地基承载力计算方法与地基设计应用分析_孙宏伟

451820159BuildingStructureVol．45No．18Sep．20151211000452100048。。。。TU470A1002-848X201518-0101-04AnalysisoncomputationformulaeforsubgradebearingcapacityappliedingeotechnicalandfoundationdesignSunHongwei1FengHaiyue21BeijingInstituteofArchitecturalDesignBeijing100045China2ChinaInstituteofBuildingStandardDesign＆ＲesearchBeijing100048ChinaAbstractThedeterminationofsubgradebearingcapacityshouldconsidersubgradestrengthandsubgradedeformationcontrol．Thesubgradedesignideainfoundationdesignprocesswasdiscussedandtheevolutionoftermsforsubgradebearingcapacitywasintroducedaswellascalculationmethodsofsubgradebearingcapacity．Thecalculationformulasofsubgradebearingcapacitycorrectioncoefficientsforthefoundationwidthanddepthweregiven．Throughthecaseanalysisthecomprehensiveapplicationsofdifferentcalculationmethodsofsubgradebearingcapacitywereemphasized．Itishopedthatthestudycanbehelpfultodesignersinunderstandingandcomprehensiveapplyingthecalculationmethodsofsubgradebearingcapacityinfoundationdesign．Keywordsgeotechnicaldesignallowablebearingca[e-mail]。0。。。、、。1。1。。。、、。1。2。。21974、1989、200220114。。《》TJ7—74。1989《》GBJ7—8920153。《》GBJ7—89f0、fkf。2002《》GB50007—200242002———characteristicvalueofsubgradebearingcapacity。fakfa。32002《》GB50007—201152011faa“allowablebearingcapacity”。《》DBJ11-501—20096。3“、、”。。。。fakfa。。。BowlesJE2“Totreatthedesignsoilparametersparameters—obtainedfromsoiltestsofvariablequalityheavilysupplementedwithengineeringjudgment—asprecisenumberswhosemagnitudeistotallyinviolable”———。———。。7“”。。1。③-2fak220kPa。。0.8040.658.5MPa89fak190～210kPa。1⑤。③-2fakfak=160kPa③-2。。4fafa2014518．fa1fa2fa3fa。4.1fa、fak3m0.5mfa=fak+ηbγb－3+ηdγmd－0.51ηbηd20115.2.42011。、。ηdηd=0φ≤10°1K+π+22Ktan2π4+φ()2－[]110°＜φ＜37°4.4φ≥37°{2KK=2φφk。ηb、、ηb=0φ＜15°π4cotφ－π2+()φφ≥15°{3、ηb=1K·π+22tan2π4+φ()2－[]14K=3。、φ22°ηb=0。4.2fa2011e0.033fafa=Mbγb+Mdγmd+Mcck5MbMdMc20115.2.5ck。。4.3fafafa=fuK6fu。fuVesicHansen。K2～3K=3。。5。10。ΔsΔs=s1－s27s1s2。7。s1s2。s215。2。d=1.0mb=3mγm=20kN/m3。1fa=180+1.6×20×1－0.5=196kPa5fa=3.06×20×1+5.66×40=287.6kPa301201525fa1fa46.7%。5fa。6fa111。217、24312。、“”。61。2。3。4。5。、、。1．M．1994．2BOWLESJE．FoundationanalysisanddesignM．5thed．NewYorkMcGraw-Hill19972．3．《》C//．2003637-640．4GB50007—2002S．2002．5GB50007—2011S．2012．6DBJ11-501—2009S．2009．7．J．200439-12．8DBJ15-31—2003S．2003．9DBJ13-07—2006S．2006．10．M．2007．11．J．2003343207．12．J．20053573-6．《》“”《》《》2014。74。506514728。3700。1983。《》7“”。401