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ID:33127119
大小:15.65 MB
页数:117页
时间:2019-02-20
《某盾构下穿北京地铁双线盾构区间结构变形分析与控制-研究》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、万方数据ABSTRACTABSTRACT:Astherailtransitnetworkcontinuestoexpandandgroundbuildingsbecomemoreintensive.Someofthenewlyconstructedmelrolineswillcrossthemunicipalpipelinesandexistinglinesinevitably,especiallyprojectofshieldtunnelundercrossingtheexistingsubwayshieldsectioninshortverticaldista
2、ncewithgreatdifficultyandhighrequirement.Therefore,itisnecessarytocarryoutsystematicresearchofthedeformationlawoftheexistinglinesandthedynamicresponseoftrackstructureintheprojectofshieldtunnelundercrossingtheexistingsubwayshieldinterval,SOastooptimizeconstructioncontrolmeasuresinorder
3、toguaranteethesafetyoftheexistingsubwayoperation.Withtherapiddevelopmentofrailtransit,crossingprojectsareincreasing,thisresearchisinstructivetothedevelopmentofurbansubwayandundergroundengineering.Basedonwidelyliteraturereview,theprojectofashieldtunnelundercrossingtheexistingsubwaydoub
4、leshieldsectionistakenastheresearchobject,intheproject,theverticaldistancebetweenshieldtunnelandtheexistingsubwaysectionis6m(1.OD)andtheexsitingsubwayisintheshieldstronglyaffectedzone.Inadditiontheprojecthasthecharacteristicsofcomplicatedvariabilityofgeologicalconditionandprojectuncer
5、tainty.However,thesettlementoftheexistingsubwaystructureisonly0.98mmintheprocessofshieldcrossing.ThisisthefirsttypicalengineeringthattheshieldtunnelcrossestheexistingsubwayshieldsectionsuccessfullyintheBeijingarea.Themainresearchcontentsareasfollows:(1)UsefiniteelementsoRwareANSYStoes
6、tablishthree—dimensionalstratumstructuremodel,toanalyzetheinfluenceontheexistingsubwaysectioncrossedbyshieldconstructionbasedonthetheoryofcontinuousmedium.(2)Combinedwiththeactualconstructionsituation,throughtheanalysisofmonitoringdataintheconstructionprocessandcomparingwithsimulation
7、results,toverifytheaccuracyofsimulation,thentoconcludetheinfluenceregularityontheexistingsubwaycausedbysynchronousgroutingandsecondarygrouting.(3)Basedonthesuccessofcrossingprojectandcombinedwiththenumericalpredictionandanalysisofmonitoringdata,aswhileasthemanagementprocessofthecase,a
8、preli
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