Case study of Sahand Dam drainage using software (Geo studio)

majid nikniaz¹ masoud Motallebian²

1) M.Sc. Student in Geotechnics, Islamic Azad University, Shabestar Branch, Iran
2) Assistant Professor of Geotechnics, Islamic Azad University, Shabestar Branch, Iran

IOI Code : XDZC-FFFBG
Publication : National Conference on Architecture, Civil Engineering, Urban Development and Horizons of Islamic Art in the Second Step Statement of the Revolution(icacu.ir)
Abstract :
    Earthen dam is the largest structure in which natural materials with nonlinear behavior are used and this behavior is important from both the foundation and the body of the dam. Depending on the amount and condition of the load on it, the ground or foundation must withstand the loads at all stages, and hydraulically, the amount of water passing through the foundation and the body must be within the allowable range. In the meantime, it seems necessary to study the seepage flow from the body and the earth dam in order to be aware of the pore water pressure, reservoir water losses and the possibility of leaching the fine particles of the core. In this research, the seepage flow from the foundation and body of the dam and the effect of drains in preventing leaching of earthen dam materials and disappearance of pore water pressure and, by its nature, improving the stability of Sahand Dam have been investigated. By numerical modeling and using SEEP / W software which is a subset of GeoStudio software, leakage flow analysis and results are compared using the instrumentation data used in the dam. The results show the proper performance of Sahand Dam against seepage currents from the foundation and body of the dam. Examination of seepage and drainage inside the core shows that the improvement of free water level in the clay core and also the gradient decrease in the downstream area due to the presence of vertical and horizontal drainages is desirable and normal and by comparing the discharge from the foundation and heel of the dam Good performance was observed for dam drainage.

Keywords : earthen dam seepage drainage numerical modeling instrumentation