地铁邻近桥梁施工既有桥梁现状评估和控制标准研究

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1、西南交通大学研究生学位论文地铁邻近桥梁施工既有桥梁现状评估和控制标准研究指导教师堡查堡墼垫笪堡鸯教高二OO六年十月西南交通大学硕士研究生学位论文第1I页系和安全性评价方法，以及“分级，分区，分阶段，按差异和绝对沉降指标进行控制”的控制指标制定原则，对邻近施工问题具有实用的参考价值，有助于实现对类似工程问题处理的流程化、规范化。关键词：地铁邻近桥梁现状评估控制标准西南交通大学硕士研究生学位论文第1II页AbstractMainBeijingsubwaylinesCROSSthecenteraldistrictofcity,wheremanyviaductsandelevated

2、pedestriancrossingshavebeenbuilt．Subwaywillinevitablycrossatthesidesoforunderthefoundationsofmunicipalbridges．Sosoildisplacementcausedbysubwayconstructionwillprobablycausethesettlementandadditionalstressofnearbybridgefoundations．Ifthesettlementandadditionalstressofnearbybridgefoundationsare

3、greaterthandeftuitevalues．thebridgeswillbedamaged，affectingthenodaluseorthesafetyofthesebridges．Toensurethenormaluseofthesenearbybridges，thestatusinvestigationandevaluation，theestablishmentofsettlementcontrolstandardofthesenearbybridgesshouldbecarriedoutintheconstruction．Atthesanletime，thec

4、onstructioninfluenceforecastwithconstructionstages，specialconstructionandprotectionmethodsshouldbeadoptedforthesafeandeconomicalconstruction．Nowthebasicprocedure，contentsandstandardsonsubwayconstructionnearbybridgesarenotsophisticated．ToprotectthesuIToundingenviromentanddecreasethesafetyris

5、kofsurroundingenviroment，itisurgenttostudythekeytechnicalproblemsoftheinflunceandcontrolofsubwayconstructionnearbybridges．Thestatusinvestigationandevaluation,theanalysisandforecastofconstructioninfluence，theestablishmentofsettlementcontrolstandardsofnearbyGuomaoOverpassaremainlystudiedinthi

6、sthesiscombinedwithGuomaoStationProjectofSubwayLine10．nlcstrengthofconcrete．thicknessofsteelcoveringlayerofuperstructure，piercolumn，andcopingaredetected．nemodalitytestanalysis，settlementcalculationandbeatingcapacityevaluationofpilefoundationareseparatelyfinishedaccordingtothedifferentstnlct

7、Ilralstylesofbeams．Thentheremainedpermissiondifferentialsettlementsbetweenadjacentbridgepiersarepresentedalongandacrossthebridge．3DnonlinearnumericalmodelincludingnorthwestductofGuomaoStationandnearbybridgepilesarefounded，constructionprocessesoftunnel·pi