Engineering geological characteristics of Gachsaran formation of a leakage (Case Study: Dam Khersan 3)

Engineering geological characteristics they Dam Khersan 3 Gachsaran in order to evaluate the solubility of gypsum and leakage problems and select a suitable method for sealing Gachsaran formation that includes part of the reservoir was investigated. Khersan 3 dam, the concrete arch dam with a height of 195 meters on the 40 km south Lordegan city on Khersan river is under construction. Geological formations site includes Asmari limestone , marl, gypsum and gypsum formations Gachsaran marl and shale Pabdeh and Gurpi formations and River alluvium is. The seepag, dissolution, XRF, XRD in some samples was determined and the leakage of water from the reservoir was evaluated using numerical analysis. Results and due to the presence of large marl, Lvzhan make up less than 3 and High RQD Gachsaran formations no Kataf wall construction or grout curtains, are suggested.