【英文标准名称】:StandardPracticesforHandling,Storing,andPreparingSoftIntactMarineSoil
【原文标准名称】:硬度低未经扰动海积土的搬运、储藏和制备的标准实施规程
【标准号】:ASTMD3213-2008
【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】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:laboratoryfine-grainedsoils;marine;soft;storage;intactsamples;Handlingmaterial--soil/relatedmaterials;Laboratorysoil/rockanalysis;Marinesoils;Preservation;Softmarinesoil;Storage--soil/rock/relatedmaterials;Undisturbedsoil
【摘要】:Disturbanceimpartedtosedimentsaftersamplingcansignificantlyaffectsomegeotechnicalproperties.Carefulpracticesneedtobefollowedtominimizesoilfabricchangescausedfromhandling,storing,andpreparingsedimentspecimensfortesting.Note18212;Thequalityoftheresultproducedbythisstandardisdependentonthecompetenceofthepersonnelperformingit,andthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting/sampling/inspection,etc.UsersofthisstandardarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliableresults.Reliableresultsdependonmayfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.Thepracticespresentedinthisdocumentshouldbeusedwithsoilthathasaverysoftorsoftshearstrength(undrainedshearstrengthlessthan25kPa(3.6psi))consistency.Note28212;Somesoilsthatareobtainedatorjustbelowtheseafloorquicklydeformundertheirownweightifleftunsupported.Thistypeofbehaviorpresentsspecialproblemsforsometypesoftesting.Specialhandlingandpreparationproceduresarerequiredunderthosecircumstances.Testaresometimesperformedatseatominimizetheeffectofstoragetimeandhandlingonsoilproperties.Anundrainedshearstrengthoflessthan25kPawasselectedbasedonTerzaghiandPeck.Theydefinedaverysoftsaturatedclayashavingundrainedshearstrengthlessthan25kPa.Thesepracticesshallapplytospecimensofnaturallyformedmarinesoil(thatmayormaynotbefragileorhighlysensitive)thatwillbeusedfordensitydetermination,consolidation,permeabilitytestingorshearstrengthtestingwithorwithoutstress-strainpropertiesandvolumechangemeasurements(seeNote3).Inaddition,dynamicandcyclictestingcanalsobeperformedonthesample.Note38212;Tohelpevaluatedisturbance,X-RayRadiographyhasprovenhelpful,refertoMethodsD4452.Thesepracticesapplytofine-grainedsoilsthatdonotallowtherapiddrainageofporewater.Althoughmanyoftheprocedurescanapplytocoarser-grainedsoils,drainagemayoccurrapidlyenoughtowarrantspecialhandlingproceduresnotcoveredinthesepractices.Thesepracticesapplyprimarilytosoilspecimensthatareobtainedinthin-walledorsimilarcoringdevicesthatproducehigh-qualitycoresorthatareobtainedbypushingathin-walledtubeintocorestakenwithanothersamplingdevice.Thesepracticescanbeusedinconjunctionwithsoilscontaininggas,however,morespecializedproceduresandequipmentthatarenotcoveredinthesepracticeshavebeendevelopedforusewithsuchmaterials.Note48212;Forinformationonhandlinggaschargedsediments,thereaderisreferredtopapersbyJohns,etal.,andLee.1.1Thesepracticescovermethodsforproject/cruisereporting,andhandling,transportingandstoringsoftcohesiveintactmarinesoil.Proceduresforpreparingsoilspecimensfortriaxialstrength,andconsolidationtestingarealsopresented.1.2Thesepracticesmayincludethehandlingandtransportingofsedimentspecimenscontaminatedwithhazardousmaterialsandsamplessubjecttoquarantineregulations.1.3Thesepracticesofferasetofinstructionsforperformingoneormorespecificoperations.Thisdocumentcannotreplaceeducationorexperienceandshouldbeusedinconjunctionwithprofessionaljudgment.Notallaspectsofthispracticemaybeapplicableinallcircumstance......
【中国标准分类号】:P13
【国际标准分类号】:07_060
【页数】:5P.;A4
【正文语种】:英语