Investigation on Seepage Pattern and Design of Toe Drain in Homogenous Earth Dam on Impervious Foundation Using Physical Model and PLAXIS

Pore pressure, seepage and drainage discharge through in earthen dams are the most important characteristics that have to be defined in order to analysis an earth dam. These parameters have been measured since beginning of building dam. In this investigation, a physical model of homogenous earth dam created in the flume with three different angles of toe drain, then pore pressure of earth dam was measured by piezometers that put on the wall of the flume. Discharge of drainage was measured too. The seepage analysis was conducted by PLAXIS software then Result of the PLAXIS compare with physical model by SAS (Statistic software) and finally the best angle and without dimension index, p/h, propose for toe drain according to results & observations.