ASTM D5780-2010 承受静力轴向压力载荷的永冻层中的单桩的标准试验方法

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【英文标准名称】:StandardTestMethodforIndividualPilesinPermafrostUnderStaticAxialCompressiveLoad
【原文标准名称】:承受静力轴向压力载荷的永冻层中的单桩的标准试验方法
【标准号】:ASTMD5780-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:D18.19
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:axialload;compressiveload;displacementrate;frozen;permafrost;piles;soil;staticload;Time-to-failure(TTF);Verticalpiles;Axialloadingtests;Compressiontesting--soil;Creep--soil;Deepfoundationunits;Displacementrate;Foundati
【摘要】:Thistestmethodwillprovidearelationshipbetweentimetofailure,creeprate,anddisplacementtofailureforspecificfailureloadsatspecifictesttemperaturesaswellasarelationshipbetweencreeprateandappliedloadatspecifictesttemperaturesforloadslessthanfailureloads.Piledesignforspecificsoiltemperaturesmaybecontrolledbyeitherlimitinglong-termstresstobelowlong-termstrengthorbylimitingallowablesettlementoverthedesignlifeofthestructure.Itisthepurposeofthistestmethodtoprovidethebasicinformationfromwhichthelimitingstrengthorlong-termsettlementmaybeevaluatedbygeotechnicalengineers.Dataderivedfrompiletestsatspecificgroundtemperaturesthatdifferfromthedesigntemperaturesmustbecorrectedtothedesigntemperaturebytheuseofdatafromadditionalpiletests,laboratorysoilstrengthtests,orpublishedcorrelations,ifapplicable,toprovideasuitablemeansofcorrection.Fordrivenpilesorgroutedpiles,failurewilloccuratthepile/soilinterface.Forslurriedpiles,failurecanoccurateitherthepile/slurryinterfaceortheslurry/soilinterface,dependingonthestrengthanddeformationpropertiesoftheslurrymaterialandtheadfreezebondstrength.Locationofthefailuresurfacemustbetakenintoaccountinthedesignofthetestprogramandintheinterpretationofthetestresults.Dynamicloadsmustbeevaluatedseparately.Note38212;Thequalityoftheresultsproducedbyapplicationofthisstandardisdependentonthecompetenceofthepersonnelperformingit,andthesuitabilityoftheequipmentandfacilities.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting/sampling/inspection/etc.UsersofthisstandardarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliableresults.Reliableresultsdependonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Thesetestmethodscoverproceduresfortestingindividualverticalpilestodetermineresponseofthepiletostaticcompressiveloadappliedaxiallytothepile.Thesetestmethodsareapplicabletoalldeepfoundationunitsinpermafrostthatfunctioninamannersimilartopilesregardlessoftheirmethodofinstallation.Thisstandardisdividedintothefollowingsections:
【中国标准分类号】:P13
【国际标准分类号】:93_020
【页数】:15P.;A4
【正文语种】:英语