ASTM D4716-2008 使用恒定压头测定土工合成织物(在平面中)单位宽度流速和液压透射率的试验方法

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【英文标准名称】:StandardTestMethodforDeterminingthe(In-plane)FlowRateperUnitWidthandHydraulicTransmissivityofaGeosyntheticUsingaConstantHead
【原文标准名称】:使用恒定压头测定土工合成织物(在平面中)单位宽度流速和液压透射率的试验方法
【标准号】:ASTMD4716-2008
【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】:D35.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:geosynthetics;hydraulictransmissivity;in-planeflow;indextest;performancetest;Gradientratio;Hydraulicconductivity/transmissivity;In-planeflow;Stress--geosynthetics;Surfaceanalysis--soil/rock/relatedmaterials;Transmissivityandrefle
【摘要】:Thistestmethodisintendedeitherasanindextestorasaperformancetestusedtodetermineandcomparetheflowrateperunitwidthofoneorseveralcandidategeosyntheticsunderspecificconditions.Thistestmethodmaybeusedasanindextestforacceptancetestingofcommercialshipmentsofgeosyntheticsbutcautionisadvisedsinceinformationonbetween-laboratoryprecisionofthistestmethodisincomplete.Comparativetestsasdirectedin5.2.1maybeadvisable.Incaseofadisputearisingfromdifferencesinreportedtestresultswhenusingthistestmethodforacceptancetestingofcommercialshipments,thepurchaserandthesuppliershouldfirstconfirmthatthetestswereconductedusingcomparabletestparametersincludingspecimenconditioning,normalstress,seatingperiod,hydraulicgradient,testwatertemperature,etc.,thenconductcomparativeteststodetermineifthereisastatisticalbiasbetweentheirlaboratories.Competentstatisticalassistanceisrecommendedfortheinvestigationofbias.Asaminimum,thetwopartiesshouldtakeagroupoftestspecimensthatareashomogenousaspossibleandthatareformedfromalotofthematerialofthetypeinquestion.Thetestspecimensshouldthenberandomlyassignedinequalnumberstoeachlaboratoryfortesting.TheaverageresultsfromthetwolaboratoriesshouldbecomparedusingtheStudent''st-testforunpaireddataandanacceptableprobabilitylevelchosenbythetwopartiesbeforethetestingisbegun.Ifbiasisfound,eitheritscausemustbefoundandcorrectedorthepurchaserandsuppliermustagreetointerpretfuturetestresultsinlightoftheknownbias.1.1Thistestmethodcoverstheprocedurefordeterminingtheflowrateperunitwidthwithinthemanufacturedplaneofgeosyntheticsundervaryingnormalcompressivestressesandaconstanthead.Thetestisintendedprimarilyasanindextestbutcanbeusedalsoasaperformancetestwhenthehydraulicgradientsandspecimencontactsurfacesareselectedbytheusertomodelanticipatedfieldconditions.1.2Thistestmethodislimitedtogeosyntheticsthatallowcontinuousin-planeflowpathstooccurparalleltotheintendeddirectionofflow.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesstatedinparenthesesareprovidedforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W59
【国际标准分类号】:59_080_70
【页数】:10P.;A4
【正文语种】:英语