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对清江隔河岩水利枢纽水垫塘消能工的水流流态、水面线、流速、点脉动压力、面脉动压力及下游冲淤变化等进行了观测。观测成果表明 ,在泄流量 Q =750 0m3/s ,H上 =198.93m ,H下 =87.1m的观测条件下 ,主要结论为 :①冲击区的脉动压力幅值比导墙上的大 ;②冲击区以外 ,导墙上脉动压力比底板上的大 ;③顺流向底板上的脉动压力幅值呈衰减趋势 ;④经过 1998年汛期的泄洪 ,一级消力池岸坡未发现异常现象 ,二级池内加糙墩 ,差动鼻坎未发现新的破坏现象。几年来的运行和观测表明 ,隔河岩工程的泄洪消能设计是成功的
The water flow pattern, surface water line, flow velocity, point pulse pressure, surface pressure fluctuation and downstream scouring and silting changes of the Geheyan reservoir hydro-junction dissipater in Qingjiang River were observed. The observation results show that under the observation conditions of Q = 750 0m3 / s, H = 198.93m and H = 87.1m, the main conclusions are: ① The amplitude of the pulsating pressure in the impact zone is larger than that on the guide wall; ② Outside the impact zone, the pulsating pressure on the guide wall is larger than that on the bottom plate. (3) The amplitude of the pulsating pressure on the downstream plate shows a declining trend. (4) After the flood discharge in the flood season in 1998, no anomalies are found on the first- Grade pool plus rough pier, differential nose ridge found no new damage. Years of operation and observation have shown that the design of flood discharge and energy dissipation of the Geheyan project has been successful