thiu nguy c hu hi trong qu trnh lp t. The fold must always be made at the top of pipes, to limit the risk of

damage during backfilling.

- Khng dng bc ph b rch v trnh h hi trong qu trnh lp t. Do not use ripped sleeving and avoid damage during backfilling.

- C th sa nhng ch rch nh bng bng dnh. Nhng ch ln hn c th c bc trm bng bc ph thm cng loi di che ph vng b h. Bc ph mi ni cng c p dng cng k thut nh trn. Small tears can be repaired with adhesive tape. Larger defects can be

covered with extra sleeving of the same type, which must be sufficiently


55

long to cover the damaged area. The same application technique must be

used as for the joint sleeves.

- Bc ph nha phi c che ph khi ct gi v bo v trnh nhit, trnh mt tri. The polyethylene sleeve must be stored under cover, protected from heat

and sunlight.

- Ct bc ph ng v ph tng theo kch thc c ch ra trong phn Vt liu yu cu v kch thc. Cut the barrel and joint sleeves to the

dimensions indicated in the section

Material required and dimensions

- Vi cc ng t chun c ng knh danh nh t 60 n 600mm, bc ph ng v ph tng c ct sn theo ng knh trong tng gi hng. For STANDARD DN 60 to 600 pipes, the

barel and joint sleeves are supplied pre-

cut to size in one package.

Trc khi t ng vo mng, nng ng ln v lng bc ph gp np dc theo thn ng. Before lowering the pipe into the trench,

raise it up and slip the pleated sleeving

along the barrel.

- t ng nm trn 02 khi g, tri bc ph dc theo sut chiu di thn ng v gp li trn nh ng cho va khch. Bc ph khng c b n. With the pipe supported on two wooden

blocks, spread the sleeving along the

whole length of the barrel and fit it snugly


56

to the latter by folding it over at the top of

the pipe. The sleeve must not billow.

- Dng bng dnh dn cht np gp li. Fasten the fold down with tape.

- Dn cht phn cui ca bc ph bng cch qun bng dnh xung quanh chu vi, dn chng ln vi bc ph mi ni khng thm nc. Fasten the sleeve ends to the barrel by

wrapping adhesive tape around the

circumference, overlapping the barrel

sleeving junction, to give a watertight

overwrap.

- Ct xen k gia ng mi 1,5m (dy thp bc nha). Apply intermediate fastenings (plastic

coated steel wrir) ever 1.50m.

- Bc ph mi ni. Slip on the joint sleece.

- H ng xung mng. Lower the pope into the trench

- Ni ng bng cc ph tng thch hp. Np gp vn phi bn trn nh ng. Joint the pipe with appropriate equipment.

The fold must still be at the top of the pipe.

- Chong bc ph mi ni qua u c v u ci. Cn phi o rng bn di ch ni ng bc ph (c khng gian qun bng dnh v ct dy). Bring the joint sleeve over the socket and

spigod. A sufficiently large excavation

must have been made under the joint to

allow satisfactory application of this

sleeve (room for tape wrapping and ties).

- Bc k mi ni tht kht, lp ny ph qua lp bc ng lin k (np gp trn). Fold the joint sleeve over, fitting it as

snugly as possible, overlapping the barrels

of the adjoining pipes (the fold must again

be made at the top).

- Dng dy but cht st ming ci. Secure it with a tie, as near as possible to


57

the gland in the case of the EXPRESS

joint, or the socket face, in the case of the

STANDARD joint.

- Dng bng keo dn kn theo chu vi ng hai u bc ph vo lp bc ng lin k khng thm nc. Fasten the ends on to the sleeves od the

adjoining pipe barrels with adhesive tape

wrapped around the whole circumference

to make a watertight overwrap.

- p t cc bc ph ng v bc ph mi ni tip theo phi to thnh lp bo v lin tc. Successive assembly of barrel and joint

sleeves must form a continuous protection.

- Dng bc ph nha cng loi bo v ph tng. Ty thuc vo hnh dng ph tng m c th dng 2 hoc 3 ming bc ph. Vic lp t phi theo ngh tng t (phi tht kht). Use the same polyethylene sleeving to

protect fittings. Depending on their shape,

two or three pieces of sleeving may be

necessary. Application must comply with

the same recommendations (particularly

fitting the sleeving as snugly as possible).


58

DN Sleeve Fastening Adhesive tape

I Lf Lj Thickness

E

Number of

barrel and

joint sleeves

per roll

Length of

pipes

protected

per roll

Roll

weight

Qty

per

pipe

Length

per

pipe

Qty

per

pipe

Length

per

pipe

mm m m m m kg m m

60 315 5.80 0.80 200 20 120 15 4 1.8 4 1.2

80 315 5.80 0.80 200 20 120 15 4 2 4 1.6

100 315 5.80 0.80 200 20 120 15 4 2.3 4 1.8

125 400 5.80 0.80 200 20 120 19 4 2.6 4 2.2

150 400 5.80 0.80 200 20 120 19 4 2.9 4 2.6

200 560 5.80 0.80 200 20 120 27 4 3.6 4 3.4

250 710 5.80 0.80 200 20 120 34 4 4.2 4 4.4

300 710 5.80 0.80 200 20 120 34 4 4.9 4 5.2

350 900 5.80 0.80 200 15 90 33 4 5.6 4 6

400 900 5.80 0.80 200 15 90 33 4 6.2 4 6.8

450 1120 5.80 0.80 200 15 90 40 4 7.6 4 7.6

500 1120 5.80 0.80 200 15 90 40 4 8.3 4 8.4

600 1250 5.80 0.80 200 15 90 45 4 9.6 4 10


59

Phn VIII. Sa cha ng b tng tin p c nng thp. Repair prestressed concrete cylinder pipe.

I. B sa cha khn cp (Emergency Replacement kit).

Thnh phn b sa cha khn cp bao gm (Emergency repalcement kit consisting of):

an ng thng (di 3 mt) (Short pipe (3 meter length)).

B ng ni la (di 2 mt) (Closure (2 meter length)).

B chuyn 2 u c (Double-spigot adapter).

ng la cho loi ng LCP (c ng knh 1 -48 inch).

LCP follower ring closure (16-48inch diameters).

tr ban u. Open position.

tr sau khi ho n t t. Close position.

Lu (Avoid):

ng ni la phi c kim tra trc khi c b tng bao ph.


60

Follower ring closures must be pressure tested before the concrete collar in

cast.

Trong sut qu trnh kim tra, phi c bin php chng trt. During testing, block the follower rings as shown to prevent them from sliding.

ng ni la c thit k cho p lc vn hnh n 200psi. Emergency closures are designed for operating pressures up to 200psi.

NG A CHO OI NG ECP (c ng knh 24-84 inch ).

ECP follower ring

closure (90-144inch

diameters).

Pipe

inside

dim.

(inches)

LAID LENGTH Operating

pressure

(psi)

12 feet nominal length 16 feet nominal length 20 feet nominal length E

(feet-in.)

F

(feet-in.)

G

(feet-

in.)

E

(feet-in.)

F

(feet-

in.)

G

(feet-in.)

E

(feet-in.)

F

(feet-in.)

G

(feet-in.)

90 7-11 8-0 7-11 3-11-1/4 8-0 215

96 7-11 8-0 7-11 3-11-1/4 8-0 200

102 7-11 8-0 7-11 3-11-1/4 8-0 190

108 7-11-1/8 8-0 7-11-1/8 3-11-1/4 8-0 180

114 7-11-1/8 8-0 7-11-1/8 3-11-1/4 8-0 165

120 7-11-1/8 8-0 7-11-1/8 3-11-1/4 8-0 160

126 3-11-5/8 8-0 7-11-1/8 8-0 150

132 3-11-5/8 8-0 7-11-1/8 8-0 145

138 3-11-1/8 8-0 7-11-1/8 8-0 140

144 3-08-1/8 8-0 7-11-1/8 8-0 135

Lu (Avoid):

Khi s dng b ng ni la hn, cc v tr mi ni khng c thit k cho vic s dng trong cc khu vc cht hp. When using this field-welded closure, the welds shown are not designed for use

in restrained areas.

Nhng vng la c thit k hn xung quanh ng ng v phi m bo kn nc. These closure rings are designed to be welded to the cylinder around the pipes full circumference and must be watertight.

Cn phi gia c bng cc thanh ging trc khi b tng hon tt cng tc. When the adjacent pipe class exceeds the allowable pipe class, additional rod

reinforcement is required.


61

Sau khi kim tra, b tng bao ph xung quanh ng ni la. After testing, a concrete collar is poured around the entire closure.

o trng xung quanh on ng b tng tin p b h hng sao cho phi ra ton b cy ng. Excavate area around the damaged

section of concrete pressure pipe to

adequately expose its entire length.

Ct on ng b h hng v ly c hai phn on ng ra. B tng c th ph v bng rng gu ca my o v li thp c ct bng.... Cut or break out a section from the

damaged pipe and remove both the bell

and the spigot ends. The concrete can be

broken by the backhoe teeth and the

cylinder cut with an acetylene cutting

torch or cutting can be done by using a carbide-tipped circular saw or

pneumatic spade. Remove the damaged

section carefull to avoid harming the

adjoining sections

p trc b chuyn 2 u c vo u ci ca on ng thng. Nu on ng b h hng l ng vt, lp mt b chuyn vt hon ton hay vt bn phn vo u c ca on ng thng. Pre-assemble a double-spigot adapter

into the bell end the short. If the

damaged pipe section was a bevel,

install a full or haft bevel adapter on the

spigot end of the short.

m sch u ci v u c ti khu vc lp giong ca on ng tip gip. p b chuyn 2 u c vo on ng thng. Thoa cht bi trn v lp giong mi v u c ca on ng thng. H on ng thng mt cch cn thn trnh h hi n b mt mi ni hin hu. Clean off the bell and spigot joint areas

of the adjoining pipe sections. Install the

double-spigot adapter in the short.

Lubricate and place a new gasket in the

spigot groove of short. Lay the short


62

carefuly to avoid damage to the existing

joint surfaces.

p trc ai, giong cao su, ming la vo on ng la. o khong cch hai u c. Chiu di ca on ng la nn nh hn 1 inch so vi khong cch 2 u c. Ct ng la theo kch thc yu cu, nu cn c th dng ... Preassemble the following rings, gaskets,

and bell rings on the closure barrel, and

measure the clear distance between the

spigot ends. The length of the closure

should be 1 inches less than the clear

distance. Cut the closure, if necessary,

using a carbide-blade saw

H ng la mt cch cn thn v canh . Lower the closure carefully and align it

with the double spigot adapter and the

spigot of the adjoining pipe section.

Install the closure as shown using a

come along to pull the bell rings over the

spigots. Roll the 15/16 inch closure

gaskets into position and compress them

with the follower rings by tightening the

bolts. (For a welded clsure, see the detail

drawing on Page 10)

p ti thiu 2 thanh ging gia cc king p. Khi lp cc thanh ging. Place a minimum of two struts between

the follower rigns. When the struts are in

place, turn the water back on and

pressurize the line while checking for

leaks. Tighten the bolts further, if

required. When the line is back in

service, encase the closure area in

concrete to provide corrosion protection.

The diaper and grout the other joints


63

II. Hn sa mi ni (Welded repair joint).

Hn mi ni (Welded Joints).

Trong nhng trng hp nht nh, c th cn thit hn mt joint vo v tr mi ni. Nhng vic ny c th hn ch lc y hoc sa cha cc mi ni. Under certain circumstances, it may be necessary to weld a joint in the field.

These circumstances may include thrust restraint or the repair of joints. Other

types of restrained joints are recommended for thrust restraint.

III. Sa cha khn cp bng king p (Emergrncy repair saddle).

Sau khi c lp t v kim tra, cc king p phi c bao bc bn ngoi mt lp va xi mng portland hoc b tng vi dy t nht 1 inch (2,56 cm). Once it is installed and tested, but prior to backfilling, the entire repair saddle

including straps should be encased in portland cement mortar or concrete to

provide a covering at least 1 inch thick over the external steel surface.

PIPE

SIZE

(inches)

A B C

16 1/4 32 8

18 1/4 32 8

20 1/4 32 8

24 1/4 36 9

30 1/4 36 9

36 3/8 36 9

42 3/8 36 9

48 3/8 36 9


64

Phn IX. Mt s phng php lm sch ang c p dng hin nay. Flushing methods are being applied.

I. Sc x thng thng (normanlly):

phng php lm sch n gin v thng dng nht.

A flushing method is simple and most normally.

Thc hin th cng bng cch ng hoc m van, x qua tr cu ha, hm x v.v Perform manually by closing or opening the valve and discharge through

the Hydrant Fire and Exhaust Shaft.

Kinh ph nhn cng, my mc sc x thp, tuy nhin lng nc s dng rt ln, c bit l cc tuyn ng truyn ti Funding for labor, machinery is low, but a huge amount of water is used,

especially in the transmission pipeline

1. Nguyn tc thc hin (Principle):

Cng tc sc x c thc hin theo tun t t u ngun n cui ngun, t cc tuyn ng cp 1,2 ri n mng phn phi. The flushing is made sequentially from upstream to downstream, from

transmission pipeline to distribution network.

Cng tc sc x phi m bo cc yu cu theo quy nh lm sch ng ng cp nc (vn tc dng chy trong ng, p lc x, vn tc x,). The flushing must ensure the requirements of SAWACO (flow velocity in

the pipe, flushing pressure, flushing velocity, ...) .

Trong qu trnh sc x, cc outlet tiu th c c lp trnh vic ngi dn s dng cht lng nc khng m bo. In the flushing procedure, the outlet is isolated to prevent people using

the water that quality is not guaranteed.

Ty thuc vo lng nc sc x ca tng tuyn ng, s c phng n iu tit mng li ph hp hn ch nh hng n vic vn hnh ca Nh my nc v sinh hot ca ngi dn.


65

Depending on flow of every exhaust pipeline, there will be a network

operation plan to reduce the influence to water plant operations and

activities of people.

Cht lng nc sau khi sc x phi c n v tip nhn nghim thu tin hnh cc bc tip theo (m bo c, Clo d, cm quan mu ca nc) v ly mu xt nghim cc ch tiu (13 ch tiu). After flushing, water quality have to be accepted by receiving unit for

doing the next steps (to ensure turbidity, residual chlorine, sensory color

of water) and take samples for testing criteria (13).

2. C s tnh ton (Foundation).

Cc cng thc tnh ton p dng (The calculation formula):

Lu lng qua ng (Flow through the pipeline):

Q = V x A, trong :

+ Q: lu lng (m3/s) ( flow (m3 / s)).

+ V: vn tc dng chy (m/s) (Flow velocity (m / s)).

+ A: din tch mt ct t (m2) = x D2/4 (D: ng knh ng(m)) (wet cross-sectional area (m2) = x D2 / 4 (D: diameter (m))).

Lu lng x ti cc im x tnh theo cng thc: (flow at discharge points).

Q=A x C x (2 x G x H)0,5, trong :

+ A: tit din l x (m2) = x d2/4 (d: ng knh ng x(m)) (discharge hole section (m

2) = x d2 /4 (d: diameter of the exhaust pipe (m))).

+ C: h s tc dng chy(0,6 0,9), do l x phi thng qua on ng x di nn chn C = 0,6 0,8 (0.6 to 0.9).

+ G: gia tc trng trng (m/s2) (Gravitational acceleration (m/s2)).

+ H: ct p ng ti im x, ly bng p lc tnh trc im x (trn ng chuyn ti) (Pressure at the discharge points).

Ghi ch: Cng thc ny c nu trong Quy nh lm sch ng ng cp nc (vi C = 0,75). Tuy nhin p dng cng thc th phi la chn gi tr ct p x Hx ph hp.

Note: We are using C = 0,75.


66

Cc thng s yu cu: Vn tc x ti thiu 0,76 m/s (theo

quy nh lm sch ng cp nc 505/Q-TCT-KTCN ngy 17/7/2009). Tuy nhin, t hiu qu sc x cao th vn tc dng chy trong ng phi t trn 1m/s).

The required parameters: Minimum discharge velocity is 0.76 m/s. However, it should be above

1m/s).

3. Yu cu trong qu trnh thc hin (Required in the flushing procedure).

Ti im x cui tuyn, thun li thao tc c th dng coude hoc 1/8 o ng ln mt t i vi cc v tr x cui tuyn. At the end of the pipeline, we can use coude 1/4 or 1/8 to turn the

pipeline to the surface.

Dng ng cng hoc mm dn nc x n cng, mng x, knh gn nht v.vkhng nc chy trn trn ng nh hng giao thng v sinh hot ca ngi dn. Use hard or soft pipes to divert water to sewer, drain trenchs, canals,

etc. ... to reduce the effect to traffic and activities of people.

X cho n khi nc trong (bng mt thng). Flushing until the water is clear.

Ngun nc x: nc trong mng hoc xe bn (ty theo iu kin thc t p lc trong mng). Water source for flushing is from the tank truck or network (depending

on pressure conditions in the network).

Cht lng nc ngun phi tng ng cht lng nc cp vo mng. Quality of water source and quality of water in network is same.

4. Mt s hn ch v phm vi p dng (Field of application).

Phm vi p dng: Ch hiu qu i vi ng c ng knh nh ( 200mm), cc ng c ng knh cng ln th cng kh t vn tc dng chy trong ng ti thiu l 1m/s. Only effective for small diameter ( 200 mm), the larger diameter, the more difficult to achieve in the pipe flow velocity of at least 1 m/s.

Ghi ch: i vi cc tuyn ng ln (ng knh >600m) trong iu kin hin ti buc phi p dng phng php sc x thng thng nhng hiu qu khn cao v lng nc sc x rt ln.

Note: for large pipelines (diameter> 600m), this method is not effective and

spend a lot of water.

t hiu qu i vi ng b khm 1 lp v cng.


67

Less effective for a tube that has been inlaid shell.

nh hng n lu lng v p lc mng xung quanh trong thi gian tng i di, c bit l sc x cc tuyn ng ln, v vy i vi vic sc x cc tuyn ng chuyn ti th cn thit phi c phng n iu tit h thng (nh my nc, mng li) phc v sc x. Affect to network flow and pressure, especially for large pipelines, so we

need network operation plan to reduce the influence to water plant

operations and activities of people.

Hu dng khi dng lm sch cc im c cc b. Useful when used to clean the local area network.

Nn s dng phng php ny sau khi lp t ng mi v sau khi sa cha, kt hp vi kh trng. Should use this method after installation of new pipeline and after

repair, combined with sterilization.


68

II. Lm sch bng phng php polypigs (Cleaning by polypigs):

1. Khi nim (Concept):

phng php s dng p lc v vn tc dng chy trong ng a thit b chi ra ng (cn gi l polypigs) c ra ng. C th s dng cc thit b nh:

A method of using pressure and flow velocity in the pipe to provide pipe

cleaning devices (also known as polypigs) for cleaning the pipeline. Can

use devices such as:

au chi nh: dng ming bt cao su c ch t nha tng hp. Lightly cleaning: Using the sponge rubber is made from synthetic

resin.

au chi: dng ming bt c vi lp cao su tng hp bc ngoi (an cho nhau). Normally: using special sponge with layers of synthetic rubber

coating (cross-).

Co ng: dng ming co bng nha tng hp c bn chi st bng thp cng. Shaving: using shaving plastic pieces with synthetic hard steel wire

brush

HNH NH MINH HA (ILLUSTRATIONS):


69

2. Yu cu trong qu trnh thc hin (Required of the flushing procedure):

Vn tc nc yu cu ti thiu l 1m/s, p lc yu cu >2 bar. Minimum velocity is 1 m / s, minimum pressure is 2 bar.

Cn c s tr gip ca my nn v bn tr nc nu p lc mng khng m bo y thit b di chuyn trong ng. Needed the help of compressors and tanks if the network pressure is not

guaranteed to push the device to move in the pipeline.

Mng li phi c cch ly nh trng hp sc x thng thng. The network must be isolated like normallymethod.

Ming chi nh rt linh hot v c th chn ming chi c kch c t 5 20% so vi ng knh ng. oi vt liu ca thit b c th chn la cho ph hp vi c th ca tng tuyn ng (v d i cc tuyn ng c nhiu on i hng th c th s dng loi vt liu mm ,.). Lightweight flexible cleaning pads and cleaning pads can select the size

from 5-20% over the pipe diameter. The material of the device can be

selected to suit the characteristics of each pipe (for example there are

several sections of pipeline can redirect the use of soft materials, ....).

i vi ng c ng knh trn 200 phi c sp xp c bit a ming chi vo, kh trnh vic st gim p lc trong mng li. For the pipeline with the diameter over 200 mm, we must have special

arrangements to put devices on, hard to avoid the drop pressure in the

network.

3. Phng php thc hin (Method).

Xc nh v tr u tuyn sc x bng qu mt. V tr a qu mt vo trong ng c th l mt on ng ni nm ngay sau v tr van chn tuyn. Determine the start position. The

position where put the device into

the pipeline may be a short pipe

right after valve.

Tho on ng ni v a qu mt vo trong ng. Remove the short pipe and put the

device into the pipeline.


70

p li oan ng ni. Trong trng hp p lc mng khng y qu mt th c th s dng my nn kh h tr .

Reinstall the connector pipe. In case

the network is not enough pressure

to push the device, we can use air

compressors.

Thu hi qu mt ti v tr cui tuyn. Retrieve the device at the end of the

pipeline.

Bng thng s k thut vn h nh qu mt hiu qu (Technical parameter of device):

ng knh Diamater

(mm)

p lc (bar) Pressure

Lu lng (m3/h) Flow

Lc khi pht Start

Chy u Normally

0,9m/s 1,5 m/s

50 7 14 2.8 7 6.9 11.5

100 5.3 8.8 2.1 5.6 27.6 46

150 3.5 7 2.1 5.3 57.5 103.5

200 2.1 5.6 1.8 4.9 103.5 184 250 2.1 4.2 1.8 3.5 172.5 287.5

300 2.1 3.5 1.4 3.2 230 414

350 1.4 3.5 1.1 2.8 322 575

400 1.1 3.2 0.7 2.8 414 690 500 1.1 2.8 0.4 1.4 644 1150

600 0.7 1.8 0.4 1.4 920 1610

4. Phm vi p dng v hn ch (Field of application and restriction).

4.1. Phm vi p dng (Field of application).

+ Hin nay, trong nc ch mi c thit b polypigs cho ng knh ng ti a l 600mm. V vy, i vi cc tuyn ng ln hn th vn phi p dng bin php lm sch ng khc. Currently, this method applies to the smaller diameter pipe 600mm.

So, for the larger pipeline we must still apply other measures to clean

pipe.

+ Hn ch i vi cc tuyn ng qu c mc ng mt lp cn dy.


71

Less effective for old pipelines that has been inlaid shell.

4.2. Hn ch (Restriction).

Nhng vn c th gp phi trong qu trnh thc hin: These problems may be encountered in the implementation process:

+ Trong mt s trng hp khng chun b k lng c th tht lc cc ming chi, vic nh v v thu hi cc ming chi b tht lc kh khn v tn km. In some cases, if we are not prepared , the device may be lost, the location and recovery of missing device is very difficult and expensive.

+ Nu la chn cc ming chi khng ph hp c th lm ming chi b v lm nhiu mnh, c th nh hng n ng h khch hng. If the devices is not suitable alternative, they can be broken into several pieces, which can affect the customer meters.

+ phc v sc x nh k th trn mng phi pht sinh thm mt s cng trnh (hm, h thu) a thit b chi vo ng vo thu hi sau khi xong.

Using this method on the network must periodically incur a number of

works (tunnels, sump) to put the device into the pipeline and retrieve

the device after complete recovery.

+ i vi cc cng trnh mi lp t c ng knh 600mm, vic p dng sc x lm sch bng thit b chi l bt buc v cn c tnh ton v chun b k lng. For new construction installation with diameter 600 mm, the application of this method is required and should be calculated and

prepared.

5. u im (Advantages).

+ C th p dng cho phn ng ng di ln n 5km. It can be applied to the pipe length up to 5km.

+ ng nc phc v cng tc sc x khng ln v hiu qu lm sch ng cao hn nhiu so vi phng php sc x thng thng. This method saves more water than normally methods and this method

is high-efficient than normally methods.

+ Phng php ny linh hot v ph hp, c th p dng cho hu ht cc c ng v tnh trng bn trong ng. This method is flexible and appropriate, may apply for most pipe sizes

and status within the pipeline.


72

Phn X. Ct t khng ng nc bng my khoan CL-12. Cut tee and do not close the water.

I. Thit b khoan CL-12 (Equipment).

II. Cc bc chun b v vn hnh my khoan CL-12 (Steps in preparing and operation).

1. Kim tra dao ct v mi khoan nh tm m bo cn sc bn.Nu cn nht,cn mi cho bn theo nh ch dn. Kim tra cc cht khoan nh tm trc khi vn hnh m bo chng s chm hon ton vo v tr. Inspect cutter and pilot drill to make sure

that they are sharp. If cutter is dull it

should be sharpened as described in

maintenance instructions. Check pilot drill

detents before each operation to make sure

they will move completely to the

submerged position.

2. Sit cht bng b lon ng c b iu hp vo thn trc ca my khoan. Hnh 1. Kim tra xem ming m gia my khoan v b iu hp cn tnh trng tt khng (phi thay th nh k cc ming m) Boll proper size of adapter to front of machine.Figure 1. Check to be sure

machine to adapter gasket is in good condition and in place. (All gaskets

should be periodically replaced.)

Ghi ch: phn sau ca C -12 bn s thy 02 nm c kha.Mt c ghi Automatic Feed set (t ch t ng). Nm ny c dng n nh mc di chuyn khi khoan ct ch t ng. Xem ch dn on 13.


73

Note: On the rear case of the CL-12 Machine you will see two Knurled Knobs.

One is marked Automatic Feed Set. This knob is used to set the amount of travel

required in automatic feed to complete the cut. See instruction 13.

Nm kia l t m vo ch khoan ct t ng. Xem ch dn on 3 di y. nh cc nm ny ra,hy nhn xung hot gt v pha ngn hp s. The other Knurled Knob is the Automatic Feed Engagement Knob which is used

to place the machine in automatic feed. See instruction 3 below.

a vo hot ng, ko n ra hay gt ra xa ngn s. To disengage these knobs-push them in or towards the gear case.

To engage these knobs-pull them out or away from the gear case.

3. Nh ra khi ch t ng bng cch nhn nm nhp vo ch t ng pha sau my khoan.Hnh 2 : Nm ny c u vung v c xc nh bi mt bng ghi trn thn sau ca my khoan. Disengage automatic feed by pushing in

on Automatic Feed Engagement Knob on

rear of machine. Figure 2. This knob has

squared end and is indicated by a name

panel on rear of machine.

4. Rt cc tay quay khi v tr thn trc v nt ng di v dc theo cc ng h ch th di chuyn t ng v v tr ca b phn.Hnh 3:Gn cc tay quay vo trc vung trung tm v xoay theo chiu kim ng h y thanh khoan v pha trc.

Hnh 4: Thanh khoan phi x dich l ra l xit c gi trc bn ngoi mt ca b iu hp Crank handle from its position on the

combination shaft and pipe plug located below

and alongside Automatic Feed travel and Tool

Position Indicators. Figure 3 . Attach crank

handle to center squared shaft and rotate

clockwise to advance boring bar. Figure 4

Boring bar should be advanced enough to

expose hub retaining screw hole beyond face of

the machine adapter.


74

5. Gn thit b khoan ng kch c vo thanh khoang.

Attach proper drilling equipment to the boring bar.

(a) C 2 inches .Tho c gi khi b iu hp thanh khoan. Gn b iu hp thanh khoan vo khp ni. Xp thng hng cc l b iu hp thanh khoan v thanh khoan. Bt vt lai c gi bng cch vn vo l trong thanh khoan v vo l c rng ca b iu hp thanh khoan. (a.) 2" size. Remove retaining screw from boring bar adapter. Insert boring bar

adapter into socket in the boring bar. Align holes in boring bar adapter and

boring bar. Replace retaining screw by inserting it through hole in boring bar

and into boring bar adapter tapped hole. Tighten securely with screw driver.

Screw solid drill into boring bar adapter.

Xit cht bng tuc n vt * * t ai nhc pha trc ln trc quay vung cn s quay ca thanh khoan khi lp cc dng c (hnh 9)

* Wrench flats on drill may be used to tighten drill into boring bar

adapter.*Place the front lifting yoke over the square drive spindle to

prevent rotation of boring bar when attaching tools. Figure 9.

(b) C 21/2 inches. Tho c gi ra khi trc khoan ct. Gn trc ny vo khp

ni thanh khoan. Xp thng hng cc l hai b phn ny.Vn c gi vo l thanh khoan v l c kha trc khoan ct. Xit cht li bng tua n vt

(b) 21/2 size. Remove retaining screw from cutter arbor. Insert cutter arbor

into socket in the boring bar. Align holes in cutter arbor and boring bar.

Replace retaining screw by inserting it through hole in boring bar and

into cutter arbor tapped hole. Tighten securely with screw driver.

(c) C 31/2 inches v ln hn Tho b lon gi m trc v ming m kha ra khi trc dng mi dao khoan

ct. y m trc dao ct n thanh khoan. Xp thng hng c l ny. t li b lon gi m trc v vng m kha bng cch lp vo qua l m, thanh khoan v vo l c kha ca dng dao ct. Xit cht bng km hnh 5.

(c.)31/2 size and larger. Remove hub retaining bolt and lack washer from

cutter hub. Slide cutter hub onto boring bar. Align the holes in the cutter

hub and the boring bar. Replace hub retaining bolt and lock washer by

inserting it through hole in hub, boring bar and into cutter hub tapped

hole. Tighten securely with wrench Figure 5.

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So Tay Ky Thuat Thi Cong Cong Trinh Cap Nuoc