Designation:D4506−13´1StandardTestMethodforDeterminingInSituModulusofDeformationofRockMassUsingRadialJackingTest1ThisstandardisissuedunderthefixeddesignationD4506;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—EditorialcorrectionsweremadethroughoutinFebruary2014.1.Scope*1.1Thistestmethodisusedtodeterminetheinsitumodulusofdeformationofrockmassbysubjectingatestchamberofcircularcrosssectiontouniformlydistributedradialloading;theconsequentrockdisplacementsaremeasured,fromwhichelasticordeformationmodulimaybecalculated.Theanisotropicdeformabilityoftherockcanalsobemeasuredandinformationontime-dependentdeformationmaybeobtained.1.2Thistestmethodisbasedupontheproceduresdevel-opedbytheU.S.BureauofReclamationfeaturinglongextensometers(1).2Analternativeprocedureisalsoavailableandisbasedonareferencebar(2).MoreinformationonradialjackinganditsanalysisispresentedinReferences(3-8).1.3Applicationofthetestresultsisbeyondthescopeofthistestmethod,butmaybeanintegralpartofsometestingprograms.1.4Units—Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.Reportingoftestresultsinunitsotherthaninch-poundshallnotberegardedasnonconformancewiththistestmethod.1.4.1Thegravitationalsystemofinch-poundunitsisusedwhendealingwithinch-poundunits.Inthissystem,thepound(lbf)representsaunitofforce(weight),whiletheunitformassisslugs.1.5AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.1.5.1Theproceduresusedtospecifyhowdataarecollected/recordedorcalculated,inthisstandardareregardedastheindustrystandard.Inaddition,theyarerepresentativeofthesignificantdigitsthatgenerallyshouldberetained.Theproce-duresu...
