煤系地层路基边坡锚索抗滑桩加固作用机理分析研究

摘要

由现场监测试验可知,煤系地层路基开挖后该边坡处于滑动状态,应用极限平衡原理建立平衡方程,反演了主滑动面的内摩擦角φ和粘聚力C,由此确定了锚索抗滑桩的支护加固方案,进行了平面布置与结构计算分析.采用有限元法对纯桩和锚桩加固方案进行了对比,加锚索后无论是桩的水平变形,还是桩内应力均得到了改善.%As is known from monitoring in-situ, the newly-cut slope is sliding in coal-bearing strata. According to limit equilibrium principal of slope, a back analysis has been made to determine the cohesive factor C and internal friction angle φ of pre-existing potential instable discontinuities. Based on the C and φ determined above, pre-forced cable and anti-slipping pile scheme was adopted. Consequently, plane layout and structure design of pre-forced cable and anti-slipping pile have been made. The FEM is adopted in comparison for the schemes of pre-forced cable and anti-slipping pile and anti-slipping pile. Both horizontal deformation of pile or piles stress are improved after installation of anchor cable.