地铁隧道盾构施工引起土体附加应力与地表沉降分析

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1、万方数据stresscausedbyshieldexcavationfaceadditionalthrustandfrictionbetweentheshellandthesurroundingsoilandthetailsoillOSS．3．analysissurfacegroundsubsidencefivestagesofvariationshieldtunnelexcavationbyuseoflongitudinalsettlementpointssubsidencecurvesgeneratedbythe

2、timingofconstructionwhentheshieldforward．ApplicationPeckformula，stochasticmediumtheory,usetheleastsquaresmethod，Powelloptimizationmethodinversionanalysislongitudinalsubsidenceformulaparameters．Andcalculatesshieldtunnelexcavationtransversesurfacesubsidencecurves

3、byuseingtheresults，findtheresultsconsistentwiththemeasuredvaluesobtained，confirmethecorrectnessoftheinversionparameters，andcanbeusedtoguidetheshieldconstruction．Considertheimpactofbuildingsstructuralrigiditywithinthescopeofthedistributionofsurfacesubsidencetrou

4、ghonthesurfacesubsidencetrough．UsethemodifiedPeckformulacalculatedbuildingsettlementCurvesandwiththecomparativeanalysisofPeckcalculatedsurfacesubsidencecurveswithengineeringexamples，reachconslusionthatThecalculateresultsofformulaPeckclosertothefieldmeasuredvalu

5、es．4．Analysisadditionaldistilbutionofsurroundingsoilanditsimpactonsurfacesubsidencbyapplicationlargegeneral—purposesoftwareABAOUSfiniteelementwhichestablishthree．dimensionalmodelshieldtunnelingstepexcavation，analysisandcontrasttheoreticalcalculationsandmeasured

6、valuestoguideconstruction．Keywords：subwaytunnel；shieldexcavation；additionalfield；surfacesubsidence；Peckformula；stochasticmediumtheory；parameterbackcalculation；numericalsimulationClassification：TU25IV万方数据目录摘要⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯IAbstract⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯

7、⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．III目录⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯V1绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．11．1课题背景⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11．2国内外研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯21．2．1地铁隧道盾构施工所引起的地层变形规律研究现状⋯⋯⋯⋯⋯⋯⋯．21．3隧道盾构施工对建筑物的影响研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯71．3．1盾构施工对

8、邻近建筑物影响机理⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．71．3．2盾构施工对邻近地表建(构)筑物影响研究现状⋯⋯⋯⋯⋯⋯⋯⋯．81．3．3地表建(构)筑物保护措施研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．91．4本文的主要研究内容及方法⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．101．4．1研究内容⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯lO1．