重庆市三峡库区丰都县白沙沱滑坡变形特征及稳定性分析

长江三峡库区地质环境复杂,是一个滑坡多发区域,滑坡的发生严重危及人民生命财产安全。通过对三峡库区丰都县白沙沱滑坡灾害勘查研究,阐述了该滑坡区的地形地貌、水文地质条件、各层岩土体结构特征及物质组成、变形特征、主要影响因素以及物理力学特征,考虑到三峡库区的蓄水影响,在不同工况下对滑坡体进行稳定性计算,并结合抗剪强度指标的敏感性分析,对该滑坡的稳定性进行分析及评价。结果表明在不同工况条件下该滑坡体不同剖面的稳定性存在潜在危害,甚至可能整体失稳破坏;同时,内摩擦角为滑坡稳定性的敏感因子,对滑坡的稳定性影响程度至关重要。这为滑坡防治与治理提供合理的设计依据,同时说明研究该滑坡的意义重大。

Deformation characteristics and stability analysis of Baishatuo Landslide in Fengdu County, Three Gorges Reservoir Region of the Yangtze River , Chongqing City, China

Due to the complexity of the geological environment of the Three Gorges Reservoir, it is a landslide-prone area, occurrence of landslide threatens people"s lives and property safety. Through the exploration of disaster investigation of Baishatuo Landslide in Fengdu County, Chongqing City, Three Gorges Reservoir Region of the Yangtze River, China, elaborates the topography of the landslide area, hydrogeological conditions, the layers of rock and soil structure and material composition, deformation characteristics, the main factors and the physical and mechanical characteristics. Taking into the impact from the impoundment of the Three Gorges Reservoir Region of the Yangtze River, calculates the stability of landslide in different conditions, the stability of the landslide is analyzed and evaluated integrating with sensitivity analysis of shearing strength index. The results indicate there is a potential hazard for the stability of different sections of the landslide under different working conditions, and the landslide may even undermine the overall instability. At the same time, internal friction angle, which is the sensitive factor of the landslide stability, is indispensable to the influencing degree of the landslide stability. It is designed to provide a reasonable basis for prediction and treatment of the landslide, this shows it is significant for us to investigate the landslide simultaneously.