蟒河口水库近坝址区渗漏规律研究

由于蟒河天然来水量较小,再加上蟒河口水库库区地质条件复杂,多条断层是潜在的危险渗漏通道,故必须采取措施防止蟒河口水库大规模的渗漏发生.根据防渗方案和地质参数建立了蟒河口水库近坝址区三维有限元模型,通过多种工况的渗流分析与对比,结果表明:蟒河口近坝址区在仅有大坝防渗的情况下每年的渗漏量巨大,无法满足工程开发任务要求的蓄水量.设置灌浆帷幕和防渗面板措施处理以后,近坝区每年的渗漏量比仅有大坝防渗时大约可以减小880万m3,且采用帷幕防渗措施以后,库区岩体内浸润线的空间位置有所降低,沿帷幕线上下游断面的水头差增大,说明防渗设计方案较为合理有效.在防渗措施和上游水位相同的情况下,下游水位越低渗漏量越大;在防渗措施和下游水位相同的情况下,上游水位越高近坝区渗漏量增加很快,表明渗漏量对上游水位的变化更加敏感.

Seepage Research on Neighborhood Region of Manghekou Reservoir

As the natural inflow of Manghe River is smaller and the geological conditions of Manghekou reservoir are complex,a number of faults are potentially riskful leakage passage,some measures must be adopted to prevent the large-scale leakage from occurring.According to seepage and geological parameters,a three-dimensional finite element seepage model was established.By means of a variety of working condition analyses and comparisons,results show the seepage volume is large under the existing anti-seepage condit...