砂卵石地层不同盾构机开挖引起地表沉降特征与控制分析

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1、西南交通大学硕士研究生学位论文第ll页AbstractInurbansubwayconstruction，constructionofshieldtunnelingmethodiswidelyused．ChengducobblegroundexperienceintheconstructionofLine1，Herrenknechtearthpressurebalanceshieldmachineconstructioneffectisbetter,alittlefasterconstruction．Inordertoexploreothertypesofshiel

2、dmachinetoadaptandbroadentheirthinking，savingthecostoftheprojectbuydifferentproductsshieldmachineconstructioncameintobeing．ThisarticleisbasedontheworksofChengduMetroLine2Phase2(Westextensionline)shieldmethodconstructionfromtheChengduregioncharacteristics，mechanicalpropertiesandapplicab

3、ilityofexistingshieldmachine，theconstructionofsurfacesubsidencecurve，idealnumericalsimulationthesurfacesubsidenceexplore．Themaincontentsareasfollows：(1)OntheChengduformationshieldconstructionfeatures，difficultyandkeyissuestosortout；(2)Themechanicalpropertiesofthetwoshieldmachinearedesc

4、ribedandevaluation；(3)Theproblemsoftheshieldmachineboringtransformationopinion；(4)Basedonthemeasuredsurfacesettlementdata,subsidencecurvesandanalyzed；(5)Finitedifferencesoftwarefornumericalsimulationofthetunnelexcavationexplorethecharacteristicsofsurfacesubsidence．Inthecourseofthestudy

5、,summaryofcomparativeanalysis，putforwardthecorrespondingimprovementmeasuresinthecaseoftheachievementoftheimprovementmeasures，combined谢tllpracticalengineeringanalysisoftheeffectoftheimprovement．Andstatisticsofthemeasureddataandthesimulatedexcavation，summedupthecharacteristicsofsurfacesu

6、bsidence．Therefore，thisstudywillhaveaguidingsignificanceforthefutureofthesetwoshieldmachineuse．Keywords：Theshieldconstruction；Surfacesubsidence；Shieldmachine；Settlementcurve；Numericalsimulation西南交通大学硕士研究生学位论文第lll页目录第一章绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11．1选题背景⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．11．2国内外研究现状

7、总结⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．21．2．1地表沉降的特征⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．31．2．2地表沉降的机理⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．41．3成都地区盾构法施工情况⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．51．3．1成都地区地层特点⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．51．3．2成都地区盾构法施工的难点⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．61．3．3成都地区盾构法施工的关键技术⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯一61．4目前存在的问题⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．71．5本文研究内容及方法⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯