地鐵隧道盾構施工引起的地表變形規(guī)律研究.pdf

1、西安科技大學碩士學位論文地鐵隧道盾構施工引起的地表變形規(guī)律研究姓名：馮超申請學位級別：碩士專業(yè)：防災減災工程及防護工程指導教師：任建喜@Subject:StudyontheGroundSurfaceDefmationLawsInducedbyMetroShieldTunnelConstructionSpecialty:DisasterPreventionReductionProtectiveEngineeringName:FengCha

2、o（Signature）Instruct:ProfessRenJianxi（Signature）ABSTRACTShieldconstructioninLoessareatobuildsubwaytunnelisthefirstcaseinChina.Somanymonumentsmakethegroundsurfacesubsidencetheimpactonthesurroundingenvironmentduetotheshiel

3、dtunnelexcavationmeespeciallythereisimptantengineeringapplicationvaluetostudyit.Thispaperisbasedonthemetro2#linetunnelthroughthecitywallinacitywhichisbuiltbyshieldconstructionusethemannerofcombinetheeticalanalysisinsitum

4、onitingFLAC3DsimulationtostudythesurfacethecitywallfoundationsubsidencelawswherethesubwaytunnelisbuiltbyshieldconstructioninspecificLoessareassuggestedthematureshowtocontrolthedisttion.TheMainconsequentsareasfollow:(1)St

5、udiedthemainreasonsfailuremechanismofthegroundsurfacesubsidenceduetoshieldtunnelconstruction.Theresultsshowthatthemainreasonsaffectingthegroundsurfacesubsidenceduringtheshieldconstructionaregroundmovementfmationfmationch

6、angesoftheiginalstressstatethesoilconsolidationsecondaryconsolidation.Thegroundsurfacesubsidenceincludes5partsasbefetheshieldarrivedtheshieldarrivedtheshieldpassedtheshieldtailpassedfollowupsubsidence.(2)Analyzedthesurfa

7、cesubsidencedataobtainedTheresultshowsthattheKofPeckfmulachangedfrom0.44to0.50.SuggestedtheapplicableconditionshowtoapplyPeckfmulainLoessareatoestimatethegroundsurfacesubsidence.(3)Studiedtheprocessoftheshieldpassingthro

8、ughtheancientcitywallbydesigninganumericalmodelmethodwithFLAC3D.Suggestedthebestjointconstructionprogramwhichisfmedbysegmentsupptgroutingbehindthesegmentchemicalgroutinginthesoilwithin3citygatespilingbedpilesclosedtothea