盾构施工与邻近管线渗漏耦合作用下地层沉降及管线变形规律研究

盾构施工与邻近管线渗漏耦合作用下地层沉降及管线变形规律研究盾构施工与邻近管线渗漏耦合作用下地层沉降及管线变形规律研究

摘要：

随着城市化的不断推进，地下管线的布局日益复杂，管线施工与运行难免会受到地下工程的干扰。其中又以盾构施工会对邻近管线造成较大影响，而管线渗漏又会加剧地层沉降现象，从而进一步影响管线的使用质量。本文以城市地铁工程实例为研究对象，对盾构施工与邻近管线渗漏耦合作用下的地层沉降及管线变形规律进行探究。

本文首先介绍了地下管线对城市发展的重要性、盾构施工对邻近管线的影响及管线渗漏对地层沉降的影响。然后，以某城市地铁工程实际情况为例，结合现场监测数据，分析了盾构施工对邻近管线的应力分布和沉降变形的影响，同时也分析了管线渗漏对地层沉降情况的加剧。最后本文得出，盾构施工与邻近管线渗漏耦合作用下，地下管线的变形多为弯曲形变，且沉降深度明显加剧，对管线的使用安全造成了较大威胁。

关键词：盾构施工；邻近管线；渗漏；地层沉降；管线变形。

Abstract：

Withthecontinuousadvancementofurbanization,thelayoutofundergroundpipelinesisbecomingmoreandmorecomplex,andpipelineconstructionandoperationwillinevitablybeaffectedbyundergroundengineering.Amongthem,shieldtunnelingwillhaveagreatimpactonnearbypipelines,andpipelineleakagewillexacerbatethephenomenonofgroundsubsidence,therebyfurtheraffectingthequalityofpipelineuse.Thisarticletakesurbansubwayengineeringasaresearchobjecttoexplorethelawofgroundsubsidenceandpipelinedeformationunderthecouplingeffectofshieldtunnelingandnearbypipelineleakage.

Thisarticlefirstintroducestheimportanceofundergroundpipelinestourbandevelopment,theimpactofshieldtunnelingonnearbypipelines,andtheimpactofpipelineleakageongroundsubsidence.Then,takingtheactualsituationofacertaincitysubwayprojectasanexample,combinedwithfieldmonitoringdata,analyzedtheinfluenceofshieldtunnelingonthestressdistributionandsettlementdeformationofnearbypipelines,andanalyzedtheexacerbationofgroundsubsidencecausedbypipelineleakage.Finally,thisarticleconcludesthatunderthecouplingeffectofshieldtunnelingandnearbypipelineleakage,thedeformationofundergroundpipelinesismostlybendingdeformation,andthedepthofsubsidenceissignificantlyincreased,whichposesagreatthreattothesafetyofpipelineuse.

Keywords:shieldtunneling;nearbypipeline;leakage;groundsubsidence;pipelinedeformationWiththedevelopmentofurbanization,theconstructionofundergroundpipelineshasbecomemoreandmoreprevalent.Shieldtunnelingisacommonlyusedmethodintheconstructionofundergroundpipelines,whichinvolvesdiggingatunnelundergroundusingaspecializedmachine.Althoughitisahighlyefficientandsafemethod,itcancausedamagetonearbypipelines,resultinginleakageandgroundsubsidence.

Whenshieldtunnelingiscarriedoutnearexistingpipelines,thepotentialforinterferenceanddamageishigh.Themechanicalvibrationproducedbythetunnelingprocesscancausedamagetonearbypipelines,leadingtoleaks.Moreover,theexcavationcancausesoildeformation,makingthesurroundingsoilmorefragileandpronetocollapse.Whenthishappens,itcancausegroundsubsidence,whichcanhaveasignificantimpactonthestabilityoftheundergroundpipelines.

Thedeformationofpipelinesduetogroundsubsidenceismostlybendingdeformation,whichcanleadtostressconcentrationandstructuraldamage.Thedepthofsubsidenceisanimportantfactorthataffectsthedegreeofdeformationofpipelines.Thedeeperthesubsidence,thegreaterthebendingdeformationofthepipeline.Ifthedeformationreachesacriticalpoint,thepipelinemaybreak,whichcanresultinsevereconsequences.

Tomitigatetheriskofpipelinedamageduringshieldtunneling,itisnecessarytotakeappropriatemeasures.Forexample,pipelineownersshouldbenotifiedinadvanceofanyconstructionactivitiestoenablethemtotakepreventivemeasures.Additionally,engineeringmeasuressuchaspipelinereinforcementcanbetakentoreducetheriskofpipelinedamageduringconstruction.

Inconclusion,thecouplingeffectofshieldtunnelingandnearbypipelineleakagecanresultinsignificantgroundsubsidence,whichposesaconsiderablethreattopipelinesafety.Tominimizethisrisk,itisessentialtocarryoutthoroughassessmentsoftheimpactofshieldtunnelingonnearbypipelinesandtakeappropriatemeasurestopreventpipelinedamageAdditionally,itisimperativetoconductregularinspectionsandmaintenanceofpipelinestoensuretheircontinuedsafetyandpreventanypotentialleaksorstructuraldamage.Thismayinvolveusingadvancedtechnologiessuchassensornetworkstomonitortheintegrityofpipelinesorimplementingpreventativemeasuressuchascathodicprotectiontopreventcorrosion.

Moreover,itisvitaltoimprovecommunicationandcoordinationbetweentunnelingandpipelineconstructionteamstomitigatetherisksofadverseeffectsfromshieldtunneling.Thiscouldinvolveestablishingajointriskassessmentandmanagementsystemordevelopingprotocolsforsharinginformationonexcavationplans,progress,andpotentialissues.

Furthermore,itisessentialtoenhancepublicawarenessofpipelinesafetyandthepotentialrisksassociatedwithshieldtunneling.Thiscouldinvolveimplementingeducationalprogramsorcampaignstoeducatethepublicontheimportanceofpipelinesafetyandthepossibleimpactsoftunnelingontheircommunities.

Insummary,shieldtunnelingcanposesignificantriskstonearbypipelines,leadingtogroundsubsidenceandpotentiallycompromisingpipelinesafety.Tominimizetheserisks,itiscrucialtoconductthoroughriskassessments,implementpreventativemeasures,improvecommunicationandcoordinationbetweenconstructionteams,andpromotepublicawarenessofpipelinesafety.Bytakingthesesteps,wecanensurethecontinuedsafeoperationofourpipelineinfrastructureandprotectthehealthandwell-beingofourcommunitiesFurthermore,itisimportanttocontinueinvestinginadvancementsinpipelinetechnology,suchaspipelinemonitoringsystemsandleakdetectiondevices,tofurtherimprovepipelinesafety.Regularinspectionsandmaintenanceofpipelinescanalsohelppreventanddetectanypotentialleaksorissuesbeforetheybecomeasafetyhazard.

Inadditiontophysicalsafetyhazards,pipelinescanalsohaveenvironmentalimpacts.Spillsandleakscanleadtosoilandwatercontamination,whichcanharmlocalecosystemsandwildlife.Therefore,itisimperativethatpipelineoperatorshaveeffectivespillresponseplansinplace,aswellasworktopreventspillsfromoccurringinthefirstplacethroughstrongsafetymeasuresandregularmaintenance.

Lastly,itisimportantforpipelineoperatorstoengagewithandeducatenearbycommunitiesabouttheimportanceofpipelinesafety.Thiscanincludepublicoutreachprograms,communityme