ASTM D6391-2006 使用从钻孔渗流的两个阶段对多孔材料液压传导性限值进行现场测量的标准试验方法

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【英文标准名称】:StandardTestMethodforFieldMeasurementofHydraulicConductivityLimitsofPorousMaterialsUsingTwoStagesofInfiltrationfromaBorehole
【原文标准名称】:使用从钻孔渗流的两个阶段对多孔材料液压传导性限值进行现场测量的标准试验方法
【标准号】:ASTMD6391-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:D18.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:活性;电导性;水平的;液压装置;渗透;测量;多孔材料;阶段;试验方法;垂直
【英文主题词】:horizontalhydraulicconductivity;in-placehydraulicactivity;verticalhydraulicconductivity
【摘要】:1.1Thistestmethodcoversfieldmeasurementoflimitingvaluesforverticalandhorizontalhydraulicconductivities(alsoreferredtoascoefficientsofpermeability)ofporousmaterialsusingthetwo-stage,casedboreholetechnique.Theselimitinghydraulicconductivityvaluesarethemaximumpossiblefortheverticaldirectionandminimumpossibleforthehorizontaldirection.Determinationofactualhydraulicconductivityvaluesrequiresfurtheranalysisbyqualifiedpersonnel.1.2Thistestmethodmaybeutilizedforcompactedfillsornaturaldeposits,aboveorbelowthewatertable,thathaveameanhydraulicconductivitylessthanorequalto110-5m/s(110-3cm/s).1.3Hydraulicconductivitygreaterthan110-5m/smaybedeterminedbyordinaryboreholetests,forexample,U.S.BureauofReclamation7310();however,theresultingvalueisanapparentconductivity.1.4Forthistestmethod,adistinctionmustbemadebetween"saturated"(Ks)and"field-saturated"(Kfs)hydraulicconductivity.Truesaturatedconditionsseldomoccurinthevadosezoneexceptwhereimpermeablelayersresultinthepresenceofperchedwatertables.Duringinfiltrationeventsorintheeventofaleakfromalinedpond,a"field-saturated"conditiondevelops.Truesaturationdoesnotoccurduetoentrappedair().Theentrappedairpreventswaterfrommovinginair-filledporesthat,inturn,mayreducethehydraulicconductivitymeasuredinthefieldbyasmuchasafactoroftwocomparedwithconditionswhentrappedairisnotpresent().Thistestmethodsimulatesthe"field-saturated"condition.1.5Experiencewiththistestmethodhasbeenpredominantlyinmaterialshavingadegreeofsaturationof70%ormore,andwherethestratificationorplaneofcompactionisrelativelyhorizontal.Itsuseinothersituationsshouldbeconsideredexperimental.1.6Asinthecaseofalltestsforhydraulicconductivity,theresultsofthistestpertainonlytothevolumeofsoilpermeated.Extendingtheresultstothesurroundingarearequiresbothmultipletestsandthejudgmentofqualifiedpersonnel.Thenumberoftestsrequireddependsonamongotherthings:thesizeofthearea,theuniformityofthematerialinthatarea,andthevariationindatafrommultipletests.1.7ThevaluesstatedinSIunitsaretoberegardedasthestandardunlessotherunitsspecificallyaregiven.BytraditioninU.S.practice,hydraulicconductivityisreportedincm/salthoughthecommonSIunitsforhydraulicconductivityarem/s.1.8AllobservedandcalculatedvaluesshallconformtotheguideforsignificantdigitsandroundingestablishedinPracticeD6026.1.8.1Theproceduresinthisstandardthatareusedtospecifyhowdataarecollected,recorded,andcalculatedareregardedastheindustrystandard.Inaddition,theyarerepresentativeofthesignificantdigitsthatshouldgenerallyberetained.Theproceduresdonotconsidermaterialvariation,purposeforobtainingthedata,specialpurposestudies,oranyconsiderationsfortheobjectivesoftheuser.Increasingorreducingthesignificantdigitsofreporteddatatobecommensuratewiththeseconsiderationsiscommonpractice.Considerationofthesignificantdigitstobeusedinanalysismethodsforengineeringdesignisbeyondthescopeofthisstandard.1.9Thisstandarddoesnotpurporttoaddressthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Thistestmethoddoesnotpurporttoaddressenvironmentalprotectionproblems,aswell.
【中国标准分类号】:Q17
【国际标准分类号】:07_060;73_100_30
【页数】:12P.;A4
【正文语种】: