泸定某水电站厂房后边坡稳定性评价

Slope stability evaluation of a hydropower plant at Luding

随着大渡河流域水力资源的开发,其一级支流湾东河上的三级水电工程也相继开建,水电站的建设必将影响河道两侧的谷坡稳定性。湾东河某水电站厂址区的建设就处于其河畔一Ⅱ级阶地上。厂址后边坡在多种内外营力的作用下,特别是厂区的建设对边坡前缘的开挖,会对厂区后边坡的稳定性产生很大的影响。通过对厂区后边坡的工程地质条件的研究,同时采用规范中推荐的不平衡传力系数法,对其稳定性从定性和定量两个方面进行评价。得出本边坡在暴雨与地震的情况下稳定性欠佳,并就此提出治理建议,给工程实践带来积极的意义。

Along with the development of Dadu River Basin water resources, the III level hydropower project on the I level tributary of Wandong River has been started to construct. The construction of the hydropower station will have great influence on the slope stability of both sides of the river valley. One of the construction sites on Wandong river＇s hydropower station construction is in the II riverside terrace. Under a variety of internal and external main forces, especially the excavation on the front of the slope for plant construction,the slope＇s stability will be greatly influenced. According to the research of the slope＇s engineering geology condition,and using unbalanced transmission coef- ficient method recommended by standard, the author evaluates the slope＇s stability at the qualita- tive and quantitative aspects. The result is that the slope＇s stability is poor in the heavy rain and earthquake condition. Thus the author provides suggestions and some governments to solve this problem, which will provide active significance to the actual construction.