【英文标准名称】:StandardTestMethodsforDeepFoundationsUnderStaticAxialCompressiveLoad
【原文标准名称】:静态轴向压力载荷下深地基的标准试验方法
【标准号】:ASTMD1143/D1143M-2007e1
【标准状态】:现行
【国别】:美国
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D18.11
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:axialstaticpilecapacity;fieldtesting;jack;loadcell;loadingprocedure;referencebeam
【摘要】:Fieldtestsprovidethemostreliablerelationshipbetweentheaxialloadappliedtoadeepfoundationandtheresultingaxialmovement.Testresultsmayalsoprovideinformationusedtoassessthedistributionofsideshearresistancealongthepileshaft,theamountofendbearingdevelopedatthepiletoe,andthelong-termload-deflectionbehavior.Afoundationdesignermayevaluatethetestresultstodetermineif,afterapplyinganappropriatefactorofsafety,thepileorpilegrouphasanultimatestaticcapacityandadeflectionatserviceloadsatisfactorytosupportaspecificfoundation.Whenperformedaspartofamultiple-piletestprogram,thedesignermayalsousetheresultstoassesstheviabilityofdifferentpilingtypesandthevariabilityofthetestsite.Iffeasible,withoutexceedingthesafestructuralloadonthepile(s)orpilecap,themaximumloadappliedshouldreachafailureloadfromwhichtheEngineermaydeterminetheultimateaxialstaticcompressiveloadcapacityofthepile(s).Teststhatachieveafailureloadmayhelpthedesignerimprovetheefficiencyofthefoundationbyreducingthepilinglength,quantity,orsize.Ifdeemedimpracticaltoapplyaxialtestloadstoaninclinedpile,theEngineermayelecttouseaxialtestresultsfromanearbyverticalpiletoevaluatetheaxialcapacityoftheinclinedpile.Note18212;Thequalityoftheresultproducedbythistestmethodisdependentonthecompetenceofthepersonnelperformingit,andthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting/sampling/inspection/etc.UsersofthistestmethodarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliableresults.Reliableresultsdependonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Thetestmethodsdescribedinthisstandardmeasuretheaxialdeflectionofaverticalorinclineddeepfoundationwhenloadedinstaticaxialcompression.Thesemethodsapplytoalldeepfoundations,referredtohereinaspiles,thatfunctioninamannersimilartodrivenpilesorcastinplacepiles,regardlessoftheirmethodofinstallation,andmaybeusedfortestingsinglepilesorpilegroups.Thetestresultsmaynotrepresentthelong-termperformanceofadeepfoundation.1.2Thisstandardprovidesminimumrequirementsfortestingdeepfoundationsunderstaticaxialcompressiveload.Plans,specifications,and/orprovisionspreparedbyaqualifiedengineermayprovideadditionalrequirementsandproceduresasneededtosatisfytheobjectivesofaparticulartestprogram.Theengineerinresponsiblechargeofthefoundationdesign,referredtohereinastheEngineer,shallapproveanydeviations,deletions,oradditionstotherequirementsofthisstandard.1.3Thisstandardallowsthefollowingtestprocedures:nbsp;nbsp;nbsp;ProcedureA
QuickTest
ProcedureB
MaintainedTest(optional)
ProcedureC
LoadinginExcessofMaintainedTest(optional)
ProcedureD
ConstantTimeIntervalTest(optional)