基于FEM抗滑桩对土质和岩质边坡稳定性影响分析

Analysis of soil and rock slope stability influence by anti-slide piles position based on FEM

研究抗滑桩位置对土质和岩质边坡稳定性影响的差异,采用桩单元模拟抗滑桩方法和有限元法(FEM)分别对土质和岩质边坡进行抗滑桩加固模拟分析。结果表明:对于土质边坡,低位抗滑桩加固效果最好,稳定安全系数提高了20%,承受剪力和弯矩最大,边坡破坏时抗滑桩完好;对于岩质边坡,中位抗滑桩加固效果最好,稳定安全系数提高了165%,边坡破坏时抗滑桩剪断破坏,建议采用下沉埋桩,既能保证边坡稳定,又能减少33%的桩长。计算结果对类似边坡工程中抗滑桩的优化设计有一定的参考价值。

In order to study the difference of the influence of the position of anti-slide pile on the stability of soil and rock slope ,this paper introduced a kind of method of anti-slide pile simulation based on pile element,and the finite element method was use to analyze soil slope and rock slope of reinforcement of anti-slide pile. The results indicated that: for soil slope,the effect of low anti-slide pile reinforcement was the best,stable safety coefficient increased by 18%,and bear the largest shear force and bending moment,the anti-slide piles kept intact;for the rock slope,the effect of median anti-slide piles reinforcement was the best,stability safety coefficient was increased by 165%,and the anti-slide piles were damaged,suggested using sunken piles,which can not only guarantee the stability of slope,but also can reduce the pile length by 33%. The results could provide some reference for the anti-slide piles application optimization of similar slope engineering.