Abstract
The drainage system is used to guide the flow of water in the earth dams. Construction of drainage in the dam body to collect and direct the drainage formed in the dam body to keep the slope dry and prevent the increase of pore water pressure in the body. One of the main goals of the designers is to find the minimum factor of safety and, consequently, reduce the cost of construction. In this study, the Marvak dam is modeled with the actual characteristics of the materials in the Geostudio software, and with the change in the dimensions of the drain, the material and the slope of the dam body, the minimum Factor of safety of the dam is obtained. In order to predict the minimum Factor of safety, a two-layer neural network has been used. With the training of the neural network based on the data obtained from heterogeneous dams, a minimum Factor of safety has been extracted for optimization of drainage. Finally, it was determined that the internal friction angle of the body material and the slope of the dam have the greatest effect on the dam factor of safety.
Highlights
INTRODUCCIÓNThe construction of a horizontal drain for collecting and guiding the water drainage formed by the dam is intended to keep the bottom slope of the downstream dam dry and prevent the increase in pore water pressure in the body of the dam
El sistema de drenaje se utiliza para guiar el flujo de agua en las presas de tierra
The results showed that the toe drainage system had the best slip stability with a factor of safety of 1.656
Summary
The construction of a horizontal drain for collecting and guiding the water drainage formed by the dam is intended to keep the bottom slope of the downstream dam dry and prevent the increase in pore water pressure in the body of the dam. Fattah et al (2017) studied saturation phenomena in earth dams using Geostudio software Their results showed that during rapid discharge of the reservoir, the pore water pressure in the dam body decreases linearly, indicating steady state flow. The Marvak earth dam with different characteristics of Geostudio software is modeled and by changing the dimensions of the drain, the material of the material as well as the slope of the dam, a minimum Factor of safety for the dam is obtained. The percentage of the effect of different parameters of the dam in the factor of safety will be minimized
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