杨家岭1~#滑坡稳定性影响因素及敏感性分析

杨家岭滑坡区地质条件复杂 ,且严重影响了 2 0 9国道的正常使用 ,本文研究了影响该滑坡稳定性的各类因素及滑坡稳态对这些因素的敏感性问题。研究表明 ,滑坡的稳定性受多种因素影响 ,主要包括滑坡岩土体容重、滑带的c、φ值、滑体的c、φ值、滑坡内地下水的动态和地震作用等等 ,其中滑带的抗剪强度指标c、φ值、地下水作用和地震作用是滑坡稳态的最敏感因素 ,甚至成为诱发因素。文中还通过研究滑坡坡面加固力的大小、方位与稳定系数的关系 ,确立了滑坡整治方案的最佳加固角 ,为滑坡的综合防治提供了可靠依据

FACTORS FOR INSTABILITY OF THE LANDSLIDE NO.1 IN YANGJIALING AND THEIR SENSITIVITY ANALYSIS

The geological conditions of the Yangjialing landslide are complicated, and it has seriously affected the national highway. This paper presents various factors that influence the landslide stability followed with their respective sensitivity analysis. Results indicate that many factors affect landslide stability, including the gravity density of the rock-soil, values of c and φ of the slipband, values of c and φ of the slide-body, the dynamic of groundwater in the landslide body, earthquake activities and others. Among them, the anti-shearing strength indices (c、φ ) of the slipband, groundwater and earthquake activities are the most sensitive factors, which may trigger the landslide. At the end, an optimum reinforce azimuth is established for landslide control based on the relationship between the stability coefficient, the reinforce force and the azimuth of the slope surface, which provides a guideline for the integrated control of the landslide.