Three Dimensional Finite Volume Solutions of Seepage and Uplift in Homogonous and Isotropic Foundations of Gravity Dams

摘要

In this paper, a three-dimensional version of NASIR finite volume seepage solver developed for tetrahedral mesh is introduced. The numerical analyzer is utilized for solving the seepage in homogeneous and isotropic porous media and uplift under gravity dams with upstream cut off wall. The results of numerical solver in terms of uplift pressure underneath of the dam base with upstream cut off wall are compared with analytical solutions obtained by application of from conformal mapping technique for a constant unit ratio of foundation depth over dam base (T/b = 1). The accuracy of the results computed uplift pressure present acceptable agreements with the analytical solutions for various ratios of cut off wall over the dam base length (s/b).