Hydraulic research results for cantilever spillway at Hydroelectric power station 2 of Chirchik – Bossuv waterway

Abstract

To date, in the water sector, such urgent problems of our time as the observed decrease in the reliability and safety of hydraulic structures and their individual elements are highlighted. The level of effectiveness of water distribution management and the timely supply of electricity to consumers depends on the stable operation of the entire hydraulic complex. Water management construction is very material-intensive and requires constant expenditures of material and energy resources to maintain the level of stable operation. However, in the event of an emergency at hydroelectric power station facilities, it is extremely difficult to provide the necessary resources for carrying out restoration work on time. In the practice of hydraulic engineering, various designs of cantilevered spillways have been widely used. Reliability and trouble-free operation of such spillway structures with the conjugation of downstream divers by a jet largely depend on perfection. This article discusses the problems of local erosion in the downstream of hydraulic structures, sets out the results of experimental studies to determine the depth of local erosion behind a cantilever spillway in the outlet channel with recommendations on its end structure.