【英文标准名称】:StandardTestMethodforDensityofSoilinPlacebytheDrive-CylinderMethod
【原文标准名称】:传动缸法测定现场土壤密度的标准试验方法
【标准号】:ASTMD2937-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:D18.08
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:compactioncontrol;densitytesting;drivecylinder;drivecylindertest;fielddensity;in-placedensity;plugsampler;qualitycontrol;subsurfacesampler;surfacesampler;unitweight;Backfill--testing;Subsurfaceinvestigation--soil/rock;S
【摘要】:Thistestmethodcanbeusedtodeterminethein-placedensityofsoilswhichdonotcontainsignificantamountsofparticlescoarserthan4.75mm(3/16in.),andwhichcanbereadilyretainedinthedrivecylinder.Thistestmethodmayalsobeusedtodeterminethein-placedensityofcompactedsoilsusedinconstructionofstructuralfill,highwayembankments,orearthdams.Whenthein-placedensityistobeusedasabasisforacceptance,thedrivecylindervolumesmustbeaslargeaspracticalandnotlessthan850cm3(0.030ft3).Thistestmethodisnotrecommendedforuseinorganicorfriablesoils.Thistestmethodmaynotbeapplicableforsoft,highlyplastic,noncohesive,saturatedorothersoilswhichareeasilydeformed,compressduringsampling,orwhichmaynotberetainedinthedrivecylinder.Theuseofthistestmethodinsoilscontainingparticlescoarserthan4.75mm(3/16in.)mayresultindamagetothedrivecylinderequipment.Soilscontainingparticlescoarserthan4.75mm(3/16in.)maynotyieldvalidresultsifvoidsarecreatedalongthewallofcylinderduringdriving,orifparticlesaredislodgedfromthesampleendsduringtrimming.Thegeneralprinciplesofthistestmethodhavebeensuccessfullyusedtoobtainsamplesofsomefieldcompactedfine-grainedsoilshavingamaximumparticlesizeof4.75mm(3/16in.)forpurposesotherthandensitydeterminations,suchasthetestingforengineeringproperties.Note18212;Notwithstandingthestatementsonprecisionandbiascontainedinthisstandard:Theprecisionofthistestmethodisdependentonthecompetenceofthepersonnelperformingitandthesuitabilityoftheequipmentandfacilitiesused.AgencieswhichmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting.UsersofthismethodarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliabletesting.Reliabletestingdependsonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Thistestmethodcoversthedeterminationofin-placedensityofsoilbythedrive-cylindermethod.Thetestmethodinvolvesobtainingarelativelyintactsoilsamplebydrivingathin-walledcylinderandthesubsequentactivitiesforthedeterminationofin-placedensity.Whensamplingorin-placedensityisrequiredatdepth,TestMethodD1587shouldbeused.1.2Thistestmethodisnotappropriateforsamplingorganicsoilswhichcancompressuponsampling,veryhardnaturalsoilsandheavilycompactedsoilswhichcannotbeeasilypenetratedbythedrivesampler,soilsoflowplasticitywhichwillnotbereadilyretainedinthecylinder,orsoilswhichcontainappreciableamountsofgravel(particlescoarserthan4.75mm(3/16in.)).Thepresenceofparticlescoarserthan4.75mm(3/16in.)mayintroducesignificanterrorsindensitymeasurementsbycausingvoidsalongthewallofthecylinderduringdriving,andwhencoarsematerialshavetobedislodgedbythetrimmingofthesampleobtainedbythecylinder.1.3Thistestmethodislimitedtotheproceduresnecessaryforobtainingspecimenssuitablefordeterminingthein-placedensi......
【中国标准分类号】:P13
【国际标准分类号】:93_020
【页数】:8P.;A4
【正文语种】:英语


【英文标准名称】:Codeofpracticeforintruderalarmsystemssignallingtoalarmreceivingcentres
【原文标准名称】:警报接收中心信号防盗警报系统的实践规范
【标准号】:DD243-1998
【标准状态】:作废
【国别】:英国
【发布日期】:1998-01-15
【实施或试行日期】:
【发布单位】:英国标准学会(BSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:遥控系统;建筑物安全系统;防偷窃措施;防盗警报;性能;装配;犯罪预防装置;无线电通信;误差;信号装置;建筑物;警报系统;设计
【英文主题词】:
【摘要】:
【中国标准分类号】:A91
【国际标准分类号】:13_310
【页数】:18P;A4
【正文语种】:英语