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卸载对粗砂抗剪强度影响的直剪试验研究.docx

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卸载对粗砂抗剪强度影响的直剪试验研究 Abstract Thisstudyaimstoinvestigatetheeffectofconsolidationontheshearstrengthparametersofcoarsesandbyperformingdirectsheartests.Thesampleswerepreparedatdifferentconsolidationpressuresandtestedunderdrainedconditions.Thetestresultsshowedthattheshearstrengthparametersofthesampleswereaffectedbytheconsolidationpressure.Whentheconsolidationpressureincreased,thepeakshearstrengthandresidualshearstrengthalsoincreased.Thetestresultsofthisstudycanbeusefulinunderstandingandpredictingthebehaviorofcoarsesandinvariousengineeringapplications. Introduction Coarsesandisawidelyusedmaterialinengineeringapplicationssuchasfoundationdesign,embankmentconstruction,androadpavement.Theshearstrengthparametersofcoarsesandareessentialtounderstandthebehaviorofthematerialunderdifferentloadingconditions.Theshearstrengthparameterscanbeinfluencedbyseveralfactors,includingstresshistory,particlesize,particleshape,andconsolidation.Amongthesefactors,consolidationisoneofthecrucialfactorsthatshouldbeconsideredinthedesignofengineeringstructures. Consolidationistheprocessbywhichthesoilparticlesarecompactedduetotheincreaseintheverticalstress.Duringconsolidation,thesoilvolumedecreases,andtheporewaterpressuredecreases.Theconsolidationprocesscanaffecttheshearstrengthparametersofsoilandalterthedeformationbehaviorofthesoil.Therefore,itisessentialtoinvestigatetheeffectofconsolidationontheshearstrengthparametersofsoiltopredictthebehaviorofsoilunderdifferentloadingconditions. Inthisstudy,theeffectofconsolidationontheshearstrengthparametersofcoarsesandwasinvestigatedthroughdirectsheartestsunderdrainedconditions. MaterialsandMethods Materials Thesampleusedinthisstudywasacoarsesandthatwasobtainedfromaquarrynearthestudyarea.Theparticlesizedistributionofthesandwasdeterminedbysieveanalysis,andtheresultsareshowninTable1. Table1:Particlesizedistributionofthesand Particlesize(mm)Percentagepassing(%) 4.75100 2.3698 1.1889 0.665 0.335 0.1510 0.0752 Methods SamplePreparation Cylindricalsampleswithadiameterof60