锚杆与抗滑桩协同作用下的边坡稳定性研究

摘要

Reinforcements are needed in most cases for the instability of natural accumulated slopes and the leaded unsatisfaction for engineering demands.Based on the failure mechanism established in this paper,the stabilizing forces under given safety factors are obtained taking advantage of upper bound theorem and strength reduction technique.Based on the works above,changing rules of quantity and pullout force of bolts,pile position and equivalent force distribution forms of pile on stabilizing force are analyzed for construction guidance.Numerical simulation is conducted at the same time for the verifi﹣cation of the effectiveness of slope reinforcement in Shao﹣ping highway.%自然状态下边坡稳定性较差，滑塌失稳时常发生，常需要进行加固处理。因此，通过构建二级边坡滑塌失稳模式，运用极限分析上限法与强度折减技术推导了给定安全系数条件下的抗滑桩侧有效抗力表达式。并探究了锚杆分布形式、抗滑桩位置及桩身抗力分布模式对桩侧有效抗力的影响规律。研究结果对边坡的设计和施工具有一定的借鉴意义。最后，采用数值模拟方法对邵坪高速边坡加固方法的有效性进行了对比验证。