Ansys Of Stability On Changing Of Water Level And Rain Of Sanmashan Landslide

This article takes Sanmashan landslide as a background,Has analyzed Sanmashan area engineering geology characteristic,and has analyzed Sanmashan landslide engineering geology characteristic.Under considering landslide area complex water environmental condition,by Favoring the landslide thrust force computation theory,get the calculations under each kind of operating mode the landslide stability coefficient,then find what the most prime factor is.The Sanmashan landslide lies the Sanmahan area of new city of Fengjie,where is located to a complicated environment of water,including:①The water level will get to 175m;②The water level will be controlled under the different season and needing,afer the dam is finished;③The water level will be changed between 145m and 175m,it will effect the changing of groundwater directly;④rain.Under the complicated of water envionment,the stability of landslide will be effected directly.(1)rain.①The water the part enter the landslide will form a high level in some places,it will form a stress of static and moving,and saturate the rock and soil,raises the gliding ability.②Rain forms superficial power,then reduces the resistance;③Rain softens the rock and soil,it is vigorous for gliding of Sanmashan landslide.(2)Fluctuate of reservoir′water level.The influence of fluctuate of reservoir′water level are analysed from power,time and composition of Sanmashan landslide.Under complex water environmental conditions,by considering the pore-water pressure,Hydrodynamic pressure action of force,rain and earthquake,and by Unifying Sanxia dam reservoir movement way,Carry on the combinations to the landslide load,get 7 conditions,and Using landslide thrust force computation theory,comput the stability analyses separately to sevenkind of operating modes,Obtain under each kind of operating mode the landslide stability coefficient.Ought to thestability coefficient,get the most disadvantageous landslide stable operating mode,so the conclusion is:water level's plummeting causes the most disadvantage factor which the landslide produces;it does not affect the landslide stability by rising he water level.