雅砻江中游左岸斜坡地质灾害发育特征及形成机制分析——以九龙县烟袋乡为例

Development Characteristics and Genetic Mechanism of Slope Geohazards on the Left Bank of the Middle Yalong River——By the Example of Yandai Township,Jiulong County

九龙县烟袋乡不稳定斜坡位于雅砻江左岸,地质环境脆弱,发育灾害有危岩体、坡面危石、崩塌堆积体等,斜坡坡脚有12户50人居住,前缘有县道通过,该不稳定斜坡发生灾害,威胁当地居民生命财产安全,很可能堵塞雅砻江,威胁上游锦屏二级水电站。本文通过详细的野外调查、工程地质测绘、室内试验和山地工程,对不稳定斜坡的形态、发育特征进行了剖析,研究了灾害形成机制,供雅砻江左岸类似斜坡评价参考。

The unstable slope in Yandai Township,Jiulong County lies on the left bank of the Yalong River and is characterized by fragile geological environment and development of dangerous rock mass,slope dangerous rock,collapse accumulation body.There are 12 households and 50 people living at the foot of the slope and the leading edge of the slope is traversed by a county road.It threatens the lives and property of local people and the flow of the Yalong River.It is a threat to Jinping-Ⅱ Hydropower Station in the Upper Yalong River,too.This paper makes an approach to shape,development characteristics and genetic mechanism of available slope geohazard which can be used as a reference for the evaluation of similar slopes on the left bank of the Yalong River.