卵石地层明挖铁路隧道近接施工技术分析

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1、西南交通大学硕士研究生学位论文第1l页AbstractAtpresent，almostalllargeandmedium-sizedcitiesacrossthecountryareintheconstructionofthesubway,alargepartofthesubwayprojectsareconstructedbytheopenandcovermethodforreasonsofeconomyandsafety,etc．Itwillinvolvepassingthroughthecomplexundergroundstructurestakingtheopena

2、ndcovermethodincities，Theinevitablesubsidencemayendangerthesurroundingbuildingstructures，Inordertoensuresafetyconstruction，ThispapercarriesoutthefollowingstudiescombiningChengmianlelineAirportRoadTunnel、ShuanliuAirportTunnelandChengguanlineLiduiParkbranchtunnel：(1)Accordingtothestochasticme

3、diumtheory，predictedthesurroundingsurfacesedimentationcausedbyopenandcovermethodwithMatlab7．0．(2)Considering3maininfluencefactors：thedistancebetweenbuildingsandtunnels，thelengthandthestiffnessofthestructureinthedirectionoftheconsideringsection，putforwardthecalculationmethodofsettlementofsha

4、llowfoundationbuildingsintypicalgravelstratabasedonthepredictionofsurfacesubsidence．(3)Identifiedthedeformationcontrolvalueoftunnelsconstructedapproachingmunicipalpipelinesbyopenandcovermethod，bridgepilefoundationandbuildingsbyinvestigationandcombiningwiththeprojectinwhichlargediametermunic

5、ipalpipegalleriesstrideacrosspitfoundation．(4)IdentifiedtheadjacentpartitionintheconstructionofopencuttunnelsintypicalgravelstratabyresearchingpitfoundationprojectsconstructedapproachingbuildingstructuresinChengduarea，andnumericalanalysingbyparticleflowcodesoftwarePFC3D．(5)Whenthebuildingst

6、ructureisentirelylocatedononesideofthepitfoundation，putforwardtherelevantcontrolmeasureSofbuildingstructuresindifferentareasoftheadjacentpartition,andverifytheeffectivenessofgroutingreinforcementwhenbuildingstructuresareinthestronginfluencearea．(6)Whenbuildingstructuresstrideacrosspitfounda

7、tion,forthelargediametermunicipalpipegalleries，itisappropriatetotakethecontrolmeasureofsettingsupportthroughtheschemecomparisonandsafetyevaluationofconstruction；forbridges，pilefoundationunderpinningCanensuretheirsafetyinconstructionofopencuttunnelwhennec