ASTM_D_1586_-_D_1586M_-_18e1.pdf

Designation:D1586/D1586M181Standard Test Method forStandard Penetration Test(SPT)and Split-Barrel Samplingof Soils1This standard is issued under the fixed designation D1586/D1586M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1NOTEReference(14)was editorially corrected in April 2022.1.Scope*1.1 This test method describes the procedure,generallyknown as the Standard Penetration Test(SPT),for driving asplit-barrel sampler with a 140 lb 63.5 kg hammer dropped30 in.750 mm to obtain a soil sample for identificationpurposes,and measure the resistance of the soil to penetrationof the standard 2 in.50 mm diameter sampler.The SPT“N”value is the number of hammer blows required to drive thesampler over the depth interval of 0.5 to 1.5 ft 0.15 to 0.45 mof a 1.5 ft 0.45 m drive interval.1.2 Test Method D4633 is generally necessary to measurethe drill rod energy of a given drop hammer system and usingthe measured drill rod energy,N values can be corrected to astandard energy level.Practice D6066 uses Test MethodsD1586 and D4633 and has additional requirements forhammers,hammer energy,and drilling methods to determineenergy corrected penetration resistance of loose sands forliquefaction evaluation.1.3 Practice D3550/D3550M is a similar procedure using alarger diameter split barrel sampler driven with a hammersystem that may allow for a different hammer mass.Thepenetration resistance values from Practice D3550/D3550M donot comply with this standard.1.4 Test results and identification information are used insubsurface exploration for a wide range of applications such asgeotechnical,geologic,geoenvironmental,or geohydrologicalexplorations.When detailed lithology is required for geohy-drological investigations,use of continuous sampling methods(D6282/D6282M,D6151/D6151M,D6914/D6914M)are rec-ommended when the incremental SPT N value is not neededfor design purposes(see 4.1.1).1.5 Penetration resistance testing is typically performed at 5ft 1.5 m depth intervals or when a significant change ofmaterials is observed during drilling,unless otherwise speci-fied.1.6 This test method is limited to use in nonlithified soilsand soils whose maximum particle size is approximately lessthan one-half of the sampler diameter.1.7 This test method involves use of rotary drilling equip-ment(Guide D5783,Practice D6151/D6151M).Other drillingand sampling procedures(Guides D6286 and D6169/D6169M)are available and may be more appropriate.Considerations forhand driving or shallow sampling without boreholes are notaddressed.Subsurface investigations should be recorded inaccordance with Practice D5434.Samples should be preservedand transported in accordance with Practice D4220/D4220Musing Group B.Soil samples should be identified by groupname and symbol in accordance with Practice D2488.1.8 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026,unless superseded by this test method.1.8.1 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.1.9 UnitsThe values stated in either inch-pound or SIunits presented in brackets are to be regarded separately asstandard.The values stated in each system may not be exactequivalents;therefore,each system shall be used independentlyof the other.Combining values from the two systems mayresult in non-conformance with the standard.Reporting of testresults in units other than inch-pound shall not be regarded as1This 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 Dec.1,2018.Published December 2018.Originallyapproved in 1958.Last previous edition approved in 2011 as D1586 11.DOI:10.1520/D1586_D1586M-18E01.*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 e