Study On Stability Of The Camel Mountain Landslide Under The Running Of The Jishi Gorge Reservoir

After Jishi Gorge Reservoir which is in the upper reaches of the Yellow River storage,Reservoir banks distribution of many ancient landslides,because of reservoir storage,reservoir banks of the original dry conditions of the rock mass is submerged below the water level,the sharp fluctuation of dry and wet period of the reservoir water level will change the hydrology of the reservoir banks original-geological environment,The area Landslide resurrection instability is one of the major geological problems faced in the Northwest China Plateau reservoir area construction.In this paper rely on the Yellow River Jishixia hydropower station reservoir bank slope slope stability of research projects,According to the" the Yellow River Jishi Gorge Hydropower Station Reservoir Bank Slope Stability Study of" scientific research as the basis,Study on the the Yellow River reservoir bank the landslide stability of the camel ridge.Through the landslide site investigation and data collection and analysis,the limit equilibrium method and strength reduction method based on the FLAC3D software,the reservoir operation under different states of camel ridge slope stability calculation and comparative analysis,the main research results are as follows:(1)the Jishi Gorge Reservoir area according to the engineering geological condition,slope shape,from material composition and geological structure feature proceed with,Analysis the camel ridge landslide formation mechanism,development process and failure mode-slip-tensile failure mode;(2)the camel ridge landslide of rock physical and mechanical properties are analyzed with reference to the Yellow River,upstream of the other landslide engineering geological properties and local experience data,the landslide soil rock and soil shear strength parameters are reasonably selected,for the landslide stability calculation and analysis provide a basis;(3)the Jishi Gorge Reservoir area according to the special geological environment,establish the change of reservoir water level slope under the condition of calculation model,and by using FISH language according to the different conditions of groundwater infiltration of surface modeling,and on water,underwater rock soil parameter assignment,to resolve the FLAC3D calculation for complex model for arc infiltrates surface modeling and geotechnical parameter assignment problem;(4)through to the camel ridge landslide stability calculation and analysis indicate that:in the rising of reservoir water level from 1852m to 1860.4m,the stability of the landslide with the rise of water level and reduce;and when the water level drawdown,landslide stability decrease degree than library level rises extent is relatively large,this is because when the water level drops,slide in vivo water gradient increase induced by;According to the different water level conditions camel ridge landslide stability on the analysis:the change of the water level on the stability of the landslide has certain effect.Jishi Gorge reservoir water level fluctuation in1852m?1860.4m between,the ancient landslide is a resurrection to produce overall slip may,should strengthen pair of its displacement monitoring,when necessary to take appropriate protection measures,avoid disaster.