Stability And Engineering Influence Research On3#Landslide On The Right Bank Of The Yellow River For Cihaxia Hydroelectric Power Station

Cihaxia hydropower station which is the proposed level of hydropower station,the damfor the panel set type (heart wall) rockfill dam located in the Watts gorge canyon inHainazhou of qinghai province of the Yellow River.The no.3landslide Among them lies in theright bank of the Yellow River,in a gorge hydropower station, the dam upstream straightdistance of700m position.After a field geological prospecting, the no.3landslide is in astable state when it is in natural conditions landslide.I have qualitative and quantitativeevaluation of the landslide which is under the condition of instability in heavy rains,earthquake and the river a fluctuation etc which will happen.Whether can cause damage toDAMS and affect gorge reservoir, watts normal operations evaluation if or not which Basedon the landslide in the river into decline, and the resulting waves of the reservoir and landslidedeposition. Therefore, it has an important theoretical significance for studying the water levelfluctuation of library under the condition of the landslide stability and an importantengineering significance for building Cihaxia hydropower station which studys the no.3ofthe development of the landslide characteristics, deformation and failure mechanism andrational forecast of the damage.Systematic analysis, research and study the development features, cause mechanism, thestability condition, the waves of reservoir area and the deposition of the reservoir area of theright bank of no.3landslide which follows the guiding ideology of analysis of geologicalprocess mechanism and quantitative evaluation. Made the following main achievements.（1）Through collecting the regional geological environment material in the interior and thefield geological survey and exploration work,find out the deformation and failure of thelandslide characteristics and genetic mechanism.After investigation,the Right bank number3landslide is the result of surface rock mass deformation of the destruction of song collapsehappening.After the study,the formation conditions of the number3landslide are connectedwith the geological environmental conditions:topography;stratigraphic lithology;rock massstructure;the structure of the slope geological conditions;ground stress;seismic dynamicinfluence.（2）Through the development of laboratory test,get the physical index of landslide slide soilin the natural state.And the shear strength under the condition of different moisture.provide animportant parameters for calculating the overall stability of landslide.（3） Through the geological history analysis method and the Limit equilibrium method,Analyzes the landslide in stability conditions before the reservoir water.After theanalyzing,eventually got the stability of landslide before the water storage in the naturalcondition,the storm conditions,and the earthquake condition,and the results respectively arestability、basic stability and owe stability.The influence factors of the future stability oflandslide are the rain and earthquake caused by human activity of the reservoir water levelfluctuation.（4）Through numerical calculation，under the conditions of the water level fluctuationoutgoing，the featuresof Slope stability factors sensitivity。Based on geological prototype，using the geological process mechanism analysis、limit equilibrium calculation、The finiteelement combining numerical simulation method，study the process of slide body of seepagesystem during the reservoir water and evaluate for forecasting the infiltration line changinginfluence stability of landslide.（5）Using the theoretical formula calculation method, Calculated the biggest waves and thefinal height of deposition party under the landslide stability condition.And evaluate theinfluence of hydropower project.The estimation results which waves get, in the storage levelto2800m,Local slope instability in into the water from the points of the biggest waves heightabout9.9m.The waves to the dam site,height of the following has attenuation to4.0m。Thereis little effect to the dam site on the building.That estimate the number3landslide localinstability into the biggest river body deposition of party is about45x104m3.The volume ofthe deposition limited the processing agricultural products,having the weak influence to theeffective capacity.So there is small threatening to the dam, underground workshop and otherhub architecture.