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由于土石坝的心墙与坝壳渗透系数相差很大,心墙上、下游侧一般均设置较透水的反滤层或过渡层,所以当坝体挡水后,心墙下游坡将出现较长的渗出段,在解决这类问题时,存在着心墙浸润线逸出高度、下游坝壳浸润线起始高度,以及通过心墙或坝体的渗流量3个未知数,而根据心墙及坝壳渗流量的连续条件,只能建立两个方程式,所以不设法减少未知数(通常均使逸出点为已知)是不能解决这个问
Due to the great difference between the permeability coefficient of earth-rock dam and the dam shell, the water-permeable anti-filtration layer or transitional layer is generally arranged on the heart wall and the downstream side. Therefore, when the dam is dammed, the downstream wall of the heart wall will appear longer Of the exudation section, in solving such problems, there is a heart wall infiltration line escaping height, the initial height of the downstream dam shell infiltration line, as well as through the wall or dam seepage volume of three unknown, and according to the heart and The continuous condition of the seepage of the dam shell can only establish two equations, so it is not possible to solve this problem without trying to reduce the unknowns (usually making the escape point known)