Study on Stability Design and Reinforcement of Slopes in Water Conservancy Projects
水利工程边坡稳定性设计与加固研究

摘要

本文选择新疆阿勒泰地区福海县境内运行20年的一处深挖方高边坡作为研究对象，在对该边坡由于马道开裂、局部塌陷、渗水等问题所造成的变形失稳进行分析的基础上，结合现场踏勘、地质勘探、室内试验等相关资料，详细阐述边坡的变形失稳原因及其诱因。结论认为，导致该边坡变形的因素主要有特殊的地质构造、岩石遇水膨胀特性、不良的地下水环境以及开挖卸载共同作用的结果。通过对极限平衡法以及反演方法的应用求得边坡的安全系数以及滑动面抗剪强度指标：内摩擦角φ=14.57°，粘聚力c=6.83kPa。在此基础上提出采用“排水井＋抗滑桩”的组合型整体加固措施。

Abstract

This paper takes as the research object a deep-cut high slope that has been in operation for 20 years in Fuhai County, Altay Prefecture, Xinjiang. Based on an analysis of deformation and instability caused by problems such as cracking of berms, local collapse, and seepage, and in combination with field investigation, geological exploration, indoor testing, and other relevant data, the paper elaborates in detail on the causes and inducing factors of slope deformation and instability. The results indicate that the deformation of the slope is mainly the result of the combined effects of special geological structures, the water-induced swelling characteristics of rocks, an unfavorable groundwater environment, and excavation unloading. By applying the limit equilibrium method and inverse analysis, the safety factor of the slope and the shear strength parameters of the sliding surface were obtained, with an internal friction angle of φ = 14.57° and a cohesion of c = 6.83 kPa. On this basis, a combined overall reinforcement measure consisting of “drainage wells + anti-slide piles” is proposed.