广渝高速公路预应力t梁张拉施工方案

:100926825(2002)0220151202T:2001211229:(19662),,1989,,,041000:T,,,,,,:,,T,:U44514:AT,30m,,9,245,,1:,6%6%,,,111L=PLTAPES:P,;AP;Es;LTP=P+P[1-(KLT+U)]2=P(1-KLT+U2),AP=2419.625=471mm2,ES=2.0105NPmm2,K=0.0015,LT,U=0.25,123:=9=0.157radP=P(1-KLT+U2)=54.169.8(1-0.001531.32P2+0.250.1572)2),,,3),,,212121),,200t,2),,21213a1,,,b1,c1,,,20cm30cm,,,21214a1,,,,b1:,8cm10cm,c1,,d1,20cm30cm,,,,e1,,3,ThereasonanalysisandcontrollingmeasuresfortheerrorgeneratedinframedrivingYANGHai2hong(TheSecondEngineeringCo.Ltd.ofThe12thEngineeringBureauofChinaRailway,Taiyuan030032,China)Abstract:Thestressoftheframeinthedrivingcontainingtheconditionsontheoperatingslideanddepartingfromtheslideareanalyzed.Themainrea2sonsofvariationofaltitudeanderrorinlineareanalyzedconcretelyandthecausingelementsforthoseerrorsareproposed.Andsomepreventiveandcontrollingmeasuresareproposedtopreventandcorrectthoseerrorsintowaspectsofpreparestageandconstructiondrivingstage.Thispaperhavesomereferencevaluefordrivingconstruction.Keywords:framedriving,error,reason,controllingmeasure15128220022SHANXIARCHITECTUREVol.28No.2Feb.2002©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.=514.12kNL1=0.8514.1231.321034712.0105=0.1367m=136.7mmL=170.97mm171mm456789:=8=0.140radP=55.589.8(1-0.001531.16P2+0.250.1402)=55.589.8(1-0.0292)=528.78kNL1=0.8528.7831.161034712.0105=0.1399m140mmL=175mm112,L:L=L1+L2+C:L1;L2;C():20%conL2,,12,1.5,2%,3311,,,,,312:,:O0.2con1.05con(5min)0.8con1.0con()313,()314,,,315,316,317,30mm,40,,,,4411,42540,0.4,3h,2%,4%,0.25%FDN,,,()412:,0.4MPa0.6MPa(),,,,,,0.5MPa0.6MPa,()413,,414,,()41551)a1:;b1:2)(),:()3)4):5)ThetensionconstructionplanofprestressedT2beamofGuangyuexpresswayWEIJian2lei(TheFirstCompanyofThe12thEngineeringBureauofChinaRailway,Linfen041000,China)Abstract:Thepaperintroducesconstructioncircumstancesbythepost2tensionmethodoftheprestressedT2beaminGuangyuExpressway.Theengineer2ingsituations,theacceptancecheckoftheanchorage,thecoordinatedcheckoftensionequipmentsandtheacceptancecheckofconcretecomponentsarestatedsimply.Thecontrollingmethodofpresterssvalueandthetensionprocessofprestressedbarsarediscussedindetail.Theaccordingsafetymeasuresareadoptedtoreachthecriterionsofqualitychecking.Keywords:prestress,prestressvalue,T2beam,tensionoperation25128220022©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.