三峡水库区江阳坪滑坡成因分析及稳定性评价

Analyse on the Landslide Causes and Stability Estimate in Jiangyangping Coast of Three Gorges Reservoir District

本文介绍了滑坡体、滑带、滑床的结构和物质组成及滑坡具多期次滑动的变形特征,认为滑坡区岩石破碎、滑坡前缘形成临空面、地表水渗入土体为滑坡的形成提供了有利的条件;长时间的持续暴雨、古夫河长期冲刷、人类工程活动是诱发滑坡发生的主要因素。并据岩土物理力学性质指标的试验结果以及滑坡稳定性反演分析计算结果,结合地区经验值,确定计算滑坡稳定性的抗剪强度指标,采用传递系数法,分不同的工况条件进行稳定性计算。根据计算结果对滑坡进行了稳定性评价,并结合工程实际提出一些可行的防治措施及建议。

It introduces the structure and material composition of the landslide, slip and sliding bed and the multi-phase slipping deformation characteristics of the landslide. Several causes made the favorable conditions for the formation of landslides, such as rock crusher in Landslide Area, the invading formation in the front of the landslides, surface water seeping into soil. The major factors that cause the landslide are prolonged continuous rainstorms, long-term erosion of Cardiff River and human engineering activities. According to the test results of the geotechnical physical and mechanical properties and the result of the indicators landslide stability inversion, with experience figure of that area, it determines the shear strength index of the stability of the landslide, and calculate stability under different working conditions with the transfer coefficient method. According to the calculated results it evaluates the stability of the landslide. Some possible preventive measures and recommendations are advised with combination of engineering reality.