Stability Analysis Of High Rock Slope In Expressway Reconstruction

During the Highway reconstruction process,the projects of high cutting slope stability directly affect the splicing type.Based on the results of several field dynamics tracking,laboratory study,numerical calculation and model simulation analysis,this paper analyzes the rock mass of the Songming(Xiaopu)to Kunming(wulong)Expressway expansion project.Through the more systematic study of high slope excavation process,this paper obtains the following research results:1.Using the fractal theory to different types of Xiao Long lines across the region division,and the fractal dimension of the high slope spatial distribution shows the complexity of the slope development and the degree of slope progress in the whole high slope space of the region.Sums up the ruleis that the larger the fractal dimension,the more complex the spatial distribution of the high slope in this area,vice versa.2.Take the Xiao Long line section of the slope of the largest expansion of the expansion of the road section of the rock slope as a typical high slope of the route,the site survey sampling,and on-site rock samples for indoor testing.Some samples were carried out in natural state and saturated state for uniaxial or triaxial experiment to get the basic rock mechanics parameters.According to the geological survey data and the test results,the RMR value of the rock is obtained,and the Hoek-Brown criterion is used to calculate the mechanical parameters of the engineering application.3.Toanalyze the typical high slope excavation process stability,The excavation is divided into four operating conditions.The results show that the original support structure plays an anti-slip effect on the sliding surface during the excavation process,and the construction of the new support structure has great influence on the slope stability.Old support and new support combination will play the role of anti-skid protection to the maximum,rational use of the original structure,to improve the slope of the overall stability of the excavation process.4.The results show that the second-class slope support is effective to the stability of the slope.The results show that the slope stability of the slope is the same as that of the slope,and the anchorage angle and anchorage angle are analyzed.Improve the maximum,the more close to the foot of the foot,supporting the construction of the construction,the greater the increase in safety factor.The safety factor is proportional to the angle of anchorage,but after the optimal anchorage angle is reached,the safety factor is proportional to the anchorage angle,and the safety factor is larger than that of the anchorage angle.The safety factor does not increase.Therefore,rational design of the bolt,saving construction costs,to ensure the quality of construction is essential.