关于静压桩终压条件的探讨

1004-6410(2002)03-0054-04李佑铭(,530031):,,:;;;:TU473.1:B:2002-07-21:(1968-),(),,0,,,,1,1.1,1.2,:,;,1.3,()1.4(Quk)(Pcr)1.51.61.7133Vol.13No.320029JOURNALOFGUANGXIUNIVERSITYOFTECHNOLOGYSep.20021.81.91.102,;,,,,,,,::Pjmax1.1fcAp(1)PHC:Pjmax0.45(fce-PC)Ap(2)Pfmax1.1Pjmax(3)Pjmax;Pfmax;fc;fce,PHC80Mpa;PCAABBC4.0N/mm26.0N/mm28.0N/mm210.0N/mm25%,;Ap,,,1.5m12m,,(1)(2),,(01.5m),,(3),(3),(3),20m10m,(DGJ08-11-1999)[1],(,)::Rd(0.600.75)fcAp[1](4):Rd(0.600.75)fcAp-0.34ApPC[1](5)Quk=1.6Rd,Pmax(510),Quk(),Pmax=1.1Quk:Pmax(1.0561.32)fcAp(6):Pmaxx(1.0561.32)fcAp-0.598ApPC(7)(6)(7)()(1)(3)(6),(1),(3)Pfmax1.2PjmaxC80fce=2.133fc(fck=(0.900.975)0.67fce,fck=1.35fc,fce=80N/mm2,fc=37.5N/mm2),(2):Pjmax0.96fce,AP-0.45pcAP(8)553:(8)(3)(7),(2),(3)Pfmax1.2Pjmax,,[2],::Pjmax1.1fcAP(9):Pjmax0.45(fce-PC)AP(10)20m:Pfmax1.1Pjmax(11)20m:Pfmax1.2Pjmax(12),=1.0,(JGJ94-94),,50kPa10kPa3:3.1(8)(9)(10)(11)(Qu):6mL8m,Quk=(0.600.80)Pu8mL15m,Quk=(0.701.0)Pu15mL23m,Quk=(0.851.0)PuL23m,Quk=(1.01.15)Pu,300,,2402801000kN350mm1m,1200kN400mm1m,,,,400600,,400mm400mm(C30,15m),3800kN,1,,5,:3400kN,C35,13m(),,5,,,,03.2m,8.5m,,3m5m!,,13m3m,,14.5400mm400mmC30C35,3600kN(18Mpa),,18Mpa,,,12Mpa(),,18Mpa,3cm,5620029,1cm3600kN,,,(),400PHC,16m18m,3700kN,12m,2550kN,3.23000KN5S,1min3min,3.3,3,8m5,(kN)(mm)2PjmaxPfmax(20m)Pfmax(20m)202022202430350350C30C35C40236025902830263028903150264029003170400400C30C35C40308033903700343037804120413045404950500500C30C35C40481053005780536059006440PHC300-A(70mm)173019002070PHC400-A(95mm)311034203730PHC500-A(100mm)430047305160PHC500-A(125mm)503055306030PHC600-AB(105mm)543059706510:∀,(),#,∃APC4Mpa,ABPC6Mpa(下转第61页)3.410mm100mm,,,,,,,,,,,3.5(JGJ94-4)[3](),,,:∀,;#();∃3.64,,,573:Abstract:Temperaturecontroltechniqueiswidelyusedinbulkyconcrete.Andbycontrollingthetempera-tureofthebulkyconcrete,thechangesofthetemperatureinsidethebulkyconcretemaybeknownintime,sothatappropriatemeasurescanbetakentoensurethequalityofbulkyconcrete.Keywords:bulkyconcrete;temperaturecontroltechnique;application(上接第57页)[][1]DGJ08-11-1999,[S].[2]DB45/T36-2002,()[S].[3]JGJ94-94,[S].AdiscussionabouttheconditionofstoppressingforpileswithstaticpressureLIYou-ming(NanningArchitecturalandInstallationalEngineeringCompany,GuangxiNanning530031,China)Abstract:Thedeterminationoftheconditionofstoppressingforpileswithstaticpressureisthekeytech-niquefortheconstructionofpileswithstaticpressuresomerealprojectsareusedtostudytheselectinganddeterniuningoftheendpressurevlaueanditscalculation,anddecideonrelativelyreliableconditionsofstoppressing.Keywords:steadypressing;methodofovercapacitypressing;endpressurevalue;conditionofstoppressing613: