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Astm D 2573-94 Standard Test Method For Field Vane Shear Test In Cohesive Soil. Uploaded by: Pablo Antonio Valcárcel Vargas; 0; 0. January 2020; PDF TXT. PDFCOOKIE Home(current) Explore ExploreAll Upload Login/ Register Home AstmD2573-94StandardTestMethodForFieldVaneShearTestInCohesiveSoil AstmD2573-94StandardTestMethodForFieldVaneShearTestInCohesiveSoil Uploadedby:PabloAntonioValcárcelVargas 0 0 January2020 PDFTXT Bookmark Embed Share Print SAVETHISDOCUMENT Thisdocumentwasuploadedbyuserandtheyconfirmedthattheyhavethepermissiontoshare it.Ifyouareauthororownthecopyrightofthisbook,pleasereporttousbyusingthisDMCA reportform.ReportDMCA Overview Download&ViewAstmD2573-94StandardTestMethodForFieldVaneShearTestInCohesiveSoilasPDFforfree. Moredetails Words:2,266 Pages:3 Preview Fulltext Designation:D2573–94AMERICANSOCIETYFORTESTINGANDMATERIALS100BarrHarborDr.,WestConshohocken,PA19428ReprintedfromtheAnnualBookofASTMStandards.CopyrightASTM StandardTestMethodfor FieldVaneShearTestinCohesiveSoil1ThisstandardisissuedunderthefixeddesignationD2573;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense. geotechnicalexplorations,suchasincaseswhereasampleforlaboratorytestingcannotbeobtained. 1.Scope*1.1Thistestmethodcoversthefieldvanetestinsoft,saturated,cohesivesoils.Knowledgeofthenatureofthesoilinwhicheachvanetestistobemadeisnecessaryforassessmentoftheapplicabilityandinterpretationofthetest.1.2Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.TheSIunitsgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse. 4.Apparatus4.1Thevaneshallconsistofafour-bladedvaneasillustratedinFig.1.Theheightofthevaneshallbetwicethediameter.VanedimensionsshallbeasspecifiedinTable1.SizesotherthanthosespecifiedinTable1shallbeusedonlywiththepermissionoftheengineerinchargeoftheboringprogram.Theendsofthevanemaybetapered(seeFig.1).Thepenetratingedgeofthevanebladeshallbesharpenedhavinganincludedangleof90°.4.2Thevaneshallbeconnectedtothesurfacebymeansofsteeltorquerods.Theserodsshallhavesufficientdiametersuchthattheirelasticlimitisnotexceededwhenthevaneisstressedtoitscapacity(Note1).Theyshallbesocoupledthattheshouldersofthemaleandfemaleendsshallmeettopreventanypossibilityofthecouplingtighteningwhenthetorqueisappliedduringthetest.Ifavanehousingisused,thetorquerodsshallbeequippedwithwell-lubricatedbearingswheretheypassthroughthehousing.Thesebearingsshallbeprovidedwithsealstopreventsoilfromenteringthem.Thetorquerodsshallbeguidedsoastopreventfrictionfromdevelopingbetweenthetorquerodsandthewallsofcasingorboring. 2.SummaryofTestMethod2.1Thevanesheartestbasicallyconsistsofplacingafour-bladedvaneintheundisturbedsoilandrotatingitfromthesurfacetodeterminethetorsionalforcerequiredtocauseacylindricalsurfacetobeshearedbythevane;thisforceisthenconvertedtoaunitshearingresistanceofthecylindricalsurface.Itisofbasicimportancethatthefrictionofthevanerodandinstrumentbeaccountedfor;otherwise,thefrictionwouldbeimproperlyrecordedassoilstrength.Frictionmeasurementsunderno-loadconditions(suchastheuseofablanksteminplaceofthevanes,oravanethatallowssomefreerotationoftherodpriortoloading)aresatisfactoryonlyprovidedthatthetorqueisappliedbyabalancedmomentthatdoesnotresultinasidethrust.Astorsionalforcesbecomegreaterduringatest,asidethrustintheinstrumentwillresultinanincreaseinfrictionthatisnotaccountedforbyinitialno-loadreadings.Instrumentsinvolvingsidethrustarenotrecommended.Thevanerodmaybeofsufficientrigiditythatitdoesnottwistunderfullloadconditions;otherwiseacorrectionmustbemadeforplottingtorque-rotationcurves. NOTE1—Iftorqueversusrotationcurvesaretobedetermined,itisessentialthatthetorquerodsbecalibrated(priortouseinthefield).Theamountofrodtwist(ifany)mustbeestablishedindegreesperfootperunittorque.Thiscorrectionbecomesprogressivelymoreimportantasthedepthofthetestincreasesandthecalibrationmustbemadeatleasttothemaximumdepthoftestinganticipated: 4.3Torqueshallbeappliedtothetorquerods,thencetothevane.Theaccuracyofthetorquereadingshouldbesuchthatitwillproduceavariationnottoexceed625lb/ft2(1.20kPa)shearstrength.4.4Itispreferabletoapplytorquetothevanewithageareddrive.Intheabsenceofageareddrive,itisacceptabletoapplythetorquedirectlybyhandwithatorquewrenchorequivalent.Thedurationofthetestshouldbecontrolledbytherequirementsof5.3. 3.SignificanceandUse3.1Thistestmethodprovidesanindicationofin-situshearstrength.3.2Thistestmethodisusedextensivelyinavarietyof 5.Procedure5.1Inthecasewhereavanehousingisused,advancethehousingtoadepthwhichisatleastfivevanehousingdiameterslessthanthedesireddepthofthevanetip.Wherenovane 1 ThistestmethodisunderthejurisdictionofASTMCommitteeD-18onSoilandRockandisthedirectresponsibilityofSubcommitteeD18.02onSamplingandRelatedFieldTestingforSoilInvestigations.CurrenteditionapprovedSept.15,1994.PublishedNovember1994.OriginallypublishedasD2573–67T.LastpreviouseditionD2573–72(1978). *ASummaryofChangessectionappearsattheendofthisstandard. 1 D2573immediatelyaftercompletionofrapidrotationandinallcaseswithin1minaftertheremouldingprocess.5.5Inthecasewheresoilisincontactwiththetorquerods,determinethefrictionbetweenthesoilandtherodbymeansoftorquetestsconductedonsimilarrodsatsimilardepthswithnovaneattached.Conducttherodfrictiontestatleastonceoneachsite;thisshallconsistofaseriesoftorquetestsatvaryingdepths.5.6Inapparatusinwhichthetorquerodiscompletelyisolatedfromthesoil,conductafrictiontestwithablankrod(Note2)atleastonceoneachsitetodeterminethemagnitudeofthefrictionofthebearings.Inaproperlyfunctioningvaneapparatus,thisfrictionshouldbenegligible.NOTE2—Insomecasesitisnotnecessarytoremovethevaneforthefrictiontest.Aslongasthevaneisnotincontactwiththesoil,thatis,whereitisretractedintoacasing,thefrictionmeasurementisnotaffected. 5.7Conductundisturbedandremouldedvanetestsatintervalsofnotlessthan2|n$ft(0.76m)throughoutthesoilprofilewhenconditionswillpermitvanetesting(Note3).Donotconductthevanetestinanysoilthatwillpermitdrainageordilatesduringthetestperiod,suchassandsorsiltsorinsoilswherestonesorshellsareencounteredbythevaneinsuchamannerastoinfluencetheresults.NOTE3—Thisspacingmaybevariedonlybytheengineerinchargeoftheboringprogram. FIG.1GeometryofFieldVane 6.Calculation6.1Calculatetheshearstrengthofthesoilinthefollowingmanner:Theturningmomentrequiredtoshearthesoilisasfollows: housingisused,stoptheholeinwhichthevaneisloweredatadepthsuchthatthevanetipmaypenetrateundisturbedsoilforadepthofatleastfivetimesthediameterofthehole.5.2Advancethevanefromthebottomoftheholeorthevanehousinginasinglethrusttothedepthatwhichthetestistobeconducted.Takeprecautionstomakesurenotorqueisappliedtothetorquerodsduringthethrust.5.3Withthevaneinposition,applythetorquetothevaneataratewhichshouldnotexceed0.1°/s.Thisgenerallyrequiresatimetofailureoffrom2to5min,exceptinverysoftclayswherethetimetofailuremaybeasmuchas10to15min.Instiffermaterials,whichreachfailureatsmalldeformations,itmaybedesirabletoreducetherateofangulardisplacementsothatareasonabledeterminationofthestress-strainpropertiescanbeobtained.Duringtherotationofthevane,holditatafixedelevation.Recordthemaximumtorque.Withapparatuswithgeareddrives,itisdesirabletorecordintermediatevaluesoftorqueatintervalsof15soratlesserfrequencyifconditionsrequire.5.4Followingthedeterminationofthemaximumtorque,rotatethevanerapidlythroughaminimumof10revolutions;thedeterminationoftheremouldedstrengthshouldbestarted T5s3K where:T5torque,lbf·ft(orN·m),s5shearstrengthoftheclay,lbf/ft2(orkPa),andK5constant,dependingondimensionsandshapeofthevane,ft3(orm3).6.2Assumingthedistributionoftheshearstrengthisuniformacrosstheendsofacylinderandaroundtheperimeter,calculatethevalueofKasfollows:Inch-PoundUnits:K5~p/1728!3~D2H/2!3@11~D/3H!# MetricUnits:K5~p/106!3~D2H/2!3@11D/3H!# where:D5measureddiameterofthevane,in.(orcm),and TABLE1RecommendedDimensionsofFieldVanesACasingSize Diameter,in.(mm) Height,in.(mm) AXBXNX4in.(101.6mm)B 11⁄2(38.1)2(50.8)21⁄2(63.5)35⁄8(92.1) 3(76.2)4(101.6)5(127.0)71⁄4(184.1) A ThicknessofBlade,in.(mm)⁄⁄1⁄81⁄8 116116 DiameterofVaneRod,in.(mm) (1.6)(1.6)(3.2)(3.2) Selectionofthevanesizeisdirectlyrelatedtotheconsistencyofthesoilbeingtested,thatis,thesofterthesoilthelargerthevanediameter.Insidediameter. B 2 ⁄⁄1⁄21⁄21212 (12.7)(12.7)(12.7)(12.7) D2573H5measuredheightofvane,in.(orcm).Itisimportantthatthesedimensionsarecheckedperiodicallytoensurethevaneisnotdistortedorworn.6.3Astheratiooflengthtobreadthofthevaneis2:1,thevalueofKmaybesimplifiedintermsofthediametersothatitbecomesthefollowing:Inch-PoundUnits: 7.1.2Boringnumber,7.1.3Sizeandshapeofthevane(taperedorrectangular),7.1.4Depthofthevanetip,7.1.5Depthofthevanetipbelowthehousingorbottomofthehole,7.1.6Maximumtorquereading,andintermediatereadingsifrequiredfortheundisturbedtest,7.1.7Timetofailureofthetest,7.1.8Rateofremoulding,7.1.9Maximumtorquereadingfortheremouldedtest,and7.1.10Notesonanydeviationsfromstandardtestprocedure.7.2Inaddition,recordthefollowingobservationsfortheboring:7.2.1Boringnumber,7.2.2Location,7.2.3Logofthesoilconditions,7.2.4Referenceelevation,7.2.5Methodofmakingthehole,7.2.6Descriptionofthevane,thatis,housedornot,7.2.7Descriptionofthemethodofapplyingandmeasuringthetorque,7.2.8Notesonthedrivingresistance,7.2.9Nameofthedrillingforeman,and7.2.10Nameofthesupervisingengineer. K50.0021D3 MetricUnits:K50.00000366D3 6.4Sincethevalueofsisrequired,itismoreusefultowritetheequationasfollows:s5T3k where:k5l/KandT,thetorque,ismeasuredsothatscanbecalculated.6.5ForthetaperedvaneofFig.1,thefollowingmodifiedequationmaybeusedforthevaneconstant:Inch-PoundUnits:K51/[email protected]~2D32d3!# MetricUnits:K51/[email protected]~2D32d3!# where:d5roddiameter,in.(cm).Fora1⁄2-in.(1.27-cm)rodthisreducesto:Inch-PoundUnits: 8.PrecisionandBias8.1Precision—Avalidestimateoftestprecisionhasnotbeendeterminedbecauseitistoocostlytoconductthenecessaryinter-laboratory(field)tests.SubcommitteeD18.02welcomesproposalstoallowdevelopmentofavalidprecisionstatement.8.2Bias—Becausethereisnoreferencematerialforthistestmethod,therecanbenobiasstatement. K50.00225D320.00003 MetricUnits:K50.00000388D320.00000076 7.Report9.Keywords 7.1Foreachvanetestrecordthefollowingobservations:7.1.1Dateofthetest, 9.1In-situtest;shearstrength SUMMARYOFCHANGESThissectionidentifiestheprinciplechangestothistestmethodthathavebeenincorporatedsincethelastissue.(1)Thefollowingsectionswereadded;1.2,3,7and8.TheAmericanSocietyforTestingandMaterialstakesnopositionrespectingthevalidityofanypatentrightsassertedinconnectionwithanyitemmentionedinthisstandard.Usersofthisstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtheriskofinfringementofsuchrights,areentirelytheirownresponsibility.Thisstandardissubjecttorevisionatanytimebytheresponsibletechnicalcommitteeandmustbereviewedeveryfiveyearsandifnotrevised,eitherreapprovedorwithdrawn.YourcommentsareinvitedeitherforrevisionofthisstandardorforadditionalstandardsandshouldbeaddressedtoASTMHeadquarters.Yourcommentswillreceivecarefulconsiderationatameetingoftheresponsibletechnicalcommittee,whichyoumayattend.IfyoufeelthatyourcommentshavenotreceivedafairhearingyoushouldmakeyourviewsknowntotheASTMCommitteeonStandards,100BarrHarborDrive,WestConshohocken,PA19428. 3 RelatedDocuments AstmD2573-94StandardTestMethodForFieldVaneShearTestInCohesiveSoil January2020 64 VaneShearTest February2020 23 LaboratoryReportVaneShearTest January2020 26 Astm-d-2573VaneShearTest.pdf January2020 83 StandardTestMethodForStrain November2019 76 AstmD523-08StandardTestMethodForSpecularGloss December2019 81 MoreDocumentsfrom"PabloAntonioValcárcelVargas" January2020 44 October2019 64 January2020 48 StructuralDynamics-HirokiYamaguchi December2019 60 Mathcad-CerchaConFuerzasCambioDeTempYErroresCaso4Okay November2019 50 ManualCuenta December2019 36 Copyright©2022PDFCOOKIE.