PARAMETRIC ANALYSIS ON FACTORS INFLUENCING STABILITY OF SLOPES REINFORCED BY ANTI-SLIDE PILES
ZHU Yong1, ZHU Honghu1,2,3, ZHANG Wei1, SHI Bin1
1. School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023;
2. Key Lab of Highway Construction & Maintenance Technology in Loess Region, Ministry of Transport, PRC, Shanxi Transportation Research Institute, Taiyuan 030006;
3. Shanxi Key Laboratory of Highway Construction & Maintenance Technology in Loess Region, Shanxi Transportation Research Institute, Taiyuan 030006
The use of anti-slide pile to reinforce the slope is a common method for landslide control. This paper considers the performance of a homogeneous isotropic slope reinforced with one row of piles. The strength reduction finite element method is used to analyze the effect of anti-slide pile reinforcement of several factors on the slope stability. It calculates the anti-slide pile bending moment, shear force, displacement and safety factor of the slope under the process of slope grading load. The results reveal the influence of pile position, pile length and other factors on the stability of slope. For each of these parameters, the safety factor of the slope, the optimal pile position and the critical length measure of the pile are assessed. The results provide reference basis for optimizing design of the pile row. Furthermore, the body stress and deformation characteristics of pile and laws under the grading loading are analyzed. It finds that the horizontal displacement of pile head under the step loading with exponential function forms of development. It then puts forward the deformation prediction mathematical model to provide basis for the deformation control of pile.