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浅埋富水软弱围岩隧道支护受力特征及方案研究 Title:StudyontheStressCharacteristicsandSupportSchemeofShallow-buriedWater-richSoftWeakRockTunnel Abstract: Inrecentyears,withtherapiddevelopmentofinfrastructureconstruction,theconstructionofshallow-buriedtunnelshasbecomeincreasinglycommon.However,thepresenceofwater-richsoftweakrockasthesurroundingrockoftunnelsposessignificantchallengestotheirstabilityandsafety.Thispaperaimstoinvestigatethestresscharacteristicsandproposesuitablesupportschemesfortunnelsinsuchgeotechnicalconditions. 1.Introduction: 1.1Background: Shallow-buriedtunnelsareusuallyexposedtowater-richsoftweakrock,whichcanresultindeformation,instability,andpotentialfailure.Thus,understandingthestresscharacteristicsofthesurroundingrocksiscrucialfordesigningeffectivesupportschemes. 1.2Objectives: Thisstudyaimstoanalyzethestressdistributionandmechanicalbehaviorofshallow-buriedwater-richsoftweakrocktunnelsandproposeappropriatesupportschemestoensuretheirstabilityandsafety. 2.AnalysisofStressCharacteristics: 2.1GeologicalInvestigations: Detailedgeologicalinvestigationsincludingin-situtesting,laboratorytesting,andgeologicalmappingareconductedtounderstandthephysicalandmechanicalpropertiesofthesurroundingrocks. 2.2StressDistribution: Thestressdistributioninthesurroundingrockisanalyzedusingnumericalmodelingtechniques,consideringtheeffectsofoverburdenpressure,porewaterpressure,androckproperties.Thestressconcentrationzonesandpotentialfailureplanesareidentified. 2.3DeformationCharacteristics: Thedeformationcharacteristicsofwater-richsoftweakrocks,suchasstrain-softeningbehavior,creep,andswelling,areanalyzedbasedonlaboratoryandin-situtesting.Theinfluenceofthesedeformationcharacteristicsontunnelstabilityisconsidered. 3.SupportSchemeDesign: 3.1ReinforcementMeasures: Variousreinforcementmeasures,suchasshotcrete,boltanchoring,andgrouting,areproposedtoenhancethestrengthandstabilityofwater-richsoftweakrocks.Theselectionanddesignofreinforcementmeasuresarebasedonthestressdistributionanalysisanddeformationcha