An applicability of A. Casagrande’s solution for the seepage flow through fill dams

We clarified the applicability of A. Casagrande's solution for the seepage flow through fill dams by several model experiments and FEM analysis, and also tried to examine how to increase the estimation accuracy of the quantity of the seepage flow and the seepage point, calculated from the solution. The analysis results showed the following three main findings: 1) For the calculation of the quantity of the seepage flow, the solution could be applicable over a α range of 45° to165°. And for that of the seepage point, it could be applicable over a α range of 45° to180°. 2) To improve the estimation accuracy of the solution, it tried to examine the determination of the intersection point of the basic parabola line and reservoir water level. The several simulated results showed that it was not out of order to change the conventional value. 3) Also, for the ratio c that defined by Casagrande, it could be applicable over a α range of 45° to 180°. However, for α=30°, it could be necessary to examine the applicability of the solution further