土坝饱和-非饱和渗流数值分析方法研究

本文提出土体非稳定渗流数学模型和新计算方法,用以计算土坝饱和-非饱和区的渗流。在数学方程求解和数值计算中,采用伽辽金有限元法结合隐式向后差分法,编制出简单合理和切实可行的计算程序SUSED。并以唐山陡河土坝为计算对象,从坝中取样通过试验求得计算参数,用本文方法对该坝饱和-非饱和渗流进行数值计算,计算结果规律正常,令人满意,说明上述数学模型和计算方法是行之有效的,适用于稳定渗流和非稳定渗流。

Numerical Analysis Method for Saturated-Unsaturated Seepage Flow in Earth Dams

In this paper, a new computational method with a mathematical model of transient flow in soil masses is proposed for solving the problem of saturated-unsaturated flow in earth dams. The numerical calculation of mathematical equations is derived by using Galerkins finite element method and the implicit backward difference scheme. A simple program is also presented. The above procedure is used to calculate the saturated-unsaturated flow in the Douhe Earth Dam in Tangshan. The parameters are obtained by testing the samples taken from the dam. The result is found to be reasonable and satisfactory indicating that the mathematical model and the solution procedure described above are effective in practice. The model and the procedure are rational and suitable for solving saturated-unsaturated flow problems.