四川宁南县坪子山滑坡发育特征及稳定性分析

新村乡坪子山滑坡位于四川省宁南县新村乡。该滑坡2011年开始滑动,每年均有小幅度下滑。滑坡的存在威胁着下方村民的安全。在野外调查的基础上,对该滑坡的地质环境条件、变形破坏特征、演化过程和破坏机制等进行了初步分析。同时,采用FLAC~(3D)软件模拟并结合强度折减法对该滑坡进行了稳定性模拟。结果表明:滑坡目前的主要变形区为中后部,尚未形成贯穿性滑面。但应重视在强降雨、地震等诱发因素作用下,滑坡滑面的贯通及其产生的失稳。

Development characteristics and stability analysis of Pingzishan landslide in Ningnan country

Pingzishan landslide is located in Xincun town of Ningnan County in Sichuan Province. The landslide began to slide in 2011, with small deformation every year. The existence of landslide threats the safety of the villagers. Based on the survey on site , the geological conditions, deformation and failure characteristics, evolution process and failure mechanism of the landslide are preliminarily analyzed. At the same time, the stability of the landslide is simulated by FLAC3D software using the strength reduction method. The results show that: the main deformation zone of the landslide in the rear. The landslide has not yet formed through surface at this moment. However, pay attention to the through surface and the instability of the landslide triggered by heavy rainfall and earthquake.