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土压平衡盾构机密封舱土压力控制研究
Title:ResearchonSealedChamberSoilPressureControlinEarthPressureBalanceShieldTunnelingMachine
Abstract:
Thepropercontrolofsoilpressureduringtunnelingoperationsiscrucialtoensurethestabilityandsafetyofundergroundstructures.Thisresearchaimstoinvestigatethecontrolofsoilpressurewithinthesealedchamberofanearthpressurebalance(EPB)shieldtunnelingmachine.Thestudyfocusesonunderstandingthefactorsinfluencingsoilpressureandproposingeffectivemeasurestooptimizethesoilpressurecontrol.
1.Introduction
1.1Background
Tunnelingoperationsareessentialfortheconstructionofundergroundinfrastructures.TheEPBshieldtunnelingmachinehasbeenwidelyusedduetoitsabilitytoexcavateinsoftgroundconditions.OnecriticalaspectofEPBtunnelingismaintainingpropersoilpressureinthesealedchamberduringexcavationtopreventgroundsettlementandpotentialstructuraldamage.
2.LiteratureReview
2.1SoilPressureinEPBShieldTunneling
Thissectionprovidesanoverviewofthefactorsthatinfluencesoilpressureinthesealedchamber,includingsoilproperties,excavationparameters,andtheinteractionbetweenthetunnelliningandthesoil.Italsodiscussestheexistingmethodsandtechniquesusedtocontrolsoilpressureandtheirlimitations.
3.Methodology
3.1ExperimentalSetup
Thisstudyadoptsacombinationofexperimentalandnumericalanalysismethods.Ascaled-downmodelofanEPBshieldtunnelingmachinewillbeusedtosimulatetheexcavationprocess.Soilpressuresensorswillbeinstalledinthesealedchambertomeasurethevariationsinsoilpressureduringtunneling.
3.2NumericalModeling
Numericalmodelingusingfiniteelementanalysiswillbeconductedtosimulatetheinteractionbetweenthetunnelingmachine,thesoil,andthetunnellining.Differentscenarioswillbesimulated,consideringvariationsinsoilproperties,excavationsequences,andotherrelevantparameters.Themodelingresultswillbecomparedwithexperimentaldatatovalidatethenumericalmodelingapproach.
4.ResultsandDiscussion
4.1ExperimentalResults
Themeasuredsoilpressuredataduringtheexcavationprocesswillbeanalyzedtounderstandthetrendsandvariations.Theinfluenceofdiffe