Abstract
Finite Element Approach is employed in this research work to solve the governing differential equations related to seepage via its foundation's dam structure. The primary focus for this reason is the discretization of domain into finite elements through the placement of imaginary nodal points and the discretization of governing equations into an equation system; An equation for each nodal point or part, and unknown variables are solved. The SEEP / W software (program) is a sub-program of the Geo-Studio software, which is used by porous soil media to compensate for the problems of seepage. To achieve the research goals, a study was carried out on Hemrin dam, which located in the Diyala River 100 km northeast of Baghdad, Iraq. Thus, one cross-section is selected for different elevations (minimum, normal and maximum or flood design elevations) to compute the seepage of water, pore water pressure and phreatic line. By theoretical analysis appeared that when the water reservoir was connected to the flood level, a problem may occur in the downstream face of the dam lead to seepage failure. A set of solutions checked by using the Geo-Studio software has been suggested in this research to solve this problem. In addition, and by analytical approach SLOPE/W (a sub-program of the Geo-Studio software) are used to assess the stability of the downstream slope and calculation factor of safety.
Highlights
Earth dams always connected with seepage as they reserved water in it
At this level where water can escape from any part of the downstream area, because the phreatic line is along potential seepage face, which may lead to seepage failure
Software was used to compute seepage, while SLOPE/W was used for computation minimum safety factor
Summary
Earth dams always connected with seepage as they reserved water in it. The water search for paths of lower resistance through the dam and its foundation. It is located about 120 Km from Baghdad to the northeast and 68 Km from Baquba city in the same direction. Arshad and Baber et al(2014) showed that seepage analysis of earth dam can be efficiently performed utilizing finite element based SEEP/W software. This program is able to estimate various flow net parameters such as seepage discharge, exit gradient, seepage velocity, pore pressure, and lifting pressure at any desired point in the flow net. Shivdakumar et al(2015) show that using PLAXIS 3D software, the finite element modeling results are presented for stability analysis and earth dam seepage analysis
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