Page 185 - 《水资源与水工程学报》2024年第5期
P. 185
!35 "!5 # & ' ( ) & * + , - Vol.35No.5
2024 $ 10 % JournalofWaterResources&WaterEngineering Oct.,2024
DOI:10.11705/j.issn.1672-643X.2024.05.22
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MNOPQ:TV554;U25 RSTUV:A RWXQ:1672643X(2024)05018110
Characteristicsofseepage-stresscouplinginmine-shielddocking
sectionofhighspeedrailwaysubseatunnel
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JINGYifeng,WANGBo,MEIJie ,LIUJinwei,MENGQingyu 3
(1.KeyLaboratoryofTransportationTunnelEngineering,MinistryofEducation,SouthwestJiaotongUniversity,Chengdu
610031,China;2.InstituteofUrbanRailTransportation,SouthwestJiaotongUniversity,Chengdu611756,China;
3.ChinaRailwayDesignCorporation,Tianjin300308,China)
Abstract:Underwaterdockingconstructionbymineandshieldmethodisakeytechnicalissueinthe
constructionofsubseatunnels ,andunderstandingtheseepage-stresscouplingcharacteristicsisthe
premiseofsafeconstructionandoperationofthedockingsectionoftunnels.Thisstudyemployedafinite
elementsoftwaretocarryoutthreedimensionalnumericalsimulationofonsitedockingconstruction
scheme.Basedonthesimulationresults ,theseepagecharacteristics,displacementdeformationand
stresschangerulesofdifferentconstructionsectionsofthetunnelwereanalyzed,whichrevealedtheseep
age-stresscouplingmechanism oftheconstructionofthetunnelmine-shielddockingsectiononthe
surroundingrockdisturbance.Theresultsshowthataftertunnelexcavation ,theporewaterinthesur
roundingrockpoolsandcontinuouslyrechargestothetunnelcaveperimeterandtheexcavationsurface ,
resultinginareductionofporewaterpressure,theformationofprecipitationfunnels,anincreaseinthe
seepageratearoundthetunnelcaveperimeter ,andalargeamountofwaterinfluxduringtheexcavation
stage.Affectedbythehydraulicgradient ,theporewaterpressureatthebottomofthearchisthelargest,
butsettingupdrainagemeasurescanleadanddrainthepressureduringconstruction.Duringtunnelex
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