【英文标准名称】:StandardTestMethodforOne-DimensionalConsolidationPropertiesofSaturatedCohesiveSoilsUsingControlled-StrainLoading
【原文标准名称】:用可控应变荷载测试饱和粘性土单维固结性能的标准试验方法
【标准号】:ASTMD4186-2006
【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】:D18.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:固结试验(土壤);固结性;建筑;施工材料;特性;土壤;试验
【英文主题词】:compressibility;compressibilitycoefficient;CRS;consolidationcoefficient;consolidationtest;consolidometer;hydraulicconductivity;preconsolidationstress;settlement
【摘要】:1.1Thistestmethodisforthedeterminationofthemagnitudeandrate-of-consolidationofsaturatedcohesivesoilsusingcontinuouscontrolled-strainaxialcompression.Thespecimenisrestrainedlaterallyanddrainedaxiallytoonesurface.Theaxialforceandbaseexcesspressurearemeasuredduringthedeformationprocess.Controlledstraincompressionistypicallyreferredtoasconstantrate-of-strain(CRS)testing.1.2Thistestmethodprovidesforthecalculationoftotalandeffectiveaxialstresses,andaxialstrainfromthemeasurementofaxialforce,axialdeformation,andbaseexcesspressure.Theeffectivestressiscomputedusingsteadystateequations.1.3Thistestmethodprovidesforthecalculationofthecoefficientofconsolidationandthehydraulicconductivitythroughouttheloadingprocess.Thesevaluesarealsobasedonsteadystateequations.1.4Thistestmethodmakesuseofsteadystateequationsresultingfromatheoryformulatedunderparticularassumptions.Sectionpresentstheseassumptions.1.5ThebehaviorofcohesivesoilsisstrainratedependentandhencetheresultsofaCRStestaresensitivetotheimposedrateofstrain.Thistestmethodimposeslimitsonthestrainratetoprovidecomparableresultstotheincrementalconsolidationtest.1.6ThedeterminationoftherateandmagnitudeofconsolidationofsoilwhenitissubjectedtoincrementalloadingiscoveredbyTestMethodD2435.1.7Thistestmethodappliestointact(GroupCandGroupDofPracticeD4220),remolded,orlaboratoryreconstitutedsamplesorspecimens.1.8Thistestmethodismostoftenusedformaterialsofrelativelylowhydraulicconductivitythatgeneratemeasurableexcessbasepressures.Itmaybeusedtomeasurethecompressionbehaviorofessentiallyfreedrainingsoilsbutwillnotprovideameasureofthehydraulicconductivityorcoefficientofconsolidation.1.9AllrecordedandcalculatedvaluesshallconformtotheguideforsignificantdigitsandroundingestablishedinPracticeD6026.1.9.1Theproceduresusedtospecifyhowdataarecollected/recordedandcalculatedinthisstandardareregardedastheindustrystandard.Inaddition,theyarerepresentativeofthesignificantdigitsthatshouldgenerallyberetained.Theproceduresuseddonotconsidermaterialvariation,purposeforobtainingthedata,specialpurposestudies,oranyconsiderationsfortheusersobjectives;anditiscommonpracticetoincreaseorreducesignificantdigitsofreporteddatatobecommensuratewiththeseconsiderations.Itisbeyondthescopeofthisstandardtoconsidersignificantdigitsusedinanalysismethodsforengineeringdesign.1.9.2Measurementsmadetomoresignificantdigitsorbettersensitivitythanspecifiedinthisstandardshallnotberegardedanon-conformancewiththisstandard.1.10ThisstandardiswrittenusingSIunits.Inch-poundunitsareprovidedforconvenience.Thevaluesstatedininch-poundunitsmaynotbeexactequivalents;therefore,theyshallbeusedindependentlyoftheSIsystem.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththethisstandard.1.10.1Thegravitationalsystemofinch-poundunitsisusedwhendealingwithinch-poundunits.Inthissystem,thepound(lbf)representsaunitofforce(weight),whiletheunitformassisslugs.Therationalizedslugunitisnotgiven,unlessdynamic(F=ma)calculationsareinvolved.1.10.2Itiscommonpracticeintheengineering/constructionprofessiontoconcurrentlyusepoundstorepresentbothaunitofmass(lbm)andofforce(lbf).Thisimplicitlycombinestwoseparatesystemsofunits;thatis,theabsolutesystemandthegravitationalsystem.Itisscientificallyundesirabletocombinetheuseoftwoseparatesetsofinch-poundunitswithinasinglestandard.Asstated,thisstandardincludesthegravitat......
【中国标准分类号】:P20
【国际标准分类号】:93_020
【页数】:15P.;A4
【正文语种】: