Optimal Design and Numerical Analysis of Soil Slope Reinforcement by a New Developed Polymer Micro Anti-slide Pile

Abstract

As a new material, polyurethane polymer has been widely used in engineering in recent years due to the excellent engineering mechanical properties. Based on the characteristics of this material, a multi pipe grouting micro anti-slide pile is proposed, which is formed by using polymer slurry as grouting material. Compared with traditional anti-slide pile, the polymer micro pile has the advantages of strong applicability, no water reaction, small disturbance, fast construction, economy and durability. As a flexible retaining structure, polymer micro-piles can strengthen the slope by cooperating with the forces. However, there is no report on the reinforcement of slope by polymer micro piles at present. In this paper, a three-dimensional multi row polymer micro piles model for slope reinforcement considering different embedded depth and pile location is established. Safety factor, thrust force of landslide behind pile, length of pile and mises stress are taken as four factors to evaluate reinforcement effect, the optimal reliability of polymer micro anti-slide pile for slope reinforcement is evaluated by giving different weight values to each factor through multi factor comprehensive evaluation method. The safety factor of slope (Fs), landslide thrust behind pile and mises stress of pile are analyzed under different embedded depth (le) and pile position (px). The results show that the best embedded depth is about1/8 − 1/12 of the horizontal length of the landslide behind the pile when multi row polymer micro piles are used to reinforce the slope; the optimum position of pile arrangement is 0.55–0.65 times the slope length from the top of the slope.

Double-Row Pile Reinforcing on a Critical Slope at National Road in Tabanan, Bali

“…However, it has been discovered that the proper position and configuration for pile optimization are essential for the most effective reinforcement influence. The slope may slide along its failure plane if the piles in the failure plane are not correctly adjusted [12][13][14][15].…”

Fracture Disaster Assessment of Model Concrete Piles in Loess Slope Engineering under Non-Uniform Lateral Loading

“…Liu et al [17] developed a theoretical model to enhance riverbank slope stability by optimizing geogrid and pile reinforcements. Other scholars have investigated the impacts of pile reinforcement on slope stability and seismic performance through numerical simulations, offering practical criteria and recommendations for engineering applications [18][19][20]. Chen et al [21] analyzed the acceleration response and internal force dynamics within a pile anchor framework, providing suggestions for load sharing in practice.…”