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基于室内试验和离散元模拟的砂土强度研究.docx

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基于室内试验和离散元模拟的砂土强度研究为题目，写不少于1200的论文 I.Introduction Soilisabasicandfundamentalelementoftheearth'scrustthatplaysacrucialroleinvariousgeotechnicalprojects,rangingfromfoundationdesigntoconstructionofroadsandrailways.Oneofthesignificantcharacteristicsofsoilisitsstrength,whichdeterminesitssuitabilityforvariousgeotechnicalapplications.Researchersandengineershavemadesignificanteffortstoinvestigatethestrengthofsoilinthepastdecades,usinglaboratorytestmethodsandnumericalsimulations.Thisstudyaimstoevaluatethestrengthofsandusingindoorlaboratorytestinganddiscreteelementmodeling(DEM).Therestofthepaperpresentsexperimentalandnumericalapproachestoinvestigatethepropertiesofsandanddiscussesthefindings. II.LiteratureReview Thestrengthofsoildependsonvariousfactorssuchassoilcomposition,moisture,density,andstresshistory.Thesoilstrengthcanbeanalyzedusingdifferentmethods,includinglaboratorytests,fieldtests,andnumericalsimulations.Experimentalmethodsarewidelyusedtoevaluatesoilstrength,whichincludesdirectsheartests,triaxialtests,anduniaxialcompressiontests.Thesetestshelpindeterminingtheshearstrength,deformationproperties,andstress-strainbehaviorofsoil. Anotherapproachforevaluatingsoilstrengthisnumericalsimulations,whichusefiniteelementanalysis(FEA)ordiscreteelementmodeling(DEM).FEAandDEMarepowerfultoolsforpredictingthebehaviorofsoil,whichcanbeusefulindesigninggeotechnicalstructuresandpredictingsoilfailuremechanisms.DEMhasbecomeincreasinglypopularinrecentyearsduetoitsabilitytorepresentsoilbehaviorwithindividualparticles.DEMconsidersthesoilasanassemblyofdiscreteparticlesthatinteractwitheachotherthroughcontactforces,andthesolutionprovidesinformationaboutparticlemotion,deformation,andstressdistribution. Severalstudieshaveinvestigatedthestrengthofsandusingbothlaboratorytestsandnumericalsimulations.Shangetal.(2021)analyzedthestrengthpropertiesofsandusingacombinationoflarge-scaletriaxialcompressiontestsandDEMsimulations.Theresultsshowedthatthepeakandresidualshearstrengthofsandincreasewithincreasingcon