重力坝表孔泄洪能力设计与模型试验论证分析OA

The overflow surface hole of a gravity dam is a WES practical weir,with a crest elevation 4m lower than the normal water level and a maximum discharge flow of 191.6 m3/s.The original design scheme had a compact and reasonable overall layout,with a suitable depth and length of the dissipation pool.Through hydraulic model tests,it has been optimized to increase the current displacement and height by 1 meter by adding an aeration barrier to the discharge chute and a tail barrier to the dissipation pool.After optimization,the water flow along the way is basically positive pressure,and the flow state along the way is relatively smooth.The recommended design of the overflow surface hole and related optimization schemes in the test are safe and feasible.