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                          Studyontheinfluenceofdouble - slopeslidingsurfacefoundationonthe
                                      failuremodeofcementedsandandgraveldam

                                                   1
                                                                 1,2
                                         DINGZelin,XUEJianghan ,WANGJing        1
                    (1.SchoolofWaterConservancy,NorthChinaUniversityofWaterResourcesandElectricPower,Zhengzhou 450046,China;
                              2.CollegeofWaterResourcesandHydropower,SichuanUniversity,Chengdu 610065,China)

                  Abstract:Inordertoexploretheinfluenceofcomplexfoundationonthesafetyandstabilityofcementedsandand
                  graveldam (CSGdam),three - dimensionalgeomechanicalmodeltestswerecarriedoutforCSGdamonhomogene
                  ousfoundation ,fractureddouble - slopeslidingsurfacefoundationandfullydevelopeddouble - slopeslidingsurface
                  foundation.Byanalyzingthedeformationcharacteristicsofthedam bodyanddam foundation ,thefailureprocess
                  andfailuremodeofthemodelintheexperiment ,thecontrollingfactorsaffectingthesafetyandstabilityofdam
                  bodyareexplored.Theresultsshowthat :(1)theoverloadsafetyfactorK p ofhomogeneousfoundationmodel,
                  fractureddouble - slopeslidingsurfacefoundationmodelandfullydevelopeddouble - slopeslidingsurfacefoundation
                  modelare6.0 ,6.4and6.8,respectively.(2)Thefailuremodeofthemodelhasagreatrelationshipwiththein
                  tegrityofthefoundation.Thefailuremodeofthedambodyiscausedbythethroughcrackalongthedamfoundation
                  surface ,andgraduallydevelopsintotheslidingchannelslidinginthefoundation,formingtheslidingflipfailureof
                  thedamheelfallingandthedamtoelifting.(3)ThestabilityofCSGdamisdeterminedbytheanti - slidingstabili
                  tyofstructuralplaneincomplexfoundation.AftertheCSG dam isaffectedbythedouble - slopeslidingsurface
                  foundation ,theoverloadsafetyfactorofeachmodelgraduallydecreaseswiththedevelopmentofthefoundation,
                  whichseriouslyaffectsthesafetyoftheproject.Itisnecessarytoavoidthedangerousfaultsthatmayformthepo
                  tentialslidingsurfacewhenselectingthedamsite.Thetestresultscanprovidereferenceforthesubsequentdevel
                  opment ,designandconstructionofCSGdam.
                  Keywords:cementedsandandgraveldam;double - slopeslidingsurfacefoundation;geomechanicalmodeltest;
                  slipfailure

                                                                                    (责任编辑:韩 昆)

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