成都地铁区间隧道盾构施工引发地表沉降的数值模拟研究

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1、西南交通大学硕士学位论文成都地铁区间隧道盾构施工引发地表沉降的数值模拟研究姓名：王传琦申请学位级别：硕士专业：工程环境控制指导教师：牟瑞芳20080601西南交通大学硕士研究生学位论文第lI页AbstractShieldtunnelingisoneofthemostimportantmethodoftunnelconstruction,however，itwillbringinfluenceonambienceinevitably,especiallystratumsettlementisverydistinct．Soitisessentialt

2、ostudythestratumdisplacementcausedbyshieldtunneling．Thethesishasdiscussedtheshieldtunnelingprocessandinfluenceofstratumdisplacementdisturbercausedbyshieldtunnelconstruction．TheprocessofshieldtunnelingissimulatedandallkindsoffactorsareconsideredcarryinggroundsettlementbyusingF

3、initedifferencesoftwareoftheFLAC．SomerulesaboutStratumlongitudinalsettlement，CrosswisesettelmentandHorizontaldisplacementaregained，thentoproposemeasurestocontrolsettlement．Inthispaper,withthefunctionsofZeromodelandchangingthefunctionsofcellmaterialpropertiesandthestressreleas

4、eoftheFLACFinitedifferencesoftware，theprocessofshieldtunneling，pouringtliickliquidintoshieldtailandliningsupportingaresimulated．Butitdifficulttosimulateshieldtunnelingprocessdirectly，especiallyconsideringshieldtailcrevice，disturbancetothesurfaceoftunnelanddisposeingofpouringl

5、iquid．SoanothershieldtunnelingsimulatingmethodiSpresented，whichtransfersomevariable(suchasshieldtailcrevicesize，thedegreeofpouringthickliquidandthescopeofdisturbanceonsoilaroundthetunnelsurfaceetc，)closedtoconstructionbuthardtoscaletoisotropic，equalthicklayer．Thelatermethodno

6、tonlyobjectivelyreflecttheinflunceofsomenoteasyquantifiedfactorsonthesurfacedisplacementbutalsoavoidsattendtoonethingandloseanother．SothatitCanreflecttheactualsituationofprojectandsimplifythecomputationmodel．Theinfluenceoftunnelburyingdepth,Groutingtheendoftheshield,boringpre

7、ssureandtwo—lanetunneldifferentshieldexcavationprogramme，crosswiseandtheleveltothesettelmentinfluencearedetailedlyanalyzedinthispaper．Somechangingruleswhichchangeswithsomefactorsaregained,thentoproposemeasurestOcontrolsettlement．ItisexpectedthatitCantakesomeadviceontheproject

8、construction．西南交通大学硕士研究生学位论文第

9、If页Keyword：shieldtunnel；groundsettleme