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1、万方数据Subject:StudyonSurfaceandBuildingFoundationDeformationInducedbyMetroShieldConstructionandItsControlTechnologySpecialty:GeotechnicalEngineeringName:ShiJingyang（Signature）Instructor:RenJianxi（Signature）ABSTRACTStudyonthelawsofsurfacedeformationcausedbythetunnelshieldconstructionandhowtocontrol
2、thenearbysurfacestructuresdeformationhasimportanttheoreticalsignificanceandimportantapplicationvalueintheXi'anloessarea.BasedonXi'ansubwaylinethreefromDayanPagodatoBeichiTou,usingtheoreticalanalysis,numericalsimulationandengineeringpracticetostudy.Themajorworkandconclusionsasfollows:(1)Combinedw
3、iththegroundsettlementcausedbyearthpressurebalanceshieldtunnelling,itisconcludedthatthemainfactorsaffectingthesurfacesubsidenceare:propertiesoflayer,constructionmethod,tunneldepth,theformandsizeofupperload,sectionformandsizeoftunnel,theformsofthesupportingstructucresandconstructionmanagementetc.
4、Surfacedeformationcausedbysoildeformationwhichisaroundthebuildingfoundation,theneffectbuildingstructuredeformation,buildingdependsmainlyonfoundationstiffnesstoresistancedeformationofsoil,proposedtheeffectsofshieldtunnelconstructionbasisofdifferentbuildings.(2)Withthenumericalsimulationsoftwarena
5、medFLAC,Surfacedeformationinnormalconstructionprocesswaspredicted.Thepredictionresultsshowthatbuildingsettlementwassolargethatitexceededtheallowabledeformationvalueswhenreinforcementmeasureswasn’tbeusedinconstructionprocess.(3)Basedonpecktheory,controlmeasuresofsurfaceandbuildingdeformationinduc
6、edbyshieldconstructionwereputforword.CombinedwiththeactualsituationfromDaYanPagodatoBeiChitou,Surfacedeformationallowablevaluesinducedbyshieldconstructionwasformulted.(4)Combininggeologicalstructureinthesection,correspondingdeformationcontroltechnologyonconstructionprocesswasputforward:sleeveval
7、vebarrelgrouting,toensureshieldsteadyprogressbyreducingshieldconstructionspeed,enhancingamountofsynchronizationgrouting,amountofhoopsupplementpulp,toensuredistancealongtunneltrendoftwoshield万方数据machineshieldconstructiontechn
