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考虑土拱效应的RB模式挡墙主动土压力研究.docx

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考虑土拱效应的RB模式挡墙主动土压力研究 Title:StudyonActiveEarthPressureofRBWallConsideringEarthArchingEffect Abstract: Theactiveearthpressureexertedonretainingwallsisacriticalfactorintheirdesignandstabilityanalysis.Thetraditionaltheoriesofearthpressureallowfortheanalysisofsoil-wallinteractionsundercertainassumptions.However,thesetheoriesoftenneglecttheeffectofsoilarching,whichcansignificantlyinfluencethemagnitudeanddistributionoftheactiveearthpressure.Thispaperaimstoinvestigatetheactiveearthpressureofreinforcedconcreteblock(RB)walls,consideringtheeartharchingeffect. 1.Introduction Retainingwallsareusedtoprovidestabilityandsupporttoverticalornearlyverticalsoilslopes.Theestimationofactiveearthpressuresactingonthesewallsisfundamentalindesigningstructuresthatcanresistthelateralloadsimposedbytheretainedsoil.Thetraditionaltheories,suchasRankineandCoulomb,havebeenwidelyusedtoestimatetheactiveearthpressure.However,theydonotconsiderthesoilarchingeffect,whichcanresultinunderestimatingtheactuallateralpressuresandpotentiallycompromisingthestabilityofthewall. 2.EarthArchingEffect Thesoilarchingeffectreferstotheredistributionoflateralearthpressuresduetotheequilibriumofsoilparticleswhenaloadisappliedontheretainingwall.Thisphenomenoncanresultinadecreaseinthemagnitudeofactiveearthpressurecomparedtowhatwouldbeexpectedbasedontraditionaltheories.Moreover,thedistributionoftheearthpressuresonthewallcanbecomenon-uniform,leadingtolocallyconcentratedforces. 3.RBWallDesignandConstruction RBwalls,consistingofinterlockingconcreteblockswithreinforcement,havebecomeapopularchoiceforretainingwallsduetotheireaseofinstallationandcost-effectiveness.TheRBwallsrelyontheinteractionbetweentheblocksandthesoilmassbehindtoprovidestability.UnderstandingtheactiveearthpressuresonRBwallsiscrucialfortheirdesign,ensuringthattheycanwithstandtheimposedloads. 4.FactorsInfluencingActiveEarthPressure SeveralfactorsinfluencetheactiveearthpressureexertedonRBwalls,includingwallgeometry,soilproperties,surchargeloadings,andgroundwatercondit