临近既有地铁隧道的软土基坑工程安全风险分析-豆柴文库

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临近既有地铁隧道的软土基坑工程安全风险分析
Title:SafetyRiskAnalysisofSoftSoilFoundationPitEngineeringAdjacenttoExistingSubwayTunnels
Abstract:
Theconstructionoffoundationpitsadjacenttoexistingsubwaytunnelsposessignificantsafetyrisksduetothepotentialimpactonthestabilityoftheundergroundinfrastructure.Thispaperaimstoanalyzethesafetyrisksassociatedwithsoftsoilfoundationpitengineeringnearsubwaytunnels.Throughacomprehensiveriskassessment,thisstudyidentifiespotentialhazardsandproposeseffectiveriskmanagementstrategiestoensurethesafetyandstabilityoftheproject.
1.Introduction
Theexpansionofurbanareasoftennecessitatestheconstructionoffoundationpitsnearexistingsubwaytunnels.However,theproximitytoundergroundinfrastructureintroducesarangeofsafetyrisks.Softsoilfoundationpitprojectsposeuniquechallengesduetothepotentialforgroundmovement,undergroundwaterflow,andtheimpactonthestabilityofsurroundingstructures.Understandingandeffectivelymanagingtheserisksarecrucialforthesuccessfulcompletionofsuchprojects.
2.RiskIdentification
Thissectionfocusesonidentifyingthesafetyrisksassociatedwithsoftsoilfoundationpitengineeringnearsubwaytunnels.Potentialhazardsinclude:
2.1.StabilityRisks
-Groundsubsidence:Theexcavationoffoundationpitscanleadtogroundsubsidence,potentiallycompromisingthestabilityoftheunderlyingsubwaytunnels.
-Differentialsettlement:Differentialsoilsettlementcancauseunevenstressdistributiononadjacentstructuresandleadtostructuraldamage.
-Soilliquefaction:Excavationactivitiesmayinduceliquefactionofsoftsoil,reducingitsload-bearingcapacityandcompromisingthestabilityofnearbytunnelsandstructures.
2.2.ConstructionRisks
-Excavation-inducedvibrations:Vibrationsgeneratedduringexcavationcantransmitthroughthegroundandpotentiallydamagetheexistingsubwaytunnels.
-Groundwaterseepage:Excavationcanchangethegroundwaterflowpattern,causingwaterseepageintothetunnelsandincreasingtheriskofsoilerosionandtunnelcollapse.
-Constructionaccidents:Thecomplexnatureoffoundationpitengineeringnearsubwaytunnelsincreasestheriskofaccidentsdur