不同变位模式下刚性挡土墙土压力极限分析

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1、AbstractaccordingwiththeLimitPrinciples.Inordertodecreasethegapbetweenthedynamicsolutionandstaticsolutionandfindthelogicaltotheveracioussolution,theauthortrytosolvetheearthprogressandtheultimatebearingcapacityoffoundationsoilbythesameslidingsurface.Inordertoverifythefeasibilityofthismethod

2、,theresultsofthemodelinthispaperwillbecomparedwiththerigorousresults,andthencomparedwithresultsofanapproximatecalculationmodelorapproximatecalculationformulawhichismatureinapplications.Andtheresultsoftheearthpressureofthewallinthemodelareslightlylessthantheresultsofthetightwhichbelongstoth

3、eUpperlimitsolution,meetingthelimitanalysisprinciple,andthelocationoftheslidingsurfaceareingoodagreementwiththetight,it’sshowthatthewaycouldgivetheveraciousnesspositionoftheslidingsurface.Theapproximatelywayissimplerthantherigorousway.Theconceptislegible.Thegapbetweendynamicsolutionsandsta

4、ticsolutionsissmaller;it’sshowthatthewayofdesigningmodelisright.Itreachestheaimofdecreasingthegapbetweenthedynamicsolutionandstaticsolution.Comparedwiththeapproximatecalculationofthemodel,themodelinthispapercanobtainmoreexactstaticsolutions,sotheconclusionisthattheapproximatesolutionprecis

5、ionislower.TheapproximatesolutiondividestheearthintoseveralsimpleRankineactivesectionorpassivesectionbyseveralaclinicdiscontinuouslines.Theactiveearthprogressishigherandthepassiveearthprogressislower.Butthewaytosolvethedynamicsolutionismoreprecise,theresultisneartothispaper’sresult.It’spro

6、vesthewayofthispaperisright.Intheaspectoftheultimatebearingcapacityoffoundationsoil,ithasimprovedtheaccuracyofthestaticsolutions,andthecalculatedresultsareingoodagreementwithapproximateformulacomparedwiththetightresultandthematureapproximatecalculationformula.Sothemodelisprovedtobefeasibil

7、ity.Theapproximateslidingsurfaceisneartotheresultofrigorousresultswhenthewaytakestheearthpitintocount.Thereforethismodelcanreducethegapbetweendynamicandstaticsolutionsandgetamoreprecisedeterminationoftheshapeandlocationoftheslidingsurfaceunderdifferentdisplace