Page 178 - 《水资源与水工程学报》2023年第3期
P. 178

!34 " ! 3 #                       & ' ( ) & * + , -                               Vol.34No.3
               2023 $ 6 %               JournalofWaterResources&WaterEngineering                 Jun.,2023

            DOI:10.11705/j.issn.1672-643X.2023.03.22


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                 ABCDE:TU43   FGHIJ:A    FKLE:1672643X(2023)03017410

                 Slidingdepthandvolumeanalysisofnonstationaryrandom fieldslopes
                            consideringdepthdependentsoilstrengthparameters

                                                          1
                                               1
                                                                     2
                                                                                     2
                                   ZENGYong,LIYajun,YANJun,TIANZhenhua
                     (1.SchoolofEngineeringandTechnology,ChinaUniversityofGeosciences(Beijing),Beijing100083,China;
                             2.ChinaInstituteofWaterResourcesandHydropowerResearch,Beijing100048,China)
                 Abstract:Basedontherandomfiniteelementmethod(RFEM)andMonte-Carlosimulations,anon
                 stationaryrandomfieldmodelisestablishedforthesimulationofslopeswithdepthdependentsoilstrength
                 parametersorslopeswithweakinterlayers.Themostlikelyfailuresurfaceisobtainedbytheradiation
                 scanningmethod ,andtheslidingdepthandvolumeofthenonstationaryrandomfieldslopearesimula
                 ted.Thentheslidingdepthandvolumeobtainedbythismethodarecomparedwiththoseofthehomoge
                 neousslopeandthestationaryrandomfieldslope ,soastostudytheinfluenceofthenonstationaryran
                 domfieldslopewiththedepthdependentsoilstrengthparametersontheslidingdepthandvolumeunder
                 differentslopeanglesandanisotropyconditions.Theresultsindicatethatthestudyofnonstationaryran
                 domfieldslidingdepthandvolumebasedonRFEMprovidesareferentialanalysisangleforthegeological
                 hazardriskandconsequenceevaluation.Thehigherthedepthdependenceoftheparameter (thegreater
                 thechangerate b),theslowertheaverageslidingdepthandvolumeoftheslopegraduallydecreases.In
                 theprocessofevaluatingtheriskconsequencesofalargeslopelandslide ,apreliminaryestimationcanbe
                 madebasedontheresultsofthehomogeneousslopeanalysis.Inanonstationaryrandomfield ,asthean
                 isotropyincreases ,thevariationcoefficientoftheslidingvolumeatallanglesincrease.Underdifferent
                 slopeangles,thegreaterthecorrelationofthesoilslopeinthehorizontaldirection,thegreatertheuncer

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