1、Designation:D463118Standard Test Method forDetermining Transmissivity and Storativity of LowPermeability Rocks by In Situ Measurements UsingPressure Pulse Technique1This standard is issued under the fixed designation D4631;the number immediately following the designation indicates the year oforigina
2、l 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 a field procedure for determin-ing the transmiss
3、ivity and storativity of geological formationshaving permeabilities lower than 103m2(1 millidarcy)usingthe pressure pulse technique.1.2 The transmissivity and storativity values determined bythis test method provide a good approximation of the capacityof the zone of interest to transmit water,if the
4、 test intervals arerepresentative of the entire zone and the surrounding rock isfully water saturated.1.3 UnitsThe values stated in SI units are to be regardedas the standard.The values in parentheses are mathematicalconversions provided for information only and are not consid-ered standard.Reportin
5、g of test results in units other than SIshall not be regarded as nonconformance with this standard.1.4 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026,unless superseded by this standard.1.4.1 For purposes of comparing
6、 a measured or calculatedvalue(s)with specified limits,the measured or calculatedvalue(s)shall be rounded to the nearest decimal or significantdigits in the specified limits.1.4.2 The procedures used to specify how data are collected/recorded or calculated in this standard are regarded as theindustr
7、y 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
8、 or reduce significant digits of reported data to becommensurate with these conditions.It is beyond the scope ofthis standard to consider significant digits used in analysismethods for engineering design.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with i
9、ts 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.1.6 This international standard was developed in accor-dance with internationally recognized princip
10、les 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
11、,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 ConstructionD5717 Guide for Design of Ground-Water Monitoring S
12、ys-tems in Karst and Fractured-Rock Aquifers(Withdrawn2005)3D6026 Practice for Using Significant Digits in GeotechnicalDataF2070 SpecificationforTransducers,PressureandDifferential,Pressure,Electrical and Fiber-Optic3.Terminology3.1 Definitions:3.1.1 For definitions of common technical terms in this
13、standard,refer to Terminology D653.3.2 Symbols:1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.21 on Groundwater andVadose Zone Investigations.Current edition approved July 15,2018.Published August 2018.Originallya
14、pproved in 1986.Last previous edition approved in 2008 as D4631 95(2008),which was withdrawn January 2017 and reinstated July 2018.DOI:10.1520/D4631-18.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandar
15、ds 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,We
16、st 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 3.2.1 Cbbulk rock compressibility M1LT2.3.2.2 Cwcompressibility of water M1LT2.3.2.3 Khydraulic conductivity LT1.3.2.3.1 DiscussionThe use of
