Designation:D3550−01(Reapproved2007)StandardPracticeforThickWall,Ring-Lined,SplitBarrel,DriveSamplingofSoils1ThisstandardisissuedunderthefixeddesignationD3550;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thispracticecoversprocedureforthickwall,splitbarreldrivesamplingofsoiltoobtainrepresentativesamplesofsoilforclassificationandlaboratorytesting.Thesampleriscon-sideredtobeathickwallsamplerwithsharpenedcuttingshoeandballcheckvent.Themiddlebarrelsectionisoftenofsplitbarreldesign,butasolidbarrelcanbeusedandbothmaycontainringliners.Thesamplerisoftendriven,butcanalsobepushedinsofterdeposits.Penetrationresistancedatamayberecorded.ThisstandardusesproceduressimilartoTestMethodD1586onPenetrationResistanceandSplitBarrelSamplingofSoils.However,inthispractice,differinghammerweights,dropheights,anddifferentsizesamplersareused,sothedatamustnotbereportedasconformingtoTestMethodD1586andcannotbeusedtodetermineNormalizedpenetrationresistancedataforsandsinaccordancewithPracticeD6066.1.2Thispracticeinvolvesuseofrotarydrillingequipment(GuideD5783,PracticeD6151).Otherdrillingandsamplingprocedures(GuideD6286,GuideD6169)areavailableandmaybemoreappropriate.Considerationsforhanddrivingorshallowsamplingwithoutboreholesarenotaddressed.Sub-surfaceinvestigationsshouldberecordedinaccordancewithpracticeGuideD5434.SoilsamplesshouldbeclassifiedinaccordancewithPracticeD2488.1.3Thispracticemayormaynotprovideasamplesuitableforadvancedlaboratorytestssuchasshearorconsolidationtesting.Itisuptotheusertodetermineifthesamplequalityissuitableforadvancedlaboratorytestingforengineeringprop-erties.DrivensamplescanbemoreeasilydisturbedthanpushedsamplessuchasthethinwalltubeinaccordancewithPracticeD1587.However,thinwalltub...
