Study On Slope Stability Of The Highway In The Jishi Gorge Reservoir Area

In Jishi gorge reservoir area,the geological environment is complex.With the poor water level of Jishi gorge hydropower station reaches the design depth,the slope instability problems of the highway in Jishi reservoir area emerge more,which will damage the highway and cause economic losses,and even cause casualties.Therefore,it is very important to evaluate slope stability of the highway in Jishi gorge reservoir area.There are many factors which affect slope stability,and some of them are not only difficult to determine but also difficult to make quantitative estimation.But until now,it has not yet formed its own evaluation system.Therefore,establishing the evaluation system of slope stability of the highway will not only play an important role in the safety operation of the built highways,but also have direct reference value for highway construction in the Jishi reservoir area and in the similar geological environment and the design of highway disaster prevention.Basing on the scientific subject" Study on Slope Stability of the Highway in the Yellow River Jishi Gorge Hydropower Station Reservoir Area",this dissertation makes the study on slope stability of the highway in the Jishi gorge reservoir area in order to seek a perfect and applicable evaluation system and analysis method.Firstly,collect,read and analyze the research data at home and abroad,and the theories and methods which are used for evaluating slope stability were studied.Secondly,Starting with the actual types of deformation failure of slope,the deformation failure characteristics and formation mechanism of Jishi gorge reservoir slope is discussed;according to the field survey results in the Jishi gorge area and related research results,summary the main factors which affect the slope stability of the highway,mainly including landform,geological conditions,reservoir water effect,meteorology and hydrology,vegetation effect and human engineering activities influence.Thirdly,the bank slope is considered separately including rock slope and soil bank.The impact on rock slope stability factors is summarized as geological environmental conditions and predisposing conditions.Select eight major factors as evaluation factors,including the angle of slope,relative elevation,rock type,geological structure,the average annual rainfall,role of reservoir water,seismic intensity and human activities.The impact on soil bank stability factors is summarized as geological environmental conditions and predisposing conditions too.Select ten major factors as evaluation factors,including the angle of slope,relative elevation,severe,cohesion and internal friction angle,vegetation coverage,the average annual rainfall,role of reservoir water,seismic intensity and human activities.Establish the evaluation model of slope stability of the highway based on fuzzy analytic hierarchy process.Then,taking Qingguan highway reconstruction engineering as an example,the slope stability of it was evaluated and verified,and the feasibility was analyzed the defects were summarized.Finally,program composition to solve the problem of matrix calculation in order to improve the efficiency of evaluation.