某高边坡失稳机制分析及加固处理

Instability Mechanism Analysis and Reinforcement Treatment of Certain High Slope

为了解四川广元某工程的边坡失稳破坏机制,调查了工程区的地质条件、地层岩性、水文地质特征,总结分析了该边坡失稳的原因是由于强降雨引起边坡地下水水位及水压力急剧上升,增加了边坡的不稳定性,并因为施工开挖切脚且未及时支护,导致边坡前缘临空,从而形成一个牵引式滑坡.再选取典型剖面对失稳后的边坡采用传递系数法、极限平衡法进行稳定性分析计算,结果表明边坡处于欠稳定、不稳定状态,并结合计算结果对边坡采取抗滑桩、坡面格构锚索等加固措施.

In order to understand the causes of the buckling failure of a slope of a certain project in Guangyuan,Sichuan,the researchers studied the geological conditions,formation lithology,hydrogeological characteristics of the area and then analyzed and summarized the main cause of slope instability. The heavy rainfall enhanced the groundwater level and water pressure of the slope dramatically which increased the instability of the slope. Then,the excavation caused a cut foot area at the slope,which further led to a freeing surface at the front of the slope,so finally a retrogressive landslide was formed. In the end,the researchers selected typical cross sections for stability analysis of the instable slope. Based on the calculation results,the corresponding reinforcement countermeasures were taken.