【英文标准名称】:StandardTestMethodforInSituDeterminationofDirectShearStrengthofRockDiscontinuities
【原文标准名称】:岩石间断性直接剪切强度的现场的标准试验方法
【标准号】:ASTMD4554-2002(2006)
【标准状态】:现行
【国别】:
【发布日期】:2002
【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】:D18.12
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:砌块;建筑;施工材料;测定;天然石料;岩石;剪切强度;石;试验
【英文主题词】:discontinuities;insitustress;loadingtests;shearstrength
【摘要】:Becauseofscaleeffects,thereisnosimplemethodofpredictingtheinsitushearstrengthofarockdiscontinuityfromtheresultsoflaboratorytestsonsmallspecimens;insitutestsonlargespecimensarethemostreliablemeans.Resultscanbeemployedinstabilityanalysisofrockengineeringproblems,forexample,instudiesofslopes,undergroundopenings,anddamfoundations.Inapplyingthetestresults,theporewaterpressureconditionsandthepossibilityofprogressivefailuremustbeassessedforthedesigncase,astheymaydifferfromthetestconditions.Testsonintactrock(freefromplanesofweakness)areusuallyaccomplishedusinglaboratorytriaxialtesting.Intactrockcan,however,betestedinsituindirectsheariftherockisweakandifthespecimenblockencapsulationissufficientlystrong.Note18212;Thequalityoftheresultproducedbythisstandardisdependentonthecompetenceofthepersonnelperformingit,andthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting/sampling/inspection/etc.UsersofthisstandardarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliableresults.Reliableresultsdependonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Thistestmethodcoversthemeasurementofpeakandresidualdirectshearstrengthofinsiturockdiscontinuitiesasafunctionofstressnormaltotheshearedplane.Thisshearedplaneisusuallyasignificantdiscontinuitywhichmayormaynotbefilledwithgougeorsoil-likematerial.1.2Themeasuredshearpropertiesareaffectedbyscalefactors.Theseverityoftheeffectofthesefactorsmustbeassessedandappliedtothespecificproblemsonanindividualbasis.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P13
【国际标准分类号】:93_020
【页数】:7P.;A4
【正文语种】: