1、Designation:D577820Standard Test Method forElectronic Friction Cone and Piezocone Penetration Testingof Soils1This standard is issued under the fixed designation D5778;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last
2、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 procedure for determiningthe resistance of a friction cone or a piezocone as it is advancedinto sub
3、surface soils at a steady rate.1.2 This test method applies to electronic friction cones anddoes not include hydraulic,pneumatic,or free-fall cones,although many of the procedural requirements herein couldapply to those cones.Also,offshore/marine Cone PenetrationTesting(CPT)systems may have procedur
4、al differences be-cause of the difficulties of testing in those environments(forexample,tidal variations,salt water and waves).Field testsusing mechanical-type cones are covered elsewhere by TestMethod D3441.1.3 This test method can be used to determine pore waterpressures developed during the penet
5、ration when using aproperly saturated piezocone.Pore water pressure dissipation,after a push,can also be monitored for correlation to time rateof consolidation and permeability.1.4 Additional sensors,such as inclinometer,seismic(TestMethods D7400),resistivity,electrical conductivity,dielectric,and t
6、emperature sensors,may be included in the cone toprovide additional information.The use of an inclinometer isrecommended since it will provide information on potentiallydamaging situations during the sounding process.1.5 CPT data can be used to interpret subsurfacestratigraphy,and through use of sit
7、e specific correlations,theycan provide data on engineering properties of soils intended foruse in design and construction of earthworks and foundationsfor structures.1.6 UnitsThe values stated in SI units are to be regardedas standard.No other units of measurement are included in thisstandard.Repor
8、ting of test results in units other than SI shallnot be regarded as nonconformance with this test method1.7 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026,unless superseded by this test method.1.7.1 The procedures us
9、ed 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,speci
10、al 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 eng
11、ineering data.1.8 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 pri
12、or to use.1.9 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 TechnicalBa
13、rriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD3441 Test Method for Mechanical Cone Penetration Test-ing of SoilsD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Ro
14、ck asUsed in Engineering Design and ConstructionD6026 Practice for Using Significant Digits in GeotechnicalData1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.02 on Sampling andRelated Field Testing for Soil Evalua
15、tions.Current edition approved June 1,2020.Published July 2020.Originally approvedin 1995.Last previous edition approved in 2012 as D577812.DOI:10.1520/D5778-20.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of AS
16、TMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*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
