作者:标准资料网 时间:2024-05-24 05:01:23   浏览:8210   来源:标准资料网

【英文标准名称】:StandardPracticeforDescriptionandIdentificationofSoils(Visual-ManualProcedure)
【原文标准名称】:土壤描述和鉴别的标准实施规程(目测-手工操作程序)
【标准号】:ASTMD2488-2009a
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:D18.07
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:classification;clay;gravel;organicsoils;sand;silt;soilclassification;soildescription;visualclassification;Clay;Description/descriptiveanalysis;Gravel;Identification;Organicsoils;Sand;Silt;Soil;Soilclassification;Visualexamination
【摘要】:Thedescriptiveinformationrequiredinthispracticecanbeusedtodescribeasoiltoaidintheevaluationofitssignificantpropertiesforengineeringuse.ThedescriptiveinformationrequiredinthispracticeshouldbeusedtosupplementtheclassificationofasoilasdeterminedbyTestMethodD2487.ThispracticemaybeusedinidentifyingsoilsusingtheclassificationgroupsymbolsandnamesasprescribedinTestMethodD2487.SincethenamesandsymbolsusedinthispracticetoidentifythesoilsarethesameasthoseusedinTestMethodD2487,itshallbeclearlystatedinreportsandallotherappropriatedocuments,thattheclassificationsymbolandnamearebasedonvisual-manualprocedures.Thispracticeistobeusednotonlyforidentificationofsoilsinthefield,butalsointheoffice,laboratory,orwhereversoilsamplesareinspectedanddescribed.Thispracticehasparticularvalueingroupingsimilarsoilsamplessothatonlyaminimumnumberoflaboratorytestsneedberunforpositivesoilclassification.Note48212;Theabilitytodescribeandidentifysoilscorrectlyislearnedmorereadilyundertheguidanceofexperiencedpersonnel,butitmayalsobeacquiredsystematicallybycomparingnumericallaboratorytestresultsfortypicalsoilsofeachtypewiththeirvisualandmanualcharacteristics.Whendescribingandidentifyingsoilsamplesfromagivenboring,testpit,orgroupofboringsorpits,itisnotnecessarytofollowalloftheproceduresinthispracticeforeverysample.Soilswhichappeartobesimilarcanbegroupedtogether;onesamplecompletelydescribedandidentifiedwiththeothersreferredtoassimilarbasedonperformingonlyafewofthedescriptiveandidentificationproceduresdescribedinthispractice.ThispracticemaybeusedincombinationwithPracticeD4083whenworkingwithfrozensoils.Note58212;Notwithstandingthestatementsonprecisionandbiascontainedinthisstandard:Theprecisionofthistestmethodisdependentonthecompetenceofthepersonnelperformingitandthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting.UsersofthistestmethodarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliabletesting.Reliabletestingdependsonseveralfactors;PracticeD3740providesameansforevaluatingsomeofthosefactors.1.1Thispracticecoversproceduresforthedescriptionofsoilsforengineeringpurposes.1.2Thispracticealsodescribesaprocedureforidentifyingsoils,attheoptionoftheuser,basedontheclassificationsystemdescribedinTestMethodD2487.Theidentificationisbasedonvisualexaminationandmanualtests.Itmustbeclearlystatedinreportinganidentificationthatitisbasedonvisual-manualprocedures.1.2.1Whenpreciseclassificationofsoilsforengineeringpurposesisrequired,theproceduresprescribedinTestMethodD2487shallbeused.1.2.2Inthispractice,theidentificationportionassigningagroupsymbolandnameislimitedtosoilparticlessmallerthan3in.(75mm).1.2.3Theidentificationportionofthispracticeislimitedtonaturallyoccurringsoils(eitherintactordisturbed).Note18212;Thispracticemaybeusedasadescriptivesystemappliedtosuchmaterialsasshale,claystone,shells,crushedrock,etc.(see......
【中国标准分类号】:P13
【国际标准分类号】:93_020
【页数】:11P.;A4
【正文语种】:英语