Designation:D4394−17StandardTestMethodforDeterminingInSituModulusofDeformationofRockMassUsingRigidPlateLoadingMethod1ThisstandardisissuedunderthefixeddesignationD4394;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthepreparation,equipment,testprocedure,anddatareductionfordetermininginsitumodulusofdeformationofarockmassusingtherigidplateloadingmethod.1.2Thistestmethodisdesignedtobeconductedinanaditorsmallundergroundchamber;however,withsuitablemodi-ficationsitcouldbeconductedatthesurface.1.3Thistestmethodisusuallyconductedparallelorper-pendiculartotheanticipatedaxisofthrust,asdictatedbythedesignloadandtodiametricallyoppositesurfaces.1.4Bothinstantaneousdeformationandprimarycreepcanbeobtainedfromthistestmethod.1.5Timedependenttestscanbeperformedandaredis-cussedbrieflyherebutaretobereportedinanotherstandard.1.6ObservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.1.6.1Themethodusedtospecifyhowdataarecollected,calculated,orrecordedinthisstandardisnotdirectlyrelatedtotheaccuracytowhichthedatacanbeappliedindesignorotheruses,orboth.Howoneappliestheresultsobtainedusingthisstandardisbeyonditsscope.1.7Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.8Thereferencesappendedtothisstandardcontainfurtherinformationonthistestmethod.1.9Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatoryrequirementspriortouse.Forspecificprecautionstatements,seeSection8.1.10Thisinternationalstandardwasdeveloped...
