孔隙水压力对抗滑桩加固边坡稳定性影响分析

Influence analysis of pore water pressure on slope stability strengthened by anti-slide pile

抗滑桩具有施工方便和加固效果能力优良等优点,在边坡治理中应用最多。当采用抗滑桩来加固边坡时,在工程实际中普遍根据极限平衡法对边坡的稳定性进行分析,该方法得到的结果仅是近似解,因此,本文采用极限分析上限方法同抗剪强度折减技术相结合,研究了在孔隙水压力下边坡采用抗滑桩加固时的极限平衡状态方程,并对抗滑桩桩侧有效土压力进行了求解,将孔隙水压力视为外力荷载做功,通过虚功方程来体现。并以工程实例为基础,对边坡进行变动参数计算与对比分析,验证了该方法的合理性。

Anti-slide pile has the advantages of convenient construction and good reinforcement effect and is widely used in slope management.When anti-slide pile is used to reinforce slope,the stability of slope is generally analyzed by limit equilibrium method in engineering practice,and the results obtained by this method are only approximate solutions.In this paper,the upper limit analysis method and shear strength reduction technology are used to study the limit equilibrium state equation of slope reinforcement with anti-slide pile under pore water pressure,and the effective earth pressure on the side of anti-slide pile is solved.The pore water pressure is regarded as external load to do work,and is reflected by the virtual work equation.Based on an engineering example,the variation parameters of slope are calculated and compared,and the rationality of this method is verified.