civilfem Tunnel Excavation Analysis.ppt

1,TunnelExcavationAnalysis,,,2,ANSYSCivilFEMteamuptosimulatetheexcavationprocessandobtaintheforcesandstressesactingontheconcretearch,soilandanchorages.,TunnelExcavationAnalysis,CourtesyofGeoconsultEspaa,3,TunnelExcavationAnalysis,4,Thegraphshownbelowwasobtainedafterrunningafiniteelementanalysisoftheexcavationmodel.,Forcesactingonthesheetpileatendofexcavationphase,TunnelExcavationAnalysis,5,TunnelExcavationAnalysis,6,TunnelExcavationAnalysis,FactorofsafetywithregardstoPlasticity,,InverseofFactorofSafety1Plasticity,,LiningandReinforcement,7,TunnelExcavationAnalysis,ANSYSmeshingcapabilitiesallowtocombinesimultaneouslyautomaticanduserdefinedmeshes,whichtranslateintogoodsimulationofthemodel’srealbehavior.,,ModelGeometry,,Completemodel,Detail,8,,Stressesonconcretearchduringthedifferentconstructionphases,TunnelExcavationAnalysis,,ConcreteLining,PrincipalStressS1,9,TunnelExcavationAnalysis,Forcesactingonprojectedconcrete,,Phase2ConcreteReinforcement,ForcesandmomentsonShortcreet,,Bendingmoment,,AxialForce,,ShearForce,10,,Principaldirectionsandplasticdeation,TunnelExcavationAnalysis,,Phase2SoilReinforcement,,PrincipalStressesPlasticDeation,11,Conclusions,ANSYSCivilFEMtoolsallowcarryingoutsophisticatedandpreciseanalysistosimulateexcavationphases.Postprocessingofresults,areautomaticallycarriedoutforsolid,beamandshellelements.TunnelreinforcementiscalculatedandcheckedbycodeautomaticallywithCivilFEM.Advancedanalysisleadstocostsavingsandtimeofworking.Parametricanalysisallowschangingmaterialpropertiesandconstructionprocesseasily.,,