【英文标准名称】:StandardPracticeforDeterminingtheNormalizedPenetrationResistanceofSandsforEvaluationofLiquefactionPotential
【原文标准名称】:液化潜能的评价用砂的常规耐穿透性测定的标准操作规程
【标准号】:ASTMD6066-1996(2004)
【标准状态】:现行
【国别】:
【发布日期】:1996
【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】:(Practice)
【标准水平】:()
【中文主题词】:地震;抗穿透率;液化;标准穿透试验
【英文主题词】:earthquakes;liquefaction;penetrationresistance;standardpenetrationtest
【摘要】:1.1Thispracticeoutlinesaproceduretoobtainarecordofnormalizedresistanceofsandstothepenetrationofastandardsamplerdrivenbyastandardenergyforestimatingsoilliquefactionpotentialduringearthquakes.Thenormalizedpenetrationresistancedeterminedinthispracticemaybeusefulfordeterminationofotherengineeringpropertiesofsands.1.2ThispracticeusesTestMethodD1586withadditionsandmodificationstominimizedisturbanceofsaturatedloosecohesionlesssandsduringdrilling.ThispracticecombinesresultsofTestMethodD1586andinterpretsthedatafornormalizationpurposes.1.3DuetoinherentvariabilityoftheSPT,guidanceisgivenontestconfigurationandenergyadjustments.Penetrationresistanceisadjustedforenergydeliveredinthepenetrationtest.Energyadjustmentscanbeestimatedormeasuredandreported.1.4Standardpracticefornormalizingpenetrationresistancevaluesisgiven.Penetrationresistancedataarenormalizedtoastandardoverburdenstresslevel.1.5Thenormalizedpenetrationresistancedatamaybeusedtoestimateliquefactionresistanceofsaturatedsandsfromearthquakeshaking.Evaluationofliquefactionresistancemaybeappliedtonaturalgroundconditionsorfoundationsforeitherplannedorexistingstructures.1.6Usingthispracticerepresentativedisturbedsamplesofthesoilcanbecollectedforidentificationpurposes.1.7Thispracticeislimitedtouseincohesionlesssoils(seeTestMethodD2487andclassificationsofSM,SW,SP,SP-SM,andSW-SMPracticeD2488).Inmostcases,testingisperformedinsaturateddepositsbelowthewatertable.Insomecases,drysandsmaybetested(see).Thispracticeisnotapplicabletolithifiedmaterialsorfinegrainedsoils.Gravelcaninterferewiththetestandresultinelevatedpenetrationresistancevalues.Normalizationofpenetrationresistancevaluesforgravellysoilsisbeyondthescopeofthispractice.Penetrationresistancemeasurementsoftenwillinvolvesafetyplanning,administration,anddocumentation.Thispracticedoesnotpurporttoaddressallaspectsofexplorationandsitesafety.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Performanceofthetestusuallyinvolvesuseofadrillrig;therefore,safetyrequirementsasoutlinedinapplicablesafetystandards.Forexample,OSHAregulations,DCDMAsafetymanual,drillingsafetymanuals,andotherapplicablestateandlocalregulationsmustbeobserved.1.8Thevaluesstatedininch-poundunitsaretoberegardedasstandard.Withinthetext,theSIunits,areshowninparentheses.Thevaluesstatedineachsystemarenotequivalents,therefore,eachsystemmustbeusedindependentlyoftheother.1.8.1Inpressurecorrectioncalculations,commonunitsareton/ft2,kg/cm2,atm,andbars.Sincetheseunitsareapproximatelyequal(withinafactorof1.1),manyengineersprefertheuseoftheseunitsinstresscorrectioncalculations.ForthoseusingkPaorkN/m2,100kPaisapproximatelyequaltooneton/ft2.Thestressexponent,n,(see)isapproximatelyequalfortheseunits.1.9Thispracticemaynotbeapplicableinsomecountries,states,orlocalities,whererulesorstandardsmaydifferforapplyingpenetrationresistancetoliquefactionestimates.Otherpracticesexistforestimatingsoilinstabilityfrompenetrationresistancedata.Proceduresmaychangewithadvancesingeotechnicalengineering.Itisdependentontheuserinconsultationwithexperiencedengineerstoselectappropriatemethodsandcorrectiontodata.Inearthquakeeng......
【中国标准分类号】:A42
【国际标准分类号】:13_080_99
【页数】:16P.;A4
【正文语种】: