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通过对我国某水库研究,发现其坝下覆盖层较厚,并且河床下伏岩体及坝址处左、右坝肩属于中等-弱透水层,相对不透水层埋藏较深。很多坝区存在的严重的坝基渗漏、坝肩绕渗等问题,都是由于忽略了对覆盖层及下伏岩体的处理。本文根据渗流理论,通过分析该坝区地质条件,从经济上、技术上、安全上对比了两种预选方案,最后确定了较好的对坝肩及坝基处理方案。
Through the study of a certain reservoir in our country, it is found that the cover under the dam is thick, and the underlying rock mass in the riverbed and the left and right abutments at the dam site belong to the medium-weak aquifer, and the relatively impermeable layer is buried deeper. In many dam areas, there are serious problems such as seepage of dam foundation and seepage around dam abutments, which are caused by neglecting the treatment of overburden and underlying rock mass. According to the theory of seepage, by analyzing the geological conditions of the dam area, two kinds of preselection schemes are compared economically, technically and safely, and finally a better treatment scheme for dam abutment and dam foundation is established.