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通过现场钻探揭示了凤滩电厂近坝库岸永顺镇溪边坡的地层岩性,确定了滑裂面(带),并对地形地貌特征进行了分析.根据这些工程地质条件,确定了其沿破碎带滑动的破坏模式.通过对室内岩石力学试验数据的工程处理结果、现场推剪试验结果及滑坡反分析结果,得出了边坡破碎带岩体抗剪强度综合取值为:粘聚力Cm=28.6kPa,内摩擦角φ=29.4°.取3个代表性剖面采用Sarma法对其进行稳定性分析,分析时考虑了水和地震力的影响.计算了各种工况的安全系数,根据求得的安全系数对永顺镇溪边坡进行了评价,并对其综合治理提出一些建议.
Through on-site drilling, the stratigraphic lithology of the stream slope in Yongshun Town near Fengba power plant bank was revealed, and the slip surface (belt) was determined and the topographic and geomorphic features were analyzed. According to these engineering geological conditions, Along the crushing zone sliding failure mode.By the indoor rock mechanics test data of the engineering treatment results, the scene of shear test results and landslide back analysis results obtained slope shear zone rock mass shear strength integrated value as: cohesion Force Cm = 28.6kPa and internal friction angle φ = 29.4 °. Sarma method was used to analyze the stability of three representative sections, and the influence of water and seismic force was considered. The safety factor , According to the obtained safety factor to evaluate the slope of Yongshun Town Creek and put forward some suggestions for its comprehensive management.