Stability Analysis And Optimal Design Of The High Embankment On Steep Slopes Based On Elastic-Plastic Finite Element Method

The high embankment on steep slopes that have built took place in varying degrees of damage. We should find the damage reasons and stability correctly of the high embankment on steep slopes, and take appropriate measures to reinforce the high embankment on steep slopes that have damaged, It is valuable to ensure the mountain roads function is normally.People research for the analysis method of slope stability from qualitative method to quantitative method, at present the limit equilibrium method and finite element method of qualitative method is used frequently. The author built the finite element models using ANSYS software in my article. And assayed the slope angle , the step width ,characteristic of embankment filler and foundation strength how to influence the high embankment on steep slopes stability in specific model by Drucker-Prager elastic-plastic model, also the author summarized the rules of deformation.Relying on the intercommunication grade separation's circuit engineering on a street in Zigong city, the author assayed the stability about the high embankment on steep slopes containing soft soil in selected section of the project examples. Also the author got the result, namely the high embankment was instability when the filling height is greater than one meters. If we wanted to fill the embankment continuatively, we must to take appropriate reinforce method. In article the author brought forward two strengthening program, namely Anti-pressure beam reinforce method and Dry-vibrated gravel column. And the author assayed this two strengthening program using ANSYS software.First, the author found that the Anti-pressure beam reinforce method was ineffective after assaying, the finite element analysis of the results did not converge, so the author give up this program. Second, the high embankment can keep stability when the foundation strength of the district using dry-vibrated gravel column for strengthening meet the requirements, Then the author brought forward a design of the dry-vibrated gravel column based on the results of the finite element analysis, also the author authenticated the design caught meet the requirements. Finally the author summarized the design process and reinforcement method of the high embankment on steep slopes, such as the embankment slopes protection ,the digging step, the drainage method ,the retaining wall, the lattice anchor, the reinforced retaining wall, the reinforced steep slope, the anti-slide pile, the brush side losing weight and filling pressure foot, the grouting reinforcement. The author assayed the reinforcement effect of the step for the high embankment on steep slopes.