ASTM_D_4394_-_17.pdf

Designation:D439417Standard Test Method forDetermining In Situ Modulus of Deformation of Rock MassUsing Rigid Plate Loading Method1This standard is issued under the fixed designation D4394;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers the preparation,equipment,testprocedure,and data reduction for determining in situ modulusof deformation of a rock mass using the rigid plate loadingmethod.1.2 This test method is designed to be conducted in an aditor small underground chamber;however,with suitable modi-fications it could be conducted at the surface.1.3 This test method is usually conducted parallel or per-pendicular to the anticipated axis of thrust,as dictated by thedesign load and to diametrically opposite surfaces.1.4 Both instantaneous deformation and primary creep canbe obtained from this test method.1.5 Time dependent tests can be performed and are dis-cussed briefly here but are to be reported in another standard.1.6 Observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026.1.6.1 The method used to specify how data are collected,calculated,or recorded in this standard is not directly related tothe accuracy to which the data can be applied in design or otheruses,or both.How one applies the results obtained using thisstandard is beyond its scope.1.7 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.8 The references appended to this standard contain furtherinformation on this test method.1.9 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory requirements prior to use.For specificprecaution statements,see Section 8.1.10 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD2113 Practice for Rock Core Drilling and Sampling ofRock for Site ExplorationD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD4395 Test Method for Determining In Situ Modulus ofDeformation of Rock Mass Using Flexible Plate LoadingMethodD4403 Practice for Extensometers Used in RockD4879 Guide for Geotechnical Mapping of Large Under-ground Openings in Rock(Withdrawn 2017)3D5079 Practices for Preserving and Transporting Rock CoreSamples(Withdrawn 2017)3D5434 Guide for Field Logging of Subsurface Explorationsof Soil and RockD6026 Practice for Using Significant Digits in GeotechnicalDataD6032 Test Method for Determining Rock Quality Designa-tion(RQD)of Rock Core3.Terminology3.1 Definitions:1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.12 on Rock Mechanics.Current edition approved July 1,2017.Published August 2017.Originallyapproved in 1984.Last previous edition approved in 2008 as D4394 08.DOI:10.1520/D4394-17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 3.1.1 For terminology used in this test method,refer toTerminology,D653.3.2 Definitions of Terms Specific to This Standard:3.2.1 deflection,nmovement of the rigid plate,mortarpad,or rock in response to and in the same direction as theapplied load.3.2.2 peak-to-peak modulus of deformation,nthe slope ofthe stress-strain curve line connecting the peaks of the curvesobtained from successive pressure cycl