Dynamic Monitoring and Finite Element Analysis of Slopes Reinforced with Pre-stressed Anchor Anti-slide Piles

摘要

This paper has analyzed the reinforcement effect of the pre-stressed anchor anti-slide piles by means of the local monitoring and FEM (finite element method), taking the K21 landslide of some Coastal Expressway as example. At first, the strained condition of reinforced slope was measured followed by the assessment on the reinforcement effect of the reinforced pre-stressed anchor anti-slide piles and further the stability of the slope. Next, the FEM of the reinforced pre-stressed anchor anti-slide piles has been established by ABAQUS, a general large finite element software, to analyze the stability of slope before and after reinforcement considering the strength reduction method. The result indicated that the effect of the reinforced pre-stressed anchor anti-slide piles is evident and the slope stability turned well compared to the pre-reinforcement. The case project has been in service for two years, which is of reference value for this kind case.This paper is based on the case of the K21 landslide of some Coastal Expressway, local monitoring and FEM(finite element method) are adopted in the analysis of the reinforcement effect of the reinforced pre-stressed anchor anti-slide piles. Firstly, through the analysis of monitoring data, the forced state of the reinforced pre-stressed anchor anti-slide piles can be investigated, and the reinforcement effect of the reinforced pre-stressed anchor anti-slide piles can be evaluated. So the slope stability status can be judged.And then,with the help of ABAQUS,strength reduction FEM(finite element method) is used to examine the stability of slope before and after reinforced with anti-slide piles. The results showed that: the reinforcement effect of the reinforced pre-stressed anchor anti-slide piles is obvious. After reinforcement,the state of slope turn from unstable into stable. This project can offer references for similar reinforcement projects,as it has been completed and is safety for two years.