ASTM D1586-2008a 标准贯入试验(SPT)和土壤开管取样的标准试验方法

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【英文标准名称】:StandardTestMethodforStandardPenetrationTest(SPT)andSplit-BarrelSamplingofSoils
【原文标准名称】:标准贯入试验(SPT)和土壤开管取样的标准试验方法
【标准号】:ASTMD1586-2008a
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:D18.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:blowcount;in-situtest;penetrationresistance;soil;split-barrelsampling;standardpenetrationtest;Penetrationresistance;Soilsampling;Split-barrelmethod;SPT(standardpenetrationtest)
【摘要】:Thistestmethodprovidesadisturbedsoilsampleformoisturecontentdetermination,foridentificationandclassification(PracticesD2487andD2488)purposes,andforlaboratorytestsappropriateforsoilobtainedfromasamplerthatwillproducelargeshearstraindisturbanceinthesamplesuchasTestMethodsD854,D2216,andD6913.Soildepositscontaininggravels,cobbles,orboulderstypicallyresultinpenetrationrefusalanddamagetotheequipment.Thistestmethodprovidesadisturbedsoilsampleformoisturecontentdeterminationandlaboratoryidentification.Samplequalityisgenerallynotsuitableforadvancedlaboratorytestingforengineeringproperties.Theprocessofdrivingthesamplerwillcausedisturbanceofthesoilandchangetheengineeringproperties.Useofthethinwalltubesampler(PracticeD1587)mayresultinlessdisturbanceinsoftsoils.CoringtechniquesmayresultinlessdisturbancethanSPTsamplingforhardersoils,butitisnotalwaysthecase,thatis,somecementedsoilsmaybecomeloosenedbywateractionduringcoring;seePracticeD6151,andGuideD6169.Thistestmethodisusedextensivelyinagreatvarietyofgeotechnicalexplorationprojects.Manylocalcorrelationsandwidelypublishedcorrelationswhichrelateblowcount,orN-value,andtheengineeringbehaviorofearthworksandfoundationsareavailable.Forevaluatingtheliquefactionpotentialofsandsduringanearthquakeevent,theN-valueshouldbenormalizedtoastandardoverburdenstresslevel.PracticeD6066providesmethodstoobtainarecordofnormalizedresistanceofsandstothepenetrationofastandardsamplerdrivenbyastandardenergy.Thepenetrationresistanceisadjustedtodrillrodenergyratioof60%byusingahammersystemwitheitheranestimatedenergydeliveryordirectlymeasuringdrillrodstresswaveenergyusingTestMethodD4633.Note18212;Thereliabilityofdataandinterpretationsgeneratedbythispracticeisdependentonthecompetenceofthepersonnelperformingitandthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740generallyareconsideredcapableofcompetenttesting.UsersofthispracticearecautionedthatcompliancewithPracticeD3740doesnotassurereliabletesting.ReliabletestingdependsonseveralfactorsandPracticeD3740providesameansofevaluatingsomeofthesefactors.PracticeD3740wasdevelopedforagenciesengagedinthetesting,inspection,orboth,ofsoilsandrock.Assuch,itisnottotallyapplicabletoagenciesperformingthispractice.UsersofthistestmethodshouldrecognizethattheframeworkofPracticeD3740isappropriateforevaluatingthequalityofanagencyperformingthistestmethod.Currently,thereisnoknownqualifyingnationalauthoritythatinspectsagenciesthatperformthistestmethod.1.1Thistestmethoddescribestheprocedure,generallyknownastheStandardPenetrationTest(SPT),fordrivingasplit-barrelsamplertoobtainarepresentativedisturbedsoilsampleforidentificationpurposes,andmeasuretheresistanceofthesoiltopenetrationofthesampler.Anothermethod(TestMethodD3550)todriveasplit-barrelsamplertoobtainarepresentativesoilsampleisavailablebutthehammerenergyisnotstandardized.1.2PracticeD6066givesaguidetodeterminingthenormalizedpenetrationresistanceofsandsforenergyadjustmentsofN-value......
【中国标准分类号】:B10
【国际标准分类号】:93_020
【页数】:9P.;A4
【正文语种】:英语