Designation:D4971−16StandardTestMethodforDeterminingInSituModulusofDeformationofRockUsingDiametricallyLoaded76-mm(3-in.)BoreholeJack1ThisstandardisissuedunderthefixeddesignationD4971;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoverstheestimationofinsitumodulusofarockmassatvariousdepthsandorientations.Informationontime-dependentdeformationmayalsobeob-tained.1.2ThistestmethodcoverstestinginanNsizedrillholeandismorerelevanttoaboreholejackdevicedesignedfor“hardrock”thanforsoftrock.1.3AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.1.3.1Themethodusedtospecifyhowdataarecollected,calculated,orrecordedinthisstandardisnotdirectlyrelatedtotheaccuracytowhichthedatacanbeappliedindesignorotheruses,orboth.Howoneappliestheresultsobtainedusingthisstandardisbeyonditsscope.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesaremathematicalconversionstoinch-poundunitsthatareprovidedforinforma-tiononlyandarenotconsideredstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D653TerminologyRelatingtoSoil,Rock,andContainedFluidsD3740PracticeforMinimumRequirementsforAgenciesEngagedinTestingand/orInspectionofSoilandRockasUsedinEngineeringDesignandConstructionD6026PracticeforUsingSignificantDigitsinGeotechnicalDataD6032TestMethodforDeterminingRockQualityDesigna-tion(RQD)ofRockCore3.Terminology3.1Definitions:3.1.1Fordefinitionsofcommontechnicaltermsinthisstandard,refertoTerminologyD653.3.2DefinitionsofTermsSpecifictoThisStan...
