Rock slope stability analysis for a slope in the vicinity of take-off yard of Karun-3 Dam

摘要

Karun-3 is a 205 m high concrete dam constructed at 28 km to the south of Izeh in Iran.The objectives of the construction of this Dam & Hydro-electric Power Plant are electric Power supply and floodcontrol. Karun-3 power generators are connected to the National Power network as the Peak Power generation.With this power plant being operated,with the capacity of 2000 MW,and an average electric power generationof 4137 GW.h/y,a major portion of the electric power shortage in the country will be met. The underground powerhouse complex in this dam is one of the largest of its kind in the world,includingpowerhouse and transformer caverns,inlet valve gallery and related tunnels,two of which transfers electricityfrom the transformer cavern to the take-off yard at the surface. The take-off yard has been placed at the toe of a very dangerous slope named G2M,which seemed to beinstable after the excavation of the yard. This paper is dealing with the stability analysis of rock slope placedabove the take-off yard and proposes the method of stabilizing the slope without which the power plant wouldconfront many difficulties.