四川南江县三百钱沟危岩体特征及稳定性分析

The Sanbaiqian’gou Unstable Rock Mass and Its Stability in Nanjiang, Sichuan

三百钱沟危岩区位于县城内南江河左岸三百钱沟沟口附近,是南江县危岩崩塌地质灾害高发地带,目前三百钱沟危岩区在长约1500m范围内主要发育有13个危岩体。坠落式、倾倒式和滑移式三种类型为区内危岩的主要失稳破坏方式。本文通过危岩体稳定性进行定量计算,结合危岩体崩坏机制,提出采用主被动相结合的综合工程措施对三百钱沟的危岩体进行针对性治理。

The Sanbaiqian'gou unstable rock mass area is located near the Sanbaiqian Gulley mouth on the left bank of the Nanjiang River in Nanjiang County. The unstable rock mass area is a high-risk area of unstable rock mass collapse in Nanjiang County. The unstable rock mass area is composed of 13 unstable rock masses, with a length of about 1500 m. Falling, dumping and sliding failures are three main destabilizing patterns of the unstable rock masses. Comprehensive control measure based on quantitative calculation of stability of the unstable rock masses in combination with mechanism of collapse of the unstable rock masses is put forward.