Study On Reinforcement Mechanism And Influencing Factors Of Anti-slide Pile With Pre-stressed Anchor Cable

Due to have the prominent advantages of reasonable structure,good economic efficiency and large sliding resistance,the anti-slide pile with pre-stressed anchor cable is more and more used in the large-scale slope engineering projects such as railway,highway,water conservancy and hydropower.As a new and complex support structure,its related theoretical research is far behind its engineering application,especially in the structure of load transfer behavior,pile-soil interaction and the interaction mechanism of pile and anchor.Based on the previous research results,the mechanism of load transfer of anti-slide pile with pre-stressed anchor cable is numerically simulated by using discrete element software in order to gain a deep understanding of its mechanism of reinforcement.The main contents are as follows:(1)Particle flow numerical simulation of horizontal soil arching effect of anti-slide pile.With the aid of particle flow software PFC,the particle flow model of anti-slide pile and post-pile landslide soil is established from the point of view of pile-soil interaction,and the development,formation and stabilization of horizontal soil arching effect are monitored to reveal its load transfer.(2)Simulation Study on the effect of pre-stress on the pile-soil interaction.The particle flow model of vertical cross-section pile-soil interaction was established to monitor the micro-parameters of pile-soil interaction and the internal force of pile after applying pre-stressed.The load transfer mechanism of post-pile soil under pre-stress was analyzed to explore the effect of pre-stress on pile-soil interaction.According to the engineering design example,the main influencing factors such as soil particle parameters,porosity and friction coefficient were changed,and different numerical models were established to analyze the influence of different factors on the load transfer of the anti-pile with pre-stressed anchor cable.(3)Analysis of influencing factors of soil arching effect.