1、Designation:D463310Standard 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 p
2、arentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method describes procedures for measuring theenergy that enters the penetrometer drill rod string duringdynamic penetrometer testing of soil
3、 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 T
4、he 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.1.4 LimitationsThis test method applies to penetrometersdriven from above the ground surfac
5、e.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 D6026.1.6 The method used to specify how data are collected,calculated,or recorded in this standard is not directly rela
6、ted tohow the data can be applied in design or other uses,since thatis beyond its scope.Practice D6066 specifies how these datamay be normalized.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
7、 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:2D1586 Test Method for Penetration Test(SPT)and Split-Barrel Sampling of SoilsD3740 Practice for Minimum Requirements for AgenciesEn
8、gaged 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 Defin
9、itions of Terms Specific to This Standard:3.1.1 accelerationtransducer,oraccelerometerinstrument attached on,around,or within a continuous columnof drill rods to measure the time-varying acceleration generatedin the drill rods by the impact of the hammer.3.1.2 anvilthe mass at the top of the drill r
10、ods that isstruck by the hammer.3.1.3 drill rodsthe steel rods connecting the hammersystem above the ground surface to the sampler below thesurface.3.1.4 force transducera section of drill rod instrumentedwith strain gages and inserted into the continuous column ofdrill rods to measure the time-vary
11、ing force generated in thedrill rods by the impact of the hammer.3.1.5 hammeran impact mass that is raised and dropped tocreate an impact on the drill rods.3.1.6 impedance(of the drill rod)a property of the drillrod equal to the drill rod elastic modulus times the crosssectional area divided by the
12、velocity of wave propagation.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 Jan.1,2010.Published February 2010.Originallyapprov
13、ed in 2005.Last previous edition approved in 2005 as D4633 05.DOI:10.1520/D4633-10.2For 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 on
14、the ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.7 instrumented subassemblya short section of drill rodinstrumented to measure force and acceleration which isinserted at the top of the drill rod and below the anvil.3.1
15、.8 penetrometerany sampler,cone,blade,or otherinstrument placed at the bottom of the drill rods.3.2 Symbols:EFV=the energy transmitted to the drill rod from thehammer during the impact event(see 7.10).ETR=(EFV/PE)ratio of the measured energy transferredto the drill rods to the theoretical potential
16、energy.L=length between the location of transducers on the instru-mented subassembly and the bottom of the penetrometer.2L/c=the time required for the stress wave(traveling at aknown wave speed,c,in steel of 5123 m/s(16 810 ft/s)totravel from the measurement location to the bottom of thepenetrometer and return to the measurement location.N-value=the number of hammer blows required to advancethe sampler the last 0.305 m(1.00 ft)of the 0.457 m(1.5 ft)driven during an SPT test.PE=the theoretical po
