DESIGN CONDITIONS FOR MORNING-GLORY SPILLWAYS:APPLICATION TO POTRERILLOS DAM SPILLWAY
Design of morning-glory spillways has special features, because the hydraulic behavior of this structure is strongly related to the boundary topography, crest diameter, curve or bend downstream, spillway profile and the tunnel dimensions towards the outlet section. In the case of Potrerillos dam, located on Mendoza River, Argentina, a morning-glory spillway was selected. This spillway must be able to pass a design discharge of 1800 m3/s at flee surface, being characterized by a 31,76 m-crest diameter, 13.40 m-cross section diameter, a vertical 90° curve of 44.67 m-radio and a 400 m-length horseshoe cross section tunnel of 11.80 m-diameter. A special study was developed at National Institute of Water in order to analyze the hydraulic performance of the spillway. The physical model studies allowed determining a final location different from that considered in the project, optimizing the boundary conditions close to the spillways, modifying the number of piles on the crest and improving by these means the hydraulic performance of the whole structure, including flow characteristics inside tunnel. Final hydraulic design was compatible with structural design, allowing besides that a strong reduction of rock excavation.
morning-glory spillways Potrerillos dam physical model
Claudio A.Fattor Jorge D.Bacchiega
National Institute of Water, Casilla Correo 21, B1802WAA-Ezeiza, Argentina
国际会议
第16届亚太地区国际水利学大会暨第3届水工水力学国际研讨会(16th IAHR-APD Congress and 3rd Symoposium of IAHR-ISHS)
南京
英文
2123-2128
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）