Research On Optimization Of Slope Reinforced By Anti-Slide Pile With Pre-stressed Anchor Cable

As a new type of slope governance structure, Anti-slide pile with pre-stressed anchor cable is used in actual engineering more and more widely, but the study on it is relatively late, the related theoretical research is far behind the engineering practice. So based on the previous research work, this paper based on slope governance of National highway 111 He Fang Kou- Tang He Kou section reconstruction project, mainly by means of numerical simulation, with the aid of finite element analysis software ABAQUS, launched on stability analysis of Anti-slide pile with pre-stressed anchor cable reinforce slope and the research on related parameters optimization. The main research results are as follows:(1) Summarized the domestic and foreign research of anti-slide pile with pre-stressed anchor reinforced slope optimization design theory, experiment and research status, focus on the development and present situation of its strengthening mechanism;(2) Using ABAQUS to simulate the stability of slope in three working conditions as natural, heavy rain and earthquake. The results show that the slope in natural state is in a stable condition, but in heavy rain and earthquake conditions are in unstable conditions and require reinforcement. The results are consistent with the results of Geo – Studio.(3) Selected pile location, pile spacing, pile length, pile section size of anti-slide pile and anchor length, anchor cable angle, prestressed value of pre-stressed anchor cable as the optimization parameters, through numerical simulation and analysis of the results, obtained the influence law of how reinforcement effect changes by above parameters change, and determined the optimum values of the parameters above;(4) According to the results of numerical simulation, combined with the engineering practice, determined the optimal anti-slide pile with pre-stressed anchor cable project for the design of slope reinforcement. Conducted a preliminary design according to the specification requirements and made Numerical simulation analysis to it. The results show that under the effect of anti-slide pile with pre-stressed anchor reinforcement, the plastic zone is not connected, the slope displacement is limited, and the slope is in a stable state.