Upper Bound Analysis Of Stability Analysis For Soil-slope And Rock-slope

With the rapid economic development of our country, domestic infrastructure has also developed rapidly in recent years.The mileage of highway and high-speed railway has been a great extension.At the same time, when the construction of the road in some mountainous areas, slope engineering will occur inevitably. Keeping stability of the slope is not only the emphasis of the slope engineering, but also the fundamental of a running-line.The different material between soil-slope and rock-slope leads to different failure mechanism. Both the soil-slope and rock-slope have two two structural forms,which are single-stage slope and two-stage slopes. Based on different failure criteria,this paper discuss limit analysis of slope stability and mainly do the following work:1. Based on plasticity limit analysis by upper bound theory and non-linear failure criterion, the paper has studied stability of soil slope under normal loads, stability of soil slope under seismic loads, stability of rock slope under seismic loads,and derived solving formulas of the critical height in connection with a variety of soil conditions.At the same time,some guidance advice about construction has been put forward.2.With the help of Matlab optimization algorithm,this paper has composed program,which can be used to solve the critical height. By calculated the critical height of slope under different parameters, this paper analyzes the influence of various parameters on the critical height. By contrast to calculation results of existing methods, it shows that the method in this paper is correct.3. On the basis of single-stage slope, this paper further discussed and analyzed stability of two-stage slope composed of roil under normal loads, stability of two-stage slope composed of roil under seismic loads, t stability of two-stage slope composed of rock under seismic loads. Simultaneously,this paper derived the formulas of critical height and safety factor calculation.