云南古水电站巨型堆积体堵江预测研究及数值稳定性分析

我国西南大多水电站库区存在大量巨型堆积体,而周围复杂的地质条件加上环境营力的作用,易导致变形堆积体失稳下滑引起堵江事件。在综合前人研究大量滑坡堵江事件成果的基础上,首先建立较为切实的地质模型;然后利用数值模拟方法,推演堆积体的历史演化过程;并说明前缘发生堵江事件的可能性。结合堵江条件,分别采用滑距推算法和经验公式法计算同一条件模式下的堵江高度。结果表明两种方法预测同一失稳模式的堵江高度差距不大;因此可认为预测结果具有较好的可信度。以此初步建立了针对堆积体下滑堵江预测的研究思路,为此类问题的分析提供参考。

Prediction research of large-scale accumulation damming in Yunnan hydropower station and numerical numerical stability analysis

Most of southwest hydropower station reservoir area in China are a large number of giant accumulation, and complex geological conditions and surroundings forcing deposit of easily lead to deformation and instability of accumulation damming events. In integrated predecessors research results, on the basis of a large number of landslides damming events more tangible geological model is established first, and then use accumulation deduction and numerical simulation method of the historical evolution process and explain the possibility of front accumulation incident, combination of accumulation damming conditions slip were used respectively to calculate mode method and empirical formula method to calculate the same conditions of damming''s height. Results show that the two methods to predict the same buckling mode of accumulation damming height gap is not big, so the prediction results can be thought of good credibility. To a decline in accumulation for damming have been established to predict the research idea, provide a reference for analysis of this problem.