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一、問題的產生土坝的坝基处理問題是一个比較复雜的地質技術問題。因为筑坝地点坝基的岩土本來是在外力作用之下处于不断的变化之中,而在筑坝时坝基上已受到坝体的荷重作用,壅水形成以后在水头的作用之下水文地質条件又發生了很大的改变,滲流对地基土体的作用力远远超过原來地下水与雨水的作用,因而引起坝基岩石的各种性能發生变化。变化的結果往往給建筑物造成不利条件,所
First, the problem of earth dam dam foundation treatment is a more complex geological problems. Because dam site at the dam site of rock and soil under the action of external forces are constantly undergoing changes in the construction of the dam foundation has been subjected to the load of the dam body, the formation of water after the head under the hydro-geological conditions Another great change has taken place. The seepage force on the foundation soil far exceeds that of the original groundwater and rainwater, which leads to the change of various properties of the dam foundation rock. Changes often result in unfavorable conditions for the building