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在水闸、抽水站等水工建筑物的渗流计算中,常常遇到较为复杂的地基情况,如渗透系数相差迥异的层状或不规则分布土、使用防渗板桩截断强渗透土层等,利用传统的计算方法,如直线比例法、阻力系数法等将不能很好地解决问题,对此可采用一种行之有效的数值解法——有限单元法。由于一般大、中型水工建筑物的渗流通常都作为平面稳定渗流问题考虑,这里仅以此为例,介绍有限单元法在渗流计算中的应用及相应的电算程序。
In the seepage calculation of hydraulic structures such as sluice gates and pumping stations, more complicated foundation conditions are often encountered, such as stratified or irregularly distributed soil with very different permeability coefficients, cutoff of strong permeable soil layers with seepage-proof sheet piles, The traditional calculation methods, such as the linear proportion method, drag coefficient method will not be able to solve the problem well, for which an effective numerical solution - finite element method. As the seepage flow of large and medium-sized hydraulic structures is usually considered as a problem of steady seepage of the plane, here only as an example, the application of finite element method in seepage calculation and the corresponding computer program are introduced.