Sensitivity Analysis Of Stability And Influencing Factors Of Bedding Rock Slope Mountains

With the rapid development of national economy,highway construction in mountainous area has been vigorously carried out in china.the instability and failure of the rock slope of highway in mountainous area cannot be ignored.Compared with the general bedding rock slope,the bedding rock slope with weak structural plane is more prone to failure,which poses a great threat to the safety of people’s life and property.Therefore,it is of great practical significance to analyze and study the stability of bedding rock slope and the sensitivity of influencing factors.In this paper,the bedding rock slope as the research object,using the finite element strength reduction method,limit equilibrium method,sensitivity analysis of the single factor method,multi-factor analysis to study the stability of bedding slope,factor sensitivity and other aspects,the main research results obtained are:（1）The deformation and failure modes of bedding rock slope are summarized and the factors affecting the stability of bedding rock slope are deeply analyzed.It can be concluded that the failure of slope is a dynamic process,the failure modes of the slope are different in different deformation stages,and there are many types of failure in the same rock slope.The main factors affecting the stability of bedding rock slope are external factors and internal factors.The weak structural plane in rock mass and the construction disturbance to the slope will have a great influence on the rock slope.（2）Based on the engineering example,The establishment of bedding rock slope geological and calculation model,using the FLAC^3D,based on the strength of subtraction of bedding rock slope in different slope heights h,slope angle a,strata dip β,structural plane spacing d,layer under the condition of cohesive force c,internal friction angleφof stability and slope displacement,stress distribution rule is studied,the bedding rock slope under different influence factors of deformation and failure of stability coefficient variation law.（3）Through the comparative analysis of single factor analysis,range analysis and variance analysis of the main factors affecting the stability of bedding rock slope,it is shown that the calculation results of the three sensitivity analysis methods are basically the same,and the following conclusions can be drawn:The friction Angle in rock and soil has the greatest influence on bedding rock slope,the second is the side slope height,cohesion,groundwater.Among the three methods,the variance analysis methods has the largest coefficient of variation,so the analysis effect is the most advantageous.（4）Using FLAC^3Dsoftware,the slope of a bedding open pit mine in hubei province is numerically simulated,its stability is analyzed,it can be concluded that when the two groups of weak structural planes are exposed on the slope surface,it is easy to form the formation of the forming zone,and the failure will occur along the soft structural plane,The disaster prevention and mitigation measures for slope stability in this area are also put forwad.