ASTM_D_4553_-_18.pdf

Designation:D455318Standard Test Method forDetermining In Situ Creep Characteristics of Rock1This standard is issued under the fixed designation D4553;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 documentation for determining in situcreep characteristics of a rock mass using a rigid plate loadingmethod.1.2 This test method is designed to be conducted in an aditor small underground chamber;however,with suitablemodifications,this test could be conducted at the surface.1.3 The test is usually conducted parallel or perpendicular tothe anticipated axis of thrust,as dictated by the design load orother orientations,based upon the application.1.4 Flexible plate apparatus can be used if the anticipatedcreep displacement is within the tolerance of the travel of theflat jacks.1.5 UnitsThe values stated in inch-pound units are to beregarded as standard.The values given in parentheses aremathematical conversions to SI units that are provided forinformation only and are not considered standard.Reporting oftest results in units other than inch-pound shall not be regardedas nonconformance with this standard.1.5.1 The gravitational system of inch-pound units is usedwhen dealing with inch-pound units.In the system,the pound(lbf)represents a unit of force(weight),while the units formass is slugs.The slug unit is not given,unless dynamic(F=ma)calculations are involved.1.6 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026,unless superseded by this test method.1.6.1 For purposes of comparing a measured or calculatedvalue(s)with specified limits,the measured or calculatedvalue(s)shall be rounded to the nearest decimal of significantdigits in the specified limit.1.6.2 The procedures used to specify how data are collected/recorded and calculated in the standard are regarded as theindustry standard.In addition,they are representative of thesignificant digits that generally should be retained.The proce-dures used do not consider material variation,purpose forobtaining the data,special purpose studies,or any consider-ations for the users objectives;and it is common practice toincrease or reduce significant digits of reported data to becommensurate with these considerations.It is beyond the scopeof these test methods to consider significant digits used inanalysis methods for engineering data.1.7 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.For specific precaution statements,see Section 8.1.8 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 ContainedFluidsD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD4394 Test Method for Determining In Situ Modulus ofDeformation of Rock Mass Using Rigid Plate LoadingMethodD4403 Practice for Extensometers Used in RockD4879 Guide for Geotechnical Mapping of Large Under-ground Openings in Rock(Withdrawn 2017)3D6026 Practice for Using Significant Digits in GeotechnicalData3.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 1,2018.Published August 2018.Originallyapproved in 1985.Last previous edition approved in 2008 as D4553 08,whichwas withdrawn January 2017 and reinstated July 2018.DOI:10.1520/D4553-18.2For 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 theD