陈村水库坝址附近的岸坡稳定性研究

陈村水库坝址附近的库岸，自水库建成后曾发生过多次岸坡破坏。导致岸坡破坏的内在原因是不利的岸坡结构；外界因素是本区域梅雨季节时的大量降水的激发。根据滑坡体的结构特点，反岸坡的破坏方式分成四种类型：平面滑动前沿剪出型，溃曲破坏型，楔槽形破坏型，滑塌破坏型，以利于人们正确认识不同类型岸坡破坏的特点和规律。根据滑坡发生与雨量关系的统计规律，认为引发大量滑坡活动的梅雨期雨量阈值为６００￣６５０ｍｍ。通过模糊

The Study on the Slope Stability Near the Dam of ChenCun Reservoir

Since ChenCun dam was build, there have occurred some landslides near the dam, which do influence its security. What contribute to these landslides are such geological factors as faults, tension joints and bedding joints, and heavy rainfall during the rainy season. According to the structure of the landslides, they are divided into four types: slip\|shear slide, burst slide, wedge slide and slump slide. After studying the relation of the precipitation during the rainy season and the number of landslides of every year (from 1982 to 1996), the author finds the majority of the landslides occurred in these rainy seasons when the precipitation is more than 600 mm or 650 mm. In order to assess the stability of the slopes near the Dam, some mathematical ways are used to calculate the general value of the slopes, which shows the stability of the slope. Based on the value, the slopes are divided into three types: the full\|stable, the partly\|stable and the non\|stable. From these stated above, it can be known when and where the landslides would most probably take place, and then some measures would be taken in time to protect the slopes.