The Research Of Highway Slope Stability Analysis Based On Fem And Comprehensive Protection Selection

Abstract:With the large-scale construction of road engineering in china, the slope instability problem get more and more in engineering. Due to construction requirement, it will destroy or disturbance the original stable soil slope of Highway to form a new slope in sometimes, Impact the construction and the surrounding environment, in severe case, may cause significant casualient and other losses. So, to analyis soil slope’s stability and its protection correctly is improtent in slope construction engineering.In order to analysis the stability of the Highway soil slope and select the protection program, this article has researched the stability of the Highway soil slope based on the finite element method and comprehensive protection selection. The main conents are as follows:Through a lot of data collection and field investigation, describesed the basic types of soli slope instability failure and the influence factors. Combined with the typical geological and climatic conditions of Fujian Province, summarized the common forms of slope damage in Fujian Province. Using the heterogeneous soil ae the research object, Based on the principle of gray relational analysis, Drawing a typical example of soil slope analysis, Establishing slope stability analysis model with the ABAQUS finite element software, Use finite element anailsis of etrength reduction method to analysis the sensitivity of the effect factors of the stability of soil slope and to compare and sort the factors’ correlation.6influence factors for the correlation order is:<(?)>c>w>γ>h>m, limited Angle of internal friction and effective force’s impaction on the instability is the most sensitive. At the same time, it also demonstrated the superiority of the finite element strength reduction in slope stability analysis sffectively.Through a lot of field investigation and data analysis, Elaborated the Highway slope’s common engineering support, vegetation protection and comprehensive protection mode of Fujian Province. Summarized the basic principle, characteristics, construction methods of the protection modes, has a certain reference value for the preferred solution subsequent slope.Combined with practical engineering, based on the stability anaiysis with the finite reduction method, combined with the supporting mode of Highway slope commonly used in Fujian Province, proposed4kinds of practial recommendations protection program. Through the comparative analysis between the related parameters of each scheme, using the AHP structure model of Highway slope support scheme selsction, using the Technical, Economic and Environmental impact as the selection indicators, Through expert group decision method to establish judgment matrix, using the Yaahp software to judgment matrix, weighed average the project level total sorting of the experts, getting the weight ranking of each project, in order to determine the optimal scheme of slope protection.