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循环荷载作用下改良黄土路基变形特性室内动态模型试验研究的开题报告.docx

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循环荷载作用下改良黄土路基变形特性室内动态模型试验研究的开题报告 【Abstract】 Withtherapiddevelopmentoftransportation,theengineeringprojectsbuiltonimprovedloessfoundationhavebecomeincreasinglycommon.However,thedeformationcharacteristicsofimprovedloessfoundationundercyclicloadstillneedtobefurtherexplored.Therefore,inthisstudy,adynamicmodeltestwascarriedouttoinvestigatethedeformationcharacteristicsofimprovedloessfoundationundercyclicload.Thestudyaimedtoprovideatheoreticalandtechnicalbasisforevaluatingtheroadsafetyofimprovedloessfoundation. 【Introduction】 LoessiswidelydistributedinChina,anditisoftenchosenasthefoundationforroads,bridgesandothermajorinfrastructure.However,loesshasmanyunstablefeaturesthatmakeitvulnerabletonaturalcalamitiessuchaslandslidesorslopecollapse.Soilimprovementtechniqueshavebeenusedinpracticetodealwiththisproblem,amongwhichlimeandcementstabilizationarethemostfrequentlyusedmethods. Inroadengineeringconstruction,cyclicloadingisinevitableduetotrafficandweather.However,littleresearchhasbeendoneonthedeformationcharacteristicsofimprovedloessfoundationundercyclicloading. Thisstudyaimstoinvestigatethedeformationcharacteristicsofimprovedloessfoundationundercyclicloadthroughdynamicmodeltestandprovideatheoreticalandtechnicalbasisforevaluatingthesafetyofimprovedloessfoundationinroadandbridgeengineering. 【ResearchObjectiveandSignificance】 Theobjectiveofthestudyistoinvestigatethedeformationcharacteristicsofimprovedloessfoundationundercyclicload.Thisstudywillattempttoanswerthefollowingresearchquestions: 1.Whatchangesoccurinthedeformationofimprovedloessfoundationundercyclicloading? 2.Howdofactorssuchasthecyclicloadingfrequencyandintensityaffectthedeformationcharacteristicsofimprovedloessfoundation? Thesignificanceofthisstudyliesinthefollowingaspects: 1.Providingtheoreticalsupportandtechnicalbasisforevaluatingthesafetyofimprovedloessfoundationinroadandbridgeengineering. 2.Providingaguidefortheselectionofappropriatesoilimprovementtechniquesforloessfoundationinroadandbridgeconstructionengineering. 【