Slope Excavation and Parameter Sensitivity Analysis Based on Grey Correlation Method

With the unceasing construction and development of highway, there are a large number of being forming excavation slopes which will due to the hazard of instability. Aimed at a highway roadside slope of Yiba in Hubei province, analyzed the stability under slope excavation scheme, and put forward a measure of prestressed anchor-bolt to control effectively. From the angle of displacement and stress analysis, pointed out the key position that played a leading role in slope stability. Meanwhile, considered sensitivity factors of slope stability coefficient, analyzed the change rule of slope stability and four main impact factors which were the cohesive force c, internal friction angle phi, unit weight gamma and gradient alpha by use of grey correlation analysis method. The results reveal sensitivity contribution rate of stability which is due to influence parameters, and it is of certain significance to the slope safety and protective treatment.