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【英文标准名称】:StandardTestMethodforLowStrainImpactIntegrityTestingofDeepFoundations
【原文标准名称】:深层地基的低应变冲击完整性测试用标准试验方法
【标准号】:ASTMD5882-2007
【标准状态】:现行
【国别】:
【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】:力;冲击;倾斜的;完整性;低;机械测试;桩;岩石;强度试验;测试;试验;速度
【英文主题词】:force;impact;integrity;low-strain;nondestructive;piles;pulseecho;velocity;sonicecho
【摘要】:Lowstrainimpactintegritytestingprovidesaccelerationorvelocityandforce(optional)dataonslenderstructuralelements(thatis,structuralcolumns,drivenconcretepiles,castinplaceconcretepiles,concretefilledsteelpipepiles,timberpiles,etc.).Themethodworksbestonsolidconcretesections,andhaslimitedapplicationtounfilledsteelpipepiles,Hpiles,orsteelsheetpiles.Thesedataassistevaluationofpileintegrityandpilephysicaldimensions(thatis,cross-sectionalarea,length),continuity,andconsistencyofthepilematerial,althoughevaluationisapproximateandnotexact.Thistestmethodwillnotgiveinformationregardingthepilebearingcapacity.4.1.1MethodsofTesting4.1.1.1PulseEchoMethod(PEM)8212;Thepileheadmotionismeasuredasafunctionoftime.Thetimedomainrecordisthenevaluatedforpileintegrity.4.1.1.2TransientResponseMethod(TRM)8212;Thepileheadmotionandforce(measuredwithaninstrumentedhammer)aremeasuredasafunctionoftime.Thedataareevaluatedusuallyinthefrequencydomain.1.1Thistestmethodcoverstheprocedurefordeterminingtheintegrityofindividualverticalorinclinedpilesbymeasuringandanalyzingthevelocity(required)andforce(optional)responseofthepileinducedbyan(handheldhammerorothersimilartype)impactdeviceusuallyappliedaxiallyandperpendicularlytothepileheadsurface.Thistestmethodisapplicabletolongstructuralelementsthatfunctioninamannersimilartoanydeepfoundationunits(suchasdrivenpiles,augeuredpiles,ordrilledshafts),regardlessoftheirmethodofinstallationprovidedthattheyarereceptivetolowstrainimpacttesting.1.2Thisstandardprovidesminimumrequirementsforlowstrainimpacttestingofpiles.Plans,specifications,and/orprovisionspreparedbyaqualifiedengineer,andapprovedbytheagencyrequiringthetest(s),mayprovideadditionalrequirementsandproceduresasneededtosatisfytheobjectivesofaparticulartestprogram.1.3Thetextofthisstandardreferencesnotesandfootnoteswhichprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthestandard.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.1.6Themethodusedtospecifyhowdataarecollected,calculated,orrecordedinthisstandardisnotdirectlyrelatedtotheaccuracytowhichthedatacanbeappliedindesignorotheruses,orboth.Howoneappliestheresultsobtainedusingthisstandardisbeyonditsscope.Thisstandardmayinvolvehazardousmaterials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note1hequalityoftheresultproducedbythistestmethodisdependentonthecompetenceofthepersonnelperformingit,andthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting/sampling/inspection/etc.UsersofthistestmethodarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliableresults.Reliableresultsdependonmanyfactors;PracticeD3740providesameansof......
【中国标准分类号】:P22
【国际标准分类号】:19_060
【页数】:6P.;A4
【正文语种】: