ASTM_D_4633_-_16.pdf

Designation:D463316Standard Test Method forEnergy Measurement for Dynamic Penetrometers1This standard is issued under the fixed designation D4633;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 describes procedures for measuring theenergy that enters the penetrometer drill rod string duringdynamic penetrometer testing of soil due to the hammerimpact.1.2 This test has particular application to the comparativeevaluation of N-values obtained from the Standard PenetrationTests(SPT)of soils in an open hole as in Test Method D1586and Practice D6066.This procedure may also be applicable toother dynamic penetrometer tests.1.3 The values stated in SI units are to be regarded asstandard.The inch-pound units given in parentheses aremathematical conversions which are provided for informationpurposes only and are not considered standard.Reporting oftest results in units other than SI shall not be regarded asnonconformance with this test method.1.3.1 The converted inch-pound units use the gravitationalsystem of units.In this system,the pound(lbf)represents a unitof force(weight),while the unit for mass is slugs.Theconverted slug unit is not given,unless dynamic(F=ma)calculations are involved.1.4 LimitationsThis test method applies to penetrometersdriven from above the ground surface.It is not intended for usewith down-hole hammers.1.5 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026.1.5.1 The procedures used to specify how data are collected/recorded or calculated,in this 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 this standard to consider significant digits used in analyticalmethods for engineering design.1.6 The text of this standard references notes and footnoteswhich provide explanatory material.These notes and footnotes(excluding those in tables and figures)shall not be consideredas requirements of the standard.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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD1586 Test Method for Penetration Test(SPT)and Split-Barrel Sampling of SoilsD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD6026 Practice for Using Significant Digits in GeotechnicalDataD6066 Practice for Determining the Normalized PenetrationResistance of Sands for Evaluation of Liquefaction Poten-tial3.Terminology3.1 Definitions:3.1.1 For definitions of common technical terms used in thisstandard,refer to Terminology D653.3.2 Definitions of Terms Specific to This Standard:3.2.1 anvil,nthe mass at the top of the drill rods that isstruck by the hammer.3.2.2 drill rods,nthe steel rods connecting the hammersystem above the ground surface to the sampler below thesurface.1This 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 Evaluations.Current edition approved July 1,2016.Published July 2016.Originally approvedin 2005.Last previous edition approved in 2010 as D4633 10.DOI:10.1520/D4633-16.2For 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.*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 States1 3.2.3 hammer,nan impact mass that is raised and droppedto create an impact on the drill rods.3.2.4 impedance(of the drill rod),na property of the drillrod equal to the drill rod elastic modulus times the crosssectional area divided by the velocity of wave propagation.3.2.5 instrumented subassembly,na short section of drillrod instrumented to measure force and acceleration which isinserted at the top of the drill rod and below the anvil.3.2.6 penetrometer,nany sampler,cone,bl