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考虑渗流应力耦合的地基变形分析(英文).docx

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考虑渗流应力耦合的地基变形分析(英文) Introduction: Withtherapiddevelopmentofinfrastructure,theproblemoffoundationdeformationhasbecomeincreasinglyprominent.Asoneofthekeyfactorsaffectingthestabilityoffoundation,theseepageflowinthesoilcancausechangesintheporepressureinsidethesoilandthestress-strainrelationshipofthesoil,whichinturnaffectsthedeformationofthefoundation.Therefore,itisofgreatsignificancetostudytheinfluenceofseepageflowonthedeformationoffoundationandinvestigatethemechanismofseepageflow-stresscoupling. Mechanismofseepageflow-stresscoupling: Intheprocessofseepageflowinthesoil,theinertialforceofthefluidandtheresistanceofthesoilgenerateacouplingeffectwiththestressinthesoil.ThemathematicalmodelofseepageflowandstresscouplingismainlybasedonDarcy'slawandsolid-liquidtwo-phasecouplingtheorytodescribetheseepageflowstateandstressstateofthesoilrespectively.Inthismodel,theporefluidpressureisregardedasaparametertodescribethestress-strainrelationship,whichmeansthatthechangeofporefluidpressurecausedbyseepageflowwillaffectthedeformationofthesoil. Analyticalmethodofseepageflow-stresscoupling: Thetraditionalanalyticalmethodsforstudyingseepageflow-stresscouplingmainlyincludenumericalsimulationandlaboratorytests.Numericalsimulationmethods,suchasFEMandBEM,cansimulatetheseepageflow-stressfieldofsoilunderdifferentconditionsandobtainaccurateresults.However,duetothecomplexityofthesoilmassstructureandthedifficultyoftheparametermeasurement,itisdifficulttoobtainaccuratesimulationresults.Incontrast,laboratorytestscanobtainmoreaccurateexperimentalresultsunderthecontrolofdifferentparameters,buttheexperimentalconditionsandtheactualworkingconditionsvarysignificantly. Applicationofseepageflow-stresscouplinganalysisinfoundationdeformation: Theseepageflow-stresscouplinganalysishasbeenwidelyusedinthestudyoffoundationdeformation,especiallyinthepredictionandcontrolofthedeformationbehaviorofundergroundengineeringsuchastunnels,deepexcavations,anddams.Forexample,inthecaseofdeepexcavations,duetotheinfluenceofseepageflo