បេតុងពង្រឹងដោយដែក 13 xiii-footings

8/11/2019 13 xiii-footings

1/41


2/41

T.Chhay NPIC

Footing 275

epSgKaBIeRkamnIv:UdI. r)aykarN_BIkarBiesaFn_dIkMNt;nUvlTPaBRTRTg;GnuBaatedIm,IeRbIkgkarKNna.enAtMbn;RtCak;EdlmanFak;RBil frost actionGacnwgekIneLIg bfycuH. dUcenHeKcaM)ac;RtUvdak;eCIg

tagBIeRkam freezing depth edIm,IeCosvagkarmanclna.

2> RbePTeCIgtag Types of Footings

eKmaneCIgtagCaeRcInRbePTEdleRbIsMrab;RTssr bCBaaMg. eCIgtagEdleKeRbICaTUeTAmandUcxageRkam

- Wall footingsRtUv)aneRbIedIm,IRT structural wallEdlRTbnkBIkMralxNbedIm,IRTnonstructural walls

. vamanTTwgkMNt;nigmanRbEvgCab;KaenABIeRkamCBaaMg rUbTI13>1.Wall

footings Gac mankMras;EtmYy Gacmanfak;bGacmanCMral.


3/41

Department of Civil Engineering viTasanCatiBhubeckeTskm2. vaGacmanragkaerctuekaNEkg brgVg;. mgeTot eCIgtammankMras;esI manfak;bmanCMral. vaCaRbePTeCIgtagEdl

manlkNsnSMsMcbMput negvaRtUv)aneRbIenAeBlssrmanKMlatqay. RbePTEdleKcUlciteRbICageKKWmanragkaer bctuekaNEkgCamYykMras;esI.

- Combined footing rUbTI13>3CaTUeTARTssrBIr bssrbIEdlminenACYrEtmYy. ragrbs;eCIgtagkgbg;GacCactuekaNEkg bctuekaNBay GaRsynwgbnkssr. Combined footingsRtUv)aneRbIenAeBlssrBIrenACitKaEdleCIgtag single footings minGaceRbI)an benAeBlssrmYysitenAelIbenAEk,rproperty line.


4/41

T.Chhay NPIC

Footing 277

- Cantilever or strap footings rUbTI13>4 rYmmaneCIgtag single footings BIrPab;edayFwmmYy bstrap mYy nigRTssreTalBIr. vaRtUv)aneRbIenAeBlEdleCIgtagmYyRTssrcakpit ehIy

eCIgtagmYysitenAEk,rmancMgayKMlattUc. RbePTeCIgtagenHCMnYs combined footings nigeBlxHmanlkNsnSMsMcCag.

- Continuous footings rUbTI13>5 RTnUvssrmYyCYrEdlmancMnYncab;BIbIeLIg. vamanTTwgkMNt;nigCab;KaBIeRkamssrTaMgGs;.


5/41


6/41

T.Chhay NPIC

Footing 279

eCIgtagsitenABIelIdIsit (cohesive soil) dUcCadI\d sMBaFenABIxageRkamcugeCIgtagFMCagenARtg;GkSrbs;eCIgtag rUbTI13>10. dI\dEk,rcugRKwHmanPaBsitxaMgCamYynwgdI\denAEk,rEdlBTCMu

vijeCIgtag begIt)anCakarBRgaysMBaFmines

I.CaTUeTAsMBaFdIRTRTg;GnuBaat aq RtUv)ankMNt;ecjBIkarBiesaFn_dI. sMBaFdIRTRTg;GnuBaat

enHERbRbYleTAtamRbePTdI BItMlx8 enAeBlEdlbnk P manGMeBIEpkneCIgtagBIeRkamssrrkklnwgRsutcuHeRkam. eCIgtagnwgyknUvTMrg;ExSRtg;esIEdlbegItCasMBaFbukeLIgelIvijedIm,ITb;Epkn


7/41

Department of Civil Engineering viTasanCatiBhubeckeTskm karBicarNakgkarKNna Design Consideration

eCIgtagRtUv)anKNnaedImI,RTbnkssr nigbBanbnkssreTAdIy:agsuvtiPaB. viFIsaRskgkarKNnaRtUvEtykersIusg;caM)ac;xageRkammkBicarNa

- RkLapeCIgtagQrelIlTPaBRTRTg;dIGnuBaat- kMlaMgkat;mYyTis one-way shear

-

kMlaMgkat;BIrTistwo-way shear

bkMlaMgpugpunching shear

- m:Um:g;Bt;nigbrimaNEdkRtUvkar- lTPaBRTRTg;rbs;ssrenA)atrbs;va nigEdk dowel caM)ac;- RbEvgf1>

TMhMeCIgtag Size of FootingRkLapeCIgtagGacRtUv)anKNnaBIbnkxageRkABitR)akd m:Um:g; nigbnkKanemKuNEdl

minFMCaglTPaBRTRTg;rbs;dI. CaTUeTA sMrab;bnkQr

RkLapeCIgtagaqpressure,soilallowable

weight)-self(includingloadservicetotal= !#>!

baq

totalPArea

)(=

Edl bnkeFVIkarsrubCabnkKNnaK

anemKuN. enAeBlEdlRkLapRtUv)ankMNt; sMBaFdIemKuNRtUv)anTTYledayEckbnkemKuN LDPu 6.12.1 += edaykLapeCIgtag. kareFVIEbbenHedIm,IKNnaeCIgtagtamviFIKNnaersIusg;(strength design method) .

footingofarea

uu

Pq = !#>@

sMBaFdIGnuBaat aq RtUv)anTTYlBIkarBiesaFn_dI nigQrelIlkxNbnkeFVIkar (serviceload) .


8/41

T.Chhay NPIC

Footing 281

4>2> kMlaMgkat;mYyTis kMlaMgkat;Fwm 1uV One-Way Shear (BeamShear)

sMrab;eCIgtagCamYynwgkMlaMgBt;mYyTis muxkat;eRKaHfak;sitenAcMgayd

BIpmuxrbs;ssr.kMlaMgTajGgt;RTUgenAmuxkat; mm kgrUbTI13>11 GacRtUv)anBinitemIldUcGVIEdl)aneFVIsMrab;Fwm. kMlaMgkat;TTwgGnuBaatenAkgkrNIenHesInwg

bdfV cc '12

2 = 75.0= !#>#

Edl =b TTwgrbs;muxkat; mm . kMlaMgkat;TTwgemKuNenAmuxkat; mm GacRtUv)anKNnadUcxageRkam

= dCLbqV uu 22

1 !#>$RbsinebIEdkkMlaMgkat;TTwgminRtUv)aneRbI enaH dGacRtUv)anKNna edaysnt; cu VV =

bf

Vd

c

u

'2

12 1

= !#>%

4>3> kMlaMgkat;BIrTis kMlaMgpug 1uV Two-Way Shear (PunchingShear)


9/41

Department of Civil Engineering viTasanCatiBhubeckeTskm12.ACI Code, Section 11.12.2GnuBaatersIusg;kMlaMgkat;TTwg cV enAkgeCIgtagEdlKanEdk

kMlaMgkat;TTwgsMrab;GMeBIkMlaMgkat;BIrTis esInwgtMltUcCageKbMputn

dbfV occ '12

41= !#>^

12

'422

dbfV

occ

+=

!#>&

12

'23

dbf

bdV oc

o

sc

+= !#>*

Edl = pleFobRCugEvgelIRCugxIrbs;ssr=ob brimaRtnmuxkat;eRKaHfak;EdlenAcMgay 2/d BIRkLapbnk muxkat;ssr

emIlrUbTI13>12=d kMBs;RbsiTPaBrbs;eCIgtag


10/41

T.Chhay NPIC

Footing 283

sMrab;tMl 1cV nig 2cV eyIgeXIjfa 1cV lb; tUcCag 2cV enARKb;eBlEdl 2 b:uEn

2cV lb;tUcCag 1cV enARKb;eBlEdl 2> . enHbgajeGayeXIjfakMlaMgkat;TTwgGnuBaat

cV RtUv)ankat;bnysMrab;eCIgtagEvgxaMg. bMErbMrYlsMBaFdIBitR)akdtambeNayRCugEvgCamYynwgkarekIneLIgn . sMrab;rUbragdTeToteRkABIctuekaN KWCapleFobrvagTMhMEvgCageKbMputnRkLapbnkRbsiTPaBkgTisedAEvg elITTwgFMCageKbMputkgTisedAxIEkgnwgTisedAEvg.

sMrab;smIkar !#>* s RtUv)ansnt;esI 40 sMrab;ssrenAkNal/ esI 30sMrab;ssrenAxag nigesI20 sMrab;ssrenARCug. ersIusg;kMlaMgkat;TTwgrbs;ebtug 3cV bgajBI\TiBlnkMeNIn

ob elI d. sMrab;pleFobx !#>!0

oco

s

u

bfb

d

Vd

'2

12 22

+

=

!#>!!

kMlaMgkat;TTwgBIrTis 2uV nigkMBs;RbsiTPaB dcaM)ac;RbsinebIEdkkMlaMgkat;TTwgminRtUv)aneRbIGacRtUv)anKNnadUcxageRkam eyagtamrUbTI 13>12

a.

snt; d

b. kMNt; ob )(4 dcbo += sMrab;ssrkaer EdlRCuges

Ic .)(2)(2 21 dcdcbo +++= sMrab;ssrctuekaN EdlmanRCugesInwg 1c nig 2c

c. kMlaMgkat;TTwg 2uV eFVIGMeBIenAelImuxkat;EdlmanbeNay )(4 dcbo += b 1(2cbo = )(2) 2 dcd +++ nigkMBs; d. muxkat;enHrgnUvkMlaMgbBarcuHeRkam uP nigkMlaMg

bBareLIgelI uq smIkar !#>@. dUcenH2

2 )( dcqPV uuu += sMrab;ssrkaer !#>!@a

))(( 212 dcdcqPV uuu ++= sMrab;ssrctuekaNEkg !#>!@b


11/41

Department of Civil Engineering viTasanCatiBhubeckeTskm4>

ersIusg;Bt;nigEdkeCIgtag Flexural Strength and FootingReinforcement

muxkat;eRKaHfak;sMrab;m:Um:g;Bt;ekItmanenABImuxpssr muxkat; nn / rUbTI 13>13.eKRtUvBinitemIlm:Um:g;Bt;enAelITisnImYyrbs;eCIgtag nigdak;brimaNEdkRKb;RKan;. sMrab;eCIgtagkaer nigssrkaer m:Um:g;Bt;mantMlesIKaTaMgBIrTis. edIm,IkMNt;muxkat;EdkcaM)ac;eKRtUveRbIkMBs;rbs;eCIgtagTaMgBIrTis. edaysarEtEdkenAkgTismYysitenAelIEdkenAkgTismYyeTot kMBs;Rb

siTPaBd

ERbRbYleTAtamGgt;pitrbs;EdleRbI. tMlmFmrbs;d

GacRtUv)anykmkeRbI. tMlsMrab;karGnuvtn_ dRtUv)ansnt;esI mmh 110 .


12/41

T.Chhay NPIC

Footing 285

CaerOy kMBs;RbsiTPaBrbs;eCIgtagRtUv)anRKb;RKgedaykMlaMgkat;TTwg EdlcaM)ac;RtUvkarkMBs;eCIgtagFMCagkMBs;eCIgtagEdlRtUvvkaredaym:Um:g;Bt;. EdkBRgwgkgTisedAnImYyGac

RtUv)anKNnaenAkgkrNIGgt;rgkarBt;dUcxageRkam

=

bf

fAdfAM

c

ysysu

'7.1 !#>!#

m:ageTot PaKryEdkGacRtUv)ankMNt;dUcxageRkam smIkar $>@

( )

=

c

u

y

c

f

R

f

f

'85.0

211

'85.0

!#>!$

Edl 2/ bdMR uu = . enAeBlEdl uR RtUv)ankMNt; kRtUv)anTTYlBIsmIkar !#>!$.

tMrYvkarpleFobEdkGb,brmaenAkgGgt;rgkarBt;KWes

Inwg yf/4.1 enAeBlMPaf c 31' < nigesInwg yc ff 4/' enAeBl MPaf c 31' . b:uEn ACI Code, Section 10.5

bgajfasMrab;kMralxNEdlmankMras;esI RkLapGb,brma nigKMlatGtibrmanEdkenAkgTisedAnkarBt;KYrRtUvkarEdkrYmmaD nigEdksItuNPaB. tMrUvkarEdkGb,brmaelIkeRkayenHmantMltUcehIypleFobEdkGb,brmaEdlmantMlFMCagRtUv)anesIeLIg EtvaminKYrFMCag yf/4.1 .

EdkenAkgeCIgtagmYyTis nigeCIgtagBIrTisRtUvEtBRgayeBjTTwgeCIgtag. kgkrNIeCIgtagctuekaNBIrTis ACI Code, Section 15.4.4kMNt;faenAkgTisedAEvg EpknEdksrub ls RtUv)anEbgEckesIenAelITTwgrbs;eCIgtag. enAkgTisedAxI PaKryBitR)akdrbs;EdksrubenAkgTisedAenHRtUvEt)andak;esIenAkgbandwidthesInwgRbEvgnRCugxIneCIgtagGaRsynwg

1

2

+=

s !#>!%

Edlfootingofsideshort

footingofsidelong= !#>!^

BandwidthRtUvEtsitenAkNalnGkSrbs;ssr rUbTI13>14. EdkEdlenAsl;enAkgTisedAxIRtUvEtBRgayesIBIxageRkA Bandwidth . PaKryEdkenAsl;enHminKYrticCagEdkrYm maDnigEdksItuNPaB.

enAeBlEdlssreRKOgbgMGMBIEdk bssr\dRtUv)aneRbIenaHmuxkat;eRKaHfak;sMrab;m:Um:g;Bt;enAkgeCIgtagRtUv)anykenAcenaHBak;kNal nigEKmCBaaMg\dnigcenaHBak;kNalpssrnigEKmn steel base plate (ACI Code, Section 15.4.2).


13/41

Department of Civil Engineering viTasanCatiBhubeckeTskm5> lTPaBRTRTg;rbs;ssrenAelIKl; Bearing Capacity of Column atBase

bnkmkBIssrmanGMeBIelIeCIgtagenAKl;rbs;ssr EdlmanRkLapesI

nwgRkLapmuxkat;ssr. kMlaMgsgt;RtUv)anbBanmkssredaypal;edaybearing enAelIebtug. kMlaMgEdlmanGMeBIenAelIebtugenARtg;Kl;nssrminRtUvelIslTPaBRTRTg;rbs;ebtugEdlkMNt;eday ACI Code,Section 10.17

lTPaBRTRTg; )'85.0( 11 AfN c= !#>!&Edl 65.0= nig =1A RkLapbearing nssr. tMlnlTPaBRTRTg;EdleGay

edaysmIkar13.17

GacRtUv)anKuNedayemKuN0.2/

12 AA

sMrab;bearing

enAelIeCIgtagenAeBlpEdlRTFMCagRkLapbnkenARKb;RCug. 2A enATIenHCaRkLapnEpkneCIgtagEdlrUbFrNImaRtdUcKa ehIyRtYtsIuKaCamYynwgRkLapbnk rUbTI13>15. edaysarEt 12 AA > enaHemKuN 12 /AA nwgFMCagmYy EdlbgajfalTPaBRTRTg;GnuBaatekIneLIgedaysarTMrxagnRkLapeCIgtagEdlBTCMuvijKl;ssr. lTPaBRTRTg;kMEN modified bearing strength KW

( )11

212 '85.02)'85.0( Af

A

AAfN cc = !#>!*

RbsinebIbnkemKuN uP FMCag 1N b 2N EdkRtUv)andak;edIm,IbBankMlaMgelIs. eKGacTTYlva)anedaydak;Edk dowel bEdkssrRtUv)andak;bgscUleTAkgeCIgtag. kMlaMgelIsKW

1NPP uex = ehIyRkLaprbs;Edk dowel KW 1005.0)/( AfPA yexsd = Edl 1A CaRkLaprbs;muxkat;ssr. y:agehacNas;EdkbYnedImRtUv)aneRbIbYnedImenARCugTaMgbYnrbs;ssr.

RbsinebIkMlaMgemKuNtUcCag 1N b 2N enaHeKdak;EdkGb,brma. ACI Code, Section15.8.2 bgajfaRkLapEdkGb,brmarbs;Edk dowel y:agehacNas;es

Inwg gA005.0 nigminRtUv


14/41

T.Chhay NPIC

Footing 287

ticCagbYnedIm Edl gA CaRkLapeBj (gross section) rbs;muxkat;ssr. EdkGb,brmakRtUv)aneRbIEdrenAeBlEdlkMlaMgemKuNFMCag 1N b 2N . Edk dowel RtUv)andak;enARCugTaMgbYnrbs;ssr

ehIybgscUleTATaMgkgssr nigTaMgkgeCIgtag. Ggt;pitEdk dowel minKYrFMCagEdkbBarenAkgssr mm4 . tMrUvkarenHcaM)ac;edIm,IFanakareFVIkardlrvagssr nigeCIgtag. EdkbBasrbs;Edkdowel RtUv)anBinitemIledIm,IkMNt;nUvkarbBandlnkMlaMgsgt;eTAkgeCIgtag.

4>6> RbEvgEdkRCYs Development Length of the Reinforcing bars

muxkat;eRKaHfak;sMrab;RtYtBinitRbEvgEdkbgb;dUcKasMrab;m:Um:g;Bt;. RbEvgbgb;sMrab;

Edksgt;RtUv)aneGayenAkgemeronTI7

c

bydc

f

dfl

'

24.0=

b:uEnvaenHminRtUvtUcCag ybfd044.0 cm20 . sMrab;tMlepSgeToteyag tamemeronTI7.

4>7> sMrutDIepr:g;Esl karKNnaeCIgtagkglkxNlMnwgDifferential Settlement (Balanced Footing Design

CaTUeTAeCIgtagRTnUvbnkdUcxageRkam

-

bnkefrEdl)anmkBIeRKagxageRkam (substructure) nigeRKagxagelI(superstructure) .

-bnkGefrEdlGnuvtmkelI-TMgn;rbs;sMParEdleRbIsMrab;cak;bMeBj-bnkxl;

eCIgtagnImYyenAkgGKarRtUv)anKNnaedIm,IRTbnkGtibrmaEdlGacekItmanenAelIssr

Edl)anBIkarbnSMbnkdeRKaHfak;bMput edayeRbIsMBaFRTRTg;rbs;dIGnuBaat.


15/41

Department of Civil Engineering viTasanCatiBhubeckeTskm eCIgtagebtugsuT Plain Concrete Footings

eCIgtagebtugsuTGacRtUv)aneRbIedIm,IRTCBaaMg\dbbnkRsal nigbBalbnkTaMgenaHeTAdI

Edlva. ACI CodeGnuBaateGayeRbIeCIgtagebtugsuTenAelIdI RbsinkugRtaMgKNnaminRtUvFMCagkrNIxageRkam- kugRtaMgrgkarBt;GtibrmasMrab;karTajRtUvEttUcCagbesInwg 12/'5 cf Edl

55.0= - kugRtaMgGtibrmaenAkgkMlaMgkat;TTWgmYyTis (beam action)RtUvtUcCagbesInwg 9/'cf

Edl 55.0=

-

kugRtaMgGtibrmaenAkgGMeBIBIrTisKW


16/41

T.Chhay NPIC

Footing 289

cc ff '12

66.2'

9

2

9

1

+ Edl 55.0=

-

ersIusg;kMlaMgsgt;GtibrmaminKYrFMCagkarkMNt;rbs;lTPaBRTRTg;ebtugGnuBaat. cf' nebtugsuTminKYrtUcCag MPa17 .

-

kMras;Gb,brmarbs;eCIgtagebtugsuTminKYrtUcCag cm20 .- muxkat;eRKaHfak;sMrab;m:Um:g;Bt;KWsitenAprbs;ssr bCBaaMg.- muxkat;eRKaHfaksMrab;GMeBInkMlaMgkat;TTwgmYyTis nigkMlaMgkat;TTwgBIrTisKWsitenAcMgay

dnig 2/d BIpnssr bCBaaMg erogKa. eTaHbICaeCIgtagebtugsuTminRtUvkarEdkkedaykvaCakarEdlRbesIkgkardak;ssEdkrYmmaDsMrab;TisTaMgBIrrbs;eCIgtag.

-

kugRtaMgEdlbNalBIbnkemKuNRtUv)anKNnaedaysn

t;BRgayCaragbnat;enAkgebtug.- kMBs;RbsiTPaB dRtUv)anKitfaesInwgkMBs;srubdkeGay mm75 .-

sMrab;karBt;nigkMlaMgkat;mYyTis eRbImuxkat;eBj bh b:uEnsMrab;kMlaMgkat;BIrTis eRbI hbo edIm,IKNna cV .

]TahrN_ 3>

KNnaeCIgtagebtugBRgwgedayEdkedIm,IRTCBaaMgebtugEdlmanTTwg cm50 Edl

RTbnkefrmkN/5.379

EdlrYmbBalbnkpal;rbs;CBaaMg nigRTnUvbnkGefrmkN/292

. )atrbs;eCIgtagsitenACMerA m8.1 BInIv:UdI. eKeGay MPaf c 28' = / MPafy 400= nigsMBaFdIGnuBaat2/24024.0 mkNMPa= .

dMeNaHRsay

1>

KNnasMBaFdIRbsiTPaB. snt;kMBs;srubrbs;eCIgtagKW cm50 . TMgn;rbs;eCIgtagKW2

/5.12255.0 mkN= . edaysnt;TMgn;maDrbs;dIesInwg 3/16 mkN

enaHTMgn;dIbMeBjBIelIeCIgtagKW2/8.20)5.08.1(16 mkN=

.bnkCBaaMgEdlbgb;enAkgdIKW m1/)5.08.1(5.025 2/25.16 mkN= .bnkCBaaMgebtugbgt;kgdIKitCadI 2/4.101/)5.08.1(5.016 mkNm= .sMBaFdIRbsiTPaBenA)atrbs;eCIgtagKW 2/85.2004.1025.168.205.12240 mkN=+ .

2>

KNnaTTwgrbs;eCIgtagsMrab;CBaaMgRbEvg m1 TTwgrbs;eCIgtag = bnksrub sMBaFdIRbsiTPaB

pressuresoileffective

loaltotalfootingofwidth =


17/41

Department of Civil Engineering viTasanCatiBhubeckeTskm

sMBaFdIsuT= bnkemKuN TTwgeCIgtag sMrab;RbEvg m1 mkNLDPu /6.9222926.15.3792.16.12.1 =+=+=

sMBaFdIsuT (net upward pressure)= 2/4.2714.3

6.922mkNqu ==

4>epgpat;kMBs;snt;sMrab;tMrUvkarkMlaMgkat;TTwg. kMras;karBarEdksMrab;eCIgtagKW mm75 ehIysnt;eRbIEdk 25DB enaH mmd 4131275500 == . muxkat;eRKaHfak;sMrab;kMlaMg

kat;TTwgmYyTisKWsitenAcMgayd

BIpnBaaMgkN

cd

BqV uu 28.010

2

500413

2

34004.271

22

6 =

=

=

kMlaMgkat;TTwgmYyTisGnuBaat= 9.02817.0 =

dEdlRtUvkar mmbf

V

c

u 41519.075.0

280

'17.0=

==

kMBs;srubKW mm5021275415 =++ b mm500 . dCak;EsgKW mm4131275500 = dUckarsnt;.cMNaMfa eKnwgRtUvkarkarsakl,gmYycMnYnedIm,Isn

t;nigKNnatMl deGaymantMlEk,r.5>KNnam:Um:g;Bt;nigEdk. muxkat;eRKaHfak;KWsitenApnCBaaMg

mkNcB

qM uu .3.2852

5.0

2

4.3

2

4.271

222

122

=

=

=

MPabd

MR

uu 67.1

4131000

103.2852

6

2 =

==

sMrab; MPaRu 67.1= / MPaf c 28' = nig MPafy 400= enaHPaKryEdk

( )0048.0

2885.09.0

67.1211

400

2885.0

'85.0

211

'85.0=

=

=

c

u

y

c

f

R

f

f

PaKryEdkGb,brmasMrab;Ggt;rgkarBt;

0035.0400

4.14.1min ===

yf

PaKryEdkrYmmaDKW %18.0 sMrab; MPafy 400= . dUcenHeRbI 0048.0= dUcEdl)an

KNnammmAs /4.198241310000048.0

2==


18/41

T.Chhay NPIC

Footing 291

eRbIEdk 25DB EdlmanKMlat mm225 22182mmAs = 6>

RtYtBinitRbEvgEdkbgb;sMrab;Edk 25DB

mmdl bd 1200254848 === eyagtamemeronTI 7EdleGay

mmcB

ld 1375752

500

2

340075

22===

7> KNnaEdkrgkgTisedAbeNayeCIgtag mmmAs /90050010000018.0 2== eRbIEdk 16DB KMlat mm200 21005mmAs = . bg;lMGitRtUv)anbgajenAkgrUbTI13>16.

]TahrN_ 3>2

KNnaeCIgtag single footingedIm,IRTssrebtugeRbIEdkkgFmtasitenAxagkgEdleRbI 288DB . ssrenHRTnUvbnktamGkSGefrKanemKuN kN1090 nigbnkcMGkSefrKanemKuN kN890 . )atrbs;eCIgtagsitenACMerA mm1200 BInIv:UdIehIysMBaFdIGnuBaatKW 2/240 mkN .eKeGay MPaf c 28' = / MPafy 400= .dMeNaHRsay

1>KNnasMBaFdIRbsiTPaB. snt;kMras;srubrbs;eCIgtag mm600 . TMgn;eCIgtagKW 256.0 2/15 mkN= . bnkdIenABIelIeCIgtag snt;TMgn;maDrbs;dIesInwg 3/16 mkN KW 166.0 2

/6.9 mkN=

sMBaFdIRbsiTPaBKW= 2/4.2156.915240 mkN==


19/41

Department of Civil Engineering viTasanCatiBhubeckeTskmKNnaRkLaprbs;eCIgtagbnkeFVIkar kNLD 19808901090 =+=+=

RkLapeCIgtag 22.94.2151980 m== RCugrbs;eCIgtagKW m03.3= dUcenHeRbI m3= rUbTI13>17

3>sMBaFdIsuT= bnkemKuN RkLapeCIgtag

kNLDPu 27328906.110902.16.12.1 =+=+= sMBaFdIsuT (net upward pressure)= 2/6.303

33

2732mkNqu =

=

4>

epgpat;kMBs;sn

t;EdlbNalmkBIkMlaMgkat;TTwgBIrTis. RbsinebIeKGt;eRbIEdkkMlaMgkat;TTwg enaHkMlaMgkat;TTwgBIrTiskMNt;kMBs;caM)ac;rbs;eCIgtag. sMrab;kMBs;eCIgtagsrubsnt;

mm600 KNna d eTAGkSTIRbCMuTMgn;nEdkRsTab;xagelIedIm,Idak;enAkgeCIgtagTaMgBIrTis.eRbIEdk 15DB sMrab;KNna d.

mmd 4883775600 ==

vaCakarRbesIrEdlsn

t;112=hd

( ) ( ) mmdcbo 375248845044 =+=+=

mmdc 938488450 =+=+ ( ) ( ) kNdcqPV uuu 9.2464488.0450.06.3032732

222 =+=+=

1d caM)ac;oc

u

bf

V

'

3 2

= mm6.496

37522875.0

24649003=

= 1= smIkar !#>(

2d caM)ac;oc

os

u

bfb

d

V

'2

12 2

+

=

mm8.27537522823752

48840

75.0

246490012=

+

=

40=s sMrab;ssrenAkNal edaysar dd >1 snt;dUcenHeyIgRtUveFVIkarKNnasakl,grhUtdl; 1d nig dmantMlRbEhlKa. eRkayBIkarKNnamkeyIgTTYl)an

mmh 610= / mmd 498= / mmd 5.4951 = . dUcenH kMBs;snt;elIkeRkay mmh 610= RKb;RKan;.

5>RtYtBinitkMBs;EdlbNaledaysarGMeBIkMlaMgkat;mYyTis muxkat;eRKaHfak;enAcMgay dBIpssr


20/41

T.Chhay NPIC

Footing 293

cMgayBIcugeCIgtag mmdcL 77722

=

=

kNVu 7.7073777.06.3031 == kMBs;caM)ac;sMrab;kMlaMgkat;TTwgmYyTisKW

mmmmbf

Vd

c

u 49835030002817.075.0

707700

'17.075.0

1

KNnaEdk nigm:Um:g;Bt;. muxkat;eRKaHsitenApssr. cMgayBIcugeCIgtagKW

mmcL

1275225150022

==

mkNbcL

qM uu .3.7403275.16.303

2

1

222

1 22

==

=

MPa

bd

MR uu 995.0

4983000

103.740

2

6

2 =

==

BIsmIkar !#>!$ eyIg)an 0028.0= 22.418349830000028.0 mmbdAs ===

sA Gb,brma EdkrYmmaD 22 2.41832.268949830000018.0 mmmm RtYtBinitkugRtaMgRT (bearing stress)a. ersIusg;RT (bearing strength) 1N enA)atrbs;ssr 21 450450 mmA = KW

kNAfN c 7.3132104504502885.065.0)'85.0(3

11 ===

b. ersIusg;RT (bearing strength) 2N enApxagelIrbs;eCIgtag 22 33 mA = KW

11

212 2N

A

ANN =

22 9000000mmA = 21 202500mmA =

267.6202500

9000000>=

dUcenH kNNN 4.62652 12 == . edaysar 12732 NkNPu


21/41



22/41

T.Chhay NPIC

Footing 295

]TahrN_ 3>3 KNnaeCIgtagragctuekaNsMrab;ssrn]TahrN_TI13>2 RbsinebIRCugmYyrbs;eCIgtagRtUv)ankMNt;esI m6.2 .

dMeNaHRsay1>viFIsaRsKNnasMrab;eCIgtagctuekaNmanlkNRsedogKanwgkarKNnaeCIgtagkaer eday

KitBicarNaGMeBIrbs;kMlaMgmkelIeCIgtagtmaTisnImYydac;edayELkBIKa.2>BI]TahrN_mun RkLapcaM)ac;rbs;eCIgtagKW 22.9 m

beNayeCIgtag m54.36.2

2.9==

dUcenHyk m6.3 rUbTI13>18. TMhMeCIgtagKW 26.36.2 m

3>

kNPu 2732= . dUcenH sMBaFdIsuT(net upward pressure)KW2/9.291

6.36.2

2732mkNqu =

=

4>

RtYtBinitkMBs;EdlbNalBIkMlaMgkat;TTwgmYyTis. muxkat;eRKaHfak;sitenAcMgay dBIprbs;ssr. sMrab;TisedAEvg

bqdcL

V uu

=

221

kN4.8176.29.291498.0245.0

26.3 = = kMlaMgkat;TTwgenHlb;

sMrab;TisedAxI kNVu 3.6061 = mineRKaHfak;

dcaM)ac; mmbf

V

c

u 47526002875.0

104.8176

'

6 31 =

==

dEdleRbI mmmm 475498 >= 5> RtYtBinitGMeBIkMlaMgkat;TTwgBIrTis kMlaMgkat;pug (punching shear). muxkat;eRKaHfak;

enAcMgay 2/d BIpssrTaMgbYnRCug.( ) mmbo 37924984504 =+=

( ) mmdc 948498450 =+=+ 238.1

6.2

6.3


23/41



24/41

T.Chhay NPIC

Footing 297

202DB 2628mmAs = enAelIRbEvg m5.0 enAelIRCugnImYysgagcMerok m6.2 .cMnYnEdksrubKW19 edIm. enAkg]TahrN_enH EdkRtUv)anBRgayedayKMlatesIKa elIRbEvg

m6.3 / ( ) mmS 19218/1503600 == . bg;lMGitssrEdkRtUv)anbgajenAkgrUbTI!#>!*.

8>

RtYtBinitkugRtaMgRTenA)atssr dUcEdl)anBnl;enAkg]TahrN_mun. eRbIEdk dowel25DB cMnYn 4 edIm.

9> RbEvgbgb;rbs;Edkem mmld 960= sMrab; 20DB nig mmld 1344= sMrab; 28DB .

dl Edldak;TisEvg mm1500752

450

2

3600=

=

dl Edldak;TisxI mm1000=


25/41

Department of Civil Engineering viTasanCatiBhubeckeTskm4 KNnaRkLapeCIgtagcaM)ac;sMrab;sMrutesIKa karKNnaeCIgtagEdlmanlMnwg(balanced footing design) RbsinebIbnkGefrFmta (usual live load)esI %20

sMrab;RKb;eCIgtagTaMgGs;. eCIgtagrgnUvbnkefr nigbnkGefrdUcbgajenAkgtaragxageRkam.sMBaFdIsuTGnuBaat (allowable net soil pressure) esI 2/287 mkN .

elxeCIgtag1 2 3 4 5

bnkefr kN535 kN800 kN620 kN845 kN935

bnkGefr kN670 kN980 kN890 kN755 kN1070

dMeNaHRsay1>kMNt;eCIgtagEdlmanpleFobbnkGefrelIbnkefrFMCageK. enAkg]TahrN_enH eCIgtag

elx 3 manpleFob 44.1 FMCagpleFobdT.2>KNnabnkFmtasMrab;RKb;eCIgtagTaMgGs;. bnkFmtaKWCabnkefr nigEpknbnkGefr

EdlmanGMeBIrCaTUeTAenAelIeRKagsMNg;. enAkg]TahrN_enHbnkFmta ).(2.0. LLLD +=

tMlnbnkFm

taRtUv)anbgajenAkgtaragxageRkam.3>kMNt;RkLaprbs;eCIgtagEdlmanpleFob LDLL ./.

RkLapeCIgtagelx 3 226.5287

890620

pressuresoilallowable

..m

LLLD=

+=

+=

sMBaFdIFmtaeRkameCIgtagelx 3 KW2/7.151

26.5

798

footingofArea

loadUsualmkN==

4>

KNnaRkLapcaM)ac;sMrab;eCIgtagnImYyedayEckbnkFm

tarbs;vaedaysMBaFdIenAeRkameCIgtagelx 3. RkLaprbs;vaRtUvbgajenAkgtaragxageRkam. ]TahrN_eCIgtagelx 1RkLapcaM)ac;rbs;vaesI 241.47.151/669 m= .

5>

KNnasMBaFdIGtibrmaeRkameCIgtagnImYy2

max /287 mkNarea

LDq

+= sMBaFdIGnuBaat


26/41

T.Chhay NPIC

Footing 299

elxeCIgtag1 2 3 4 5

loadLiveloadDead 25.1 225.1 44.1 89.0 14.1

bnkFmta ).(2.0. LLLD += )(kN 669 996 798 996 1149 RkLapcaM)ac;

151.7

loadUsual= )( 2m 41.4 57.6 26.5 57.6 57.7

sMBaFdIGtibrmaarea

LD+= )/( 2mkN

2.273 9.270 87.2 5.243 9.264

]TahrN_ 3>5 KNnaeCIgtagebtugsuTedIm,IRTCBaaMgebtugEdlmankMras; mm400 . bnkEdlmanGMeBIelICBaaMgrYmmanbnkefr mkN/5.233 rYmbBalbnkpal;rbs;CBaaMgrYc nigbnkGefr

mkN/146 . )atrbs;eCIgtagsitenACMerA mm1200 BInIv:UdI. eKeGay MPaf c 20' = nigsMBaFdIGnuBaat 2/240 mkN .dMeNaHRsay

1>

KNnasMBaFdIRbsiTPaB. snt;kMBs;srubeCIgtagKW mm710

TMgn;rbs;eCIgtag 2/172471.0 mkN== edaysnt;TMgn;maDdIesI 3/16 mkN enaHTMgn;rbs;dIenAelIeCIgtagesI 16)71.02.1(

2/84.7 mkN= .sMBaFdIRbsiTPaBKW 2/16.21584.717240 mkN= .

2>

KNnaTTwgeCIgtagsMrab;CBaaMgRbEvg m1 mb 1=

pressuresoileffective

loadtotalfootingofwidth =

m76.116.215

1465.233=

+= yk m8.1 rUbTI13>19

3>

mkNLDU /8.5131466.15.2332.16.12.1 =+=+= sMBaFdIsuT(net upward pressure)esI 2/4.2858.1/8.513 mkNqu ==

4> RtYtBinitkugRtaMgBt;. muxkat;eRKaHfak;KWsitenApCBaaMg. sMrab;RbEvg m1 nCBaaMgnigeCIgtag

mkNcLqM uu .9.6924.0

28.14.285

21

2221

22

=

=

=


27/41

Department of Civil Engineering viTasanCatiBhubeckeTskm Combined Footings

enAeBlEdlssrmanTItaMgsitenAEk,rRBMenaHEpkneCIgtag single footingGaclycUleTAkgRBMGkCitxag. edIm,IeCosvagsanPaBEbbenH eKGacdak;ssrenAelIRCugEKmneCIgtagbegIt)anCabnkcakpit. eKminGaceRbIdMeNaHRsayenHsMrab;lkxNxH nigeBlxHvaCadMeNaHRsayEdlminsnSMsMc. karKNnadlGacTTYledalbBaleCIgtagCamYynwgeCIgtagssrxagkgEdlsit


28/41

T.Chhay NPIC

Footing 301

enACitCageK begIt)anCa combined footing. TIRbCMuTMgn;rbs;combined footing RtYtsIuKaCamYynwgkMlaMgpbnssrTaMgBIr.

krNIepSgeTot Edlcombined footingcaM)ac;RtUv)aneRbIKWenAeBlEdldImanlkNexSayehIyeCIgtagssrmYyKgelIeCIgtagenAEk,r. ragrbs;eCIgtag combined footingGacCactuekaNEkg bctuekaNBay rUbTI 13>20. enAeBlEdlbnkssrxagenAEk,rRBMmantMlFMCagbnkssrkg eCIgtagmanragctuekaNBayGacRtUv)aneRbIedIm,IrkSaTIRbCMuTMgn;eCIgtagenAelIExSCamYynwgbnkpbnssrTaMgBIr. CaTUeTA eKcUlciteRbIeCIgtagragctuekaNEkg.

beNay nigTTwgrbs;eCIgtagRtUv)aneRCIserIsedaykMeNInmg mm75 EdlGacbNaleGay

sMBaFBRgayes

IenAeRkameCIgtagERbRbYltUc. sMrab;sMBaFBRgayes

IeLIgelI(uniform upwardpressure)eCIgtagnwgdabdUcbgajenAkgrUbTI13>21. ACI Code, Section 15.10min)anpl;nUvviFIKNnalMGitsMrab; combined footingeT. CaTUeTA karKNnaQrelIkarviPaKeRKOgbgM (structuralanalysis).


29/41

Department of Civil Engineering viTasanCatiBhubeckeTskm22. eKkGaceRbITTwgEdlmantMltUcCagrhUtdl; dc+ .

]TahrN_ 3>6 KNnaeCIgtag combined footingragctuekaNEkgedIm,IRTssrBIrdUcbgajkgrUbTI 13>23. ssrxagelx Imanmuxkat; mm400400 nigRTnUv ..LD kN800 nig LL. kN535 .ssrxagkgelx IImanmuxkat; mm500500 nigRTbnk ..LD kN1115 nig LL. kN625 . sMBaFdIGnuBaatKW 2/240 mkN ehIy)atrbs;eCIgtagsitenACMerA m5.1 BInIv:UdI. KNnaeCIgtagedayeRbI

MPaf c 28' = / MPafy 400= nigviFIKNnaersIusg; ACI.

dMeNaHRsay

1>kMNt;TItaMgkMlaMgpbnbnkssr. Kitm:Um:g;CMuvijGkSnssrxagelx I

mx 7.2772)535800()6251115(

4900)6251115(=

+++

+= BIssr I

cMgayBIkMlaMgpbmkExSRBMKW mm7.33726007.2772 =+ . RbEvgrbs;eCIgtagKWmm4.674527.3372 = yk mm6750 . kgkrNIenHkMlaMgpbrbs;ssrRtYtsIuKaCamYy

nwgkMlaMgpbrbs;sMBaFdIEdlmanGMeBIelIeCIgtag.

2>

kMNt;RkLaprbs;eCIgtag. sn

t;kMBs;eCIgtagsrub mm920 mmd 805115920 ==


30/41

T.Chhay NPIC

Footing 303

bnkeFVIkarsrub kN30756251115535800 =+++= Total actual (working)loadsMBaFdIfI 2/72.2071658.02592.0240 mkN== New upward pressure

sn

t;TMgn;maDdI 3/16 mkN RkLapcaM)ac; 28.14

72.207

3075m== Required area

TTwgeCIgtag m19.275.6

8.14== Width of footing

ykTTwgeCIgtagesI m2.2 . dUcenHTMhMeCIgtagKW m2.275.6 RkLap 285.14 m 3>kMNt;sMBaFdIemKuN factored soil pressure edayeRbIbnkemKuN

1uP

ssrelxI

kN18165356.18002.1 =+=

2uP ssrelx II kN23386256.111152.1 =+=

sMBaFdIemKuNsuTKW ( ) 2/73.27985.14/23381816 mkNqu =+= net factored soilpressure

4>KUrdaRkamkMlaMgkat;TTwgemKuNsMrab;FwmEdlmanRbEvg mmL 6750= EdlenAelIssrBIrnigrgnUvsMBaFdI mkN/4.6152.273.279 = kgRbEvgeCIgtag m1

uV

enApxageRkArbs;ssrI

kN16.246)2.06.0(4.615 ==

uV enApxagkgrbs;ssr I ( ) kN68.13232.06.04.6151816 =+=

uV enApxageRkArbs;ssr II kN4.615)25.025.1(4.615 ==

uV enApxagkgrbs;ssr II kN9.1414)25.025.1(4.6152338 =+= 5>KUrdaRkamm:Um:g;emKuNedayKiteCIgtagCaFwmEdlman mmL 6750= RTedayssrBIr.

sMBaFdIBRgayesI mkN/4.615

1uM enApxageRkAssr I mkN.2.4924.0

4.615

2

== 2uM enApxagkgssr II mkN.7.307

2

14.615

2

==

m:Um:g;GtibrmaekItmanenAkMlaMgkat;TTwgesIsUn

uM GtibrmaKNnaBIssr I ( ) ( )26.02.015.22

4.6152.015.21816 +++=

mkN.84.1589=

uM

GtibrmaKNnaBIssrII

( ) ( )2

25.125.03.22

4.61525.03.22338 +++=


31/41


RtYtBinitkMBs;sMrab;kMlaMgkat;mYyTis. kMlaMgkat;TTwgGtibrmaekItmanenAcMgaymmd 805= BIpssrxagkg II rUbTI 13>23.

kNVu 5.919805.04.6159.14141 == mm

bf

Vd

c

u 5.61928220017.075.0

919500

'17.0

1 =

==

kMBs;RbsiTPaBEdleGayKW mmmmd 5.619805 >= dUcenHeCIgtagmanlkNRKb;RKan;.7>RtYtBinitkMBs;sMrab;kMlaMgTTwgBIrTis kMlaMgkat;pug. sMrab;ssrxagkg

( ) ( ) mmdcbo 522080550044 =+=+= ( ) ( ) mmdc 1305805500 =+=+ kMlaMgkat;TTwg 2uV enAmuxkat; 2/d BIRKb;RCugrbs;ssresI

kNdcqPVuuu

6.1861305.173.2792338)( 22

22

==+=

mmmm

bf

Vd

oc

u 8056.26952202875.0

18616003

'

3 2

RtYtBinitkMBs;sMrab;m:Um:g;nigkMNt;ssrEdkcaM)ac;enAkgTisEvgm:Um:g;Bt;Gtibrma mkN.84.1589=

MPa

bd

MR uu 115.1

8052200

1084.15892

6

2 =

==

GnuvtkgsmIkar !#>!$ PaKryEdkKW ( )min0033.00032.0 = 23.584480522000033.0 mmAs ==

sA Gb,brma rYmmaD 22.364392022000018.0 mm== 23.5844 mmAs = lb;. eRbI 2810DB 25.6157 mmAs =

KMlatEdk mm228spacing)of(no.9

cover)(concrete1502200=

=


32/41

T.Chhay NPIC

Footing 305

EdkRtUv)andak;bgtenAcenaHssrenAEpkxagelIeCIgtagCamYykMras;karBarEdk mm75 .dak;EdkGb,brmaenA)atrbs;eCIgtagedIm,ITb;nwgm:Um:g;viCman. RtYtBinitRbEvgbgb; dl BIp

ssr.EdkGb,brmaKW 22.3643 mmAs = . eRbI 258DB 23927mmAs = .RbEvgEdkbgb;caM)ac;sMrab;EdkemxagelIKW mmdl bd 1747483.13.1 == RtUv)andak;ecjBIcMnucm:Um:g;Gtibrma. RbEvgEdkbgb;Edldak;enARtg;ssrTaMgBIrKWRKb;RKan;.

9>sMrab;EdkenAkgTisedAxI. karKNnam:Um:g;Bt;enAkgTisedAxITisedATTwg maklkNdUcKakgkrNIsingle footing. EdkenAeRkamssrnImYy RtUv)andak;enAkgcMerokTTwg

(bandwidth) Edles

InwgplbUkTTwgssrnigkMBs;RbsiTPaB dBIrdg rUbTI!#>@$.a.

EdkenABIeRkamssr IBandwidth 805column)ofsideexterior(on040dth)(column wi400 ++=

mm1605= eRbI m6.1 . sMBaFdIeLIgelIsiTenAkgTisedAxIeRkamssr IKW

mkNPu /5.825

2.2

1816

footingofwidth

1 ==

cMgayBIcugTMenreTApssrKW mm900240022200 =

uM enApnssr I mkN.3.3349.02

5.825 2 ==

MPabd

MR uu 32.0

8051600

103.3342

6

2 =

==

PaKryEdk tUcCagPaKryEdkGb,brmasMrab;EdkrYmmaD 0018.0 .2

min 6.264992016000018.0 mmAs ==

eRbI 256DB 22.2945 mmAs = dak;enAkgbandwidthRbEvg m6.1 .b.

EdkenABIeRkamssr IIBandwidth mm2110805805500 =++=

eRbI mm2100 . sMBaFdIeLIgelIsiTenAkgTisedAxIeRkamssr IIKW

mkNPu /7.1062

2.2

2338

footingofwidth

2 ==

cMgayeTApssrKW mm8502

500

2

2200=

uM enApnssr IIkgTisedAxI mkN.9.38385.02

7.1062 2 ==


33/41

Department of Civil Engineering viTasanCatiBhubeckeTskm@# nig !#>@$. RbEvgbgb;rbs;Edk 25DB enAkgTisedAxIKW m2.1 .


34/41


35/41

Department of Civil Engineering viTasanCatiBhubeckeTskm@!

2>enAeBl 6// LPMe == sMBaFdImanragctuekaNEkg

LB

P

BL

M

LB

Pq

262max

=+= !#>@@

2min

60

BL

M

LB

Pq == b

2

6

BL

M

LB

P= !#>@#

3>

enAeBlEdl 6/Le> sMBaFdImanragRtIekaN

eLyL

x =

= 23


36/41

T.Chhay NPIC

Footing 309

Bx

qP

=

2

3max

)2(3

4

3

2max

eLB

P

xB

Pq

== !#>@$

4> enAeBleCIgtagRtUv)anrMkilcMgay e BIGkSnssredIm,IbegItsMBaFdIBRgayesIenAeRkameCIgtag. m:Um:g;GtibrmaekItmanenAmuxkat; nn

HhMM = ' nigP

Me=

8> eCIgtageRkamm:Um:g;BIrTis Footings under Biaxial Moment

enAkgkrNIxH eCIgtagGacrgnUvkMlaMgtamGkSnigm:Um:g;Bt;BIrTisCMuvijGkSx

nigGkSy

dUckrNIm:asIunscEdlbgVilxn)an o360 . enaHeCIgtagRtUv)anKNnasMrab;bnkeRKaHfak;.tamrUbTI 13>26 RbsinebIbnkcMGkS P manGMeBIenAcMgay xe BIGkSy nig ye BIGkSx .

enaH

yx PeM = nig xy PeM =

sMBaFdIenARCug ! KWy

xy

x

yx

I

cM

I

cM

A

Pq ++=max

enARCug @ KWy

xy

x

yx

I

cM

I

cM

A

Pq +=2

enARCug # KWy

xy

x

yx

I

cM

I

cM

A

Pq =3

enARCug $ KWy

xy

x

yx

I

cM

I

cM

A

Pq +=4


37/41

Department of Civil Engineering viTasanCatiBhubeckeTskm7 ssrctuekaNEdlmanmuxkat; mm600300 dUcbgajkg rUbTI13>27 argnUvbnkcMGkS kNPD 980= nigm:Um:g; mkNMD .244= EdlbNalBIbnkefr nigbnkcMGkS

kNPL 734= nigm:Um:g; mkNML .190= EdlbNalBIbnkGefr. )atrbs;eCIgtagsitenACMerAm5.1 BInIv:UdIehIysMBaFRTRTg;dIGnuBaatKW 2/240 mkN . KNnaeCIgtagedayeRbI MPaf c 28' = /

MPafy 400= .dMeNaHRsay

eCIgtagrgnUvbnkcMGkSnigm:Um:g;kNP 1714734980 =+=

mkNM .434190244 =+= cMNakpitKW m

P

Me 253.0

1714

434=== yk mm250

eKGacKNnaeCIgtagtmaviFIsaRsBIrKWviFIsaRsTI1 rMkilGkSeCIgtagcMgay mme 250= BIGkSssr. kgkrNIenH sMBaFdIRtUv)an

cat;TukfaBRgayes

IenABIeRkameCIgtag rUbTI 13>27b.viFIsaRsTI2 GkSrbs;eCIgtag nigGkSrbs;ssrRtYtsIuKa. kgkrNIenH sMBaFdImanragCa

RtIekaN bctuekaNBay rUbTI 13>27 c ehIytMlGtibrma nigGb,brmaRtUv)anKNnadUcbgajenAkgrUbTI13>27.

karGnuvtn_nviFIsaRsTaMgBIrsMrab;]TahrN_TI13>7 GacnwgBnl;y:agsegbdUcxageRkam1> sMrab;viFIsaRsTI1 snt;kMBs;eCIgtag mm500 mmd 420= nigsnt;TMgn;maDdIesI

3/16 mkN sMBaFdIeLIgelIsuTKW 2/5.211161255.0240 mkN=

RkLapeCIgtag 21.85.211

1714m==

snt;TTwgeCIgtagKW m7.2 enaHeCIgtagmanbeNay m37.2/1.8 = . dUcenHeyIgeRCIserIseCIgtagEdlmanTMhM m37.2 nigssrmanTItaMgcakpitdUcbgajkgrUbTI 13>27 d. GkS

eCIgtagmancMgaymm250

BIGkSssr.


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T.Chhay NPIC

Footing 311

2> \LvviFIsaRsKNnamanlkNRsedogKanwgkarKNnaeCIgtageTal (single footing).RtYtBinitkMBs;eCIgtagsMrab;GMeBIkMlaMgkat;TTwgmYyTis nigkMlaMgkat;TTwgBIrTis. kMNt;m:U

m:g;Bt;enApssrsMrab;TisxInigTisEvg. edaysarcMNakpitrbs;eCIgtag muxkat;eRKaHfak;nwgsitenAxageqVgnpssr dUcbgajkgrUbTI13>27 d. cMgayeTAcugeCIgtagKW mm1450

kNLDPu 4.23507346.19802.16.12.1 =+=+= 2/2.290

37.2

4.2350mkNqu =

=

m:Um:g;Gtibrma mkNMu .7.8232

45.17.22.290

2

== enAelITTwg m7.2

enAkgTisedAxI mkNMu .8.62622.1

32.290

2

== BinitelIgvijkMBs;eCIgtagEdl)ansnt;RbsinebIcaM)ac;nigeRCIserIsbrimaNEdkcaM)ac;enAkgTisTaMgBIrrbs;eCIgtag dUcEdl)anBnl;enAkg]TahrN_GMBIeCIgtageTal (single footing).

3> sMrab;viFIsaRsKNnaTI2 KNnaRkLaprbs;eCIgtagtamviFIdUcEdl)anBnl;enAkgviFIsaRsTI1 bnab;mkKNnasMBaFdIGtibrma nigeRbobeFobvaCamYynigsMBaFdIGnuBaatEdleRbIbnkFmta

bnksrub kNP 1714= TMhMrbs;eCIgtag m37.2 = edaysarcMNakpitKW mmLmme 5006/30006/250 ===

+

=+=

eCIgtagKansuvtiPaB. sakl,g m48.2 RkLap 22.11 m= 22

22max/5.211/2.211

48.2

4346

48.2

17146mkNmkN

BL

M

LB

Pq KNnasMBaFeLIgelIemKuNedayeRbIbnkemKuN bnab;mkKNnam:Um:g; nigkMlaMgkat;TTwg dUcBnl;kg]TahrN_mun.


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Department of Civil Engineering viTasanCatiBhubeckeTskm kMralxNelIdI Slabs on Ground

kMralxNebtugEdldak;pal;elIdIGacnwgrgnUv- bnkBRgayesIenAelIprbs;va EdlbegIt)anCakMlaMgkgtUc


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T.Chhay NPIC

Footing 313

- bnkcMcMnuc bbnkBRgayminesIEdlbegItm:Um:g;Bt;nigkMlaMgkat;. kugRtaMgkMlaMgTajekIteLIg ehIysameRbHnwgekItmanEpkxHrbs;kMralxN.

kugRtaMgTajCaTUeTAekItmanedaybnSMn- karrYj (contraction)EdlbNalmkBIsItuNPaB nigkarrYmmaD EdlbgaMgedaykMlaMgkkit

rvagkMralxNnig subgradebegItCakugRtaMgTaj.- karxUcragmuxkat;rbs;kMralxNedaykarmYl (warping of the slabe).- lkxNnkardak;bnk- sMrut

tMN contraction joint RtUv)anbegIteLIgedIm,Ikat;bnykugRtaMgTajenAkgkMralxN. tMNexpansion joint RtUv)andak;kMralxNesIgEdlmankMras;rhUtdl; mm250 .

kMralxNCan;eRkamdIneRKagsMNg;GKarsak;enAGacCaebtugGarem:EdlmankMras;BI mm100 eTA mm150 EdlBRgwgedaysMNaj;Edk. sMrab;XaMg kMralxNGacmankMras;BI mm150 eTA

mm300 GaRsyelIbnkenAelIkMralxN. kMralxNCan;eRkamdIRtUv)anKNnaedIm,ITb;nwgsMBaFdIeLIgelInigsMBaFTwk. RbsinebIkMralxNsitenAelIdIEdlmanlkNesrPaB bENn(incompressible soil) enaHsMrutDIepr:g;EslRtUv)anecal. kgkrNIenH kMras;kMralxNGacGb,brmaRbsinebIKanRsTab;TwkeRkamdI. RbsinebIsMrutDIepr:g;EslFMenaHkMralxNRtUv)anKNnaCastiff raft foundation.

10> eCIgtagenAelIssrRKwH Footings on Piles

enAeBlEdlRsTab;dImanlkNTn;enAkgkMras;dRkas;ehIylTPaBRTRTg;rbs;vatUc eKnwg

minENnaMeGaydak;eCIgtagedaypal;enAelIdIeT. vaCakarRbesIrkgkarbBankMlaMgtamssrRKwHeTARsTab;deRCAEdlmanlkNrwgRKb;RKan;edIm,IRTbnk bbegItkMlaMgkkitRKb;RKan;CMuvijpxagssrRKwH.

ssrRKwHCaeRcInRbePTRtUv)aneRbIsMrab;RKwH. kareRCIserIsssrRKwHGaRsyelIlkxNdI/vtmanRsTab;TwkeRkamdI/ tYrnaTIrbs;ssrRKwH nigfvikar. ssrRKwHGaceFVIBI ebtug Edk beQI.

CaTUeTA eCIgtagssrRKwH (pile cap) mansarsMxan;kgkarEbgEckkMlaMgBIssreTAk,al

ssrRKwH. eCIgtagssrRKwH (pile cap)RtUvmanTMhMRKb;RKan;edIm,IQrelIssrRKwH. eCIgtagssrRKWH


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បេតុងពង្រឹងដោយដែក 13 xiii-footings