FINITE ELEMENT ANALYSIS OF A NONSTEADY SEEPAGE PROBLEM

Abstract

The finite element method has been applied to the analysis of seepage problem in steady state as well as the finite difference method, but rarely in nonsteady state. The aim of this study is to extend the application of the finite element method to the analysis of nonsteady seepage problem.Firstly, this paper describes the principle of the finite element method in nonsteady seepage problem and the procedure of the analysis, especially on the techniques for calculating the variation of free surface and for determining the position of seepage-out point. Secondly, an example is shown : the analysis of the seepage through an earth dam with a core and a horizontal drainage, in nonsteady state.