ABSTRACT
ABSTRACT: An Austrian-Turkish Consortium is constructing the hydro power plant Ermenek in Turkey for the Turkish State Hydraulic Works, DSI. The project is located in the South of Turkey, at the Ermenek river, and has an installed capacity of 300 MW with an estimated annual energy output of 1000 GWh. The project consists of an arch dam, a large grout curtain, a pressure tunnel, a power house and appurtenant structures. The 218 m high double curved thin arch dam is located in a mega-block (Olistolith) of Nadire limestone. The highly karstified limestone is sealed at both sides of the dam by a huge grout curtain of 682.00 m2. The performance of this grout curtain together with the drainage curtain in the vicinity of the dam abutment is of high importance for pore water pressure and consequently the dam stability. In addition the grout curtain should reduce the seepage to a minimum. Further on the tightness of the reservoir itself is of high interest due to the low water inflow (yearly average 42.3 m3/s) compared with the reservoir volume of 4600 mio m3.
