厦沙高速公路云母石英片岩边坡稳定性评价及加固效果分析

Evaluation of Stability and Analysis on Reinforcement Effect of Mica Quartz Schist Slope of Xiamen—Shaxian County Expressway

通过对厦沙高速公路ZK113+630^+805边坡工程地质特征分析,确定可能的破坏方式,通过Sarma法进行稳定性验算,得到潜在滑动面位置,决定采用锚索加固方案。运用软件3DEC对比分析施加锚索前后的边坡,结果表明,若采用锚索加固,边坡应力分布会得到改善,水平向位移明显减小,坡脚塑性区减少,稳定性会提高,加固效果明显。

According to the analysis on geological characteristics of ZK113 ＋ 630 - ＋ 805 slope engineering of Xiamen Shaxian County expressway, possible failure mode of this slope is determined. Based on the slope stability analysis using Sarma method, potential sliding surface position is obtained and the anchor reinforcement scheme is adopted. By using 3DEC discrete element simulation, the stability of slope under the condition of applying anchor cable and without anchor cable is compared and analyzed. Research shows that if the anchor reinforcement is adopted, slope stress distribution will be improved, the horizontal displacement will decrease obviously, plastic zones at slope toe will reduce, the stability will be improved and the reinforcement effect is obvious.