Designation:D4395−17StandardTestMethodforDeterminingInSituModulusofDeformationofRockMassUsingFlexiblePlateLoadingMethod1ThisstandardisissuedunderthefixeddesignationD4395;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthepreparation,equipment,testprocedure,anddatareductionfordetermininginsitumodulusofdeformationofarockmassusingtheflexibleplateloadingmethod.1.2Thistestmethodisdesignedtobeconductedinanaditorsmallundergroundchamber;however,withsuitablemodi-ficationsitcouldbeconductedatthesurface.1.3Thistestmethodisusuallyconductedparallelorper-pendiculartotheanticipatedaxisofthrust,asdictatedbythedesignloadandtodiametricallyoppositesurfaces.1.4Bothinstantaneousdeformationandprimarycreepcanbeobtainedfromthistestmethod.1.5Time-dependenttestsnotcoveredbythisstandardcanbeperformedbutaretobereportedinanotherstandard.1.6AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.1.6.1Themethodusedtospecifyhowdataarecollected,calculated,orrecordedinthisstandardisnotdirectlyrelatedtotheaccuracytowhichthedatacanbeappliedindesignorotheruses,orboth.Howoneappliestheresultsobtainedusingthisstandardisbeyonditsscope.1.7Thevaluesstatedininch-poundunitsaretoberegardedasstandard,exceptasnotedbelow.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.ReportingoftestresultsinunitsotherthanSIshallnotberegardedasnonconformancewiththistestmethod.1.8Thereferencesappendedtothisstandardcontainfurtherinformationonthistestmethod.1.9Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityo...
