ATS水利枢纽1~#深孔放空排沙泄洪洞消能工优化研究  

Research on Optimization of Energy Dissipator for Emptying and Discharging Sediment & flooding Tunnel in Deep Hole 1~# at ATS Water Conservancy Project

作　　者：崔忠[1] Cui Zhong(Xinjiang Water Conservancy and Hydropower Survey and Design Institute Urumqi 830000, Xinjian)

机构地区：[1]新疆水利水电勘测设计研究院,新疆乌鲁木齐830000

出　　处：《陕西水利》2018年第3期218-220,共3页Shaanxi Water Resources

摘　　要：ATS水利枢纽1~#深孔放空排沙泄洪洞采用底流消能形式,消能工的设计对1~#深孔放空排沙泄洪洞的运行有重大影响。通过水工模型试验对1~#深孔放空排沙泄洪洞的消能工体型进行实验研究,1~#深孔放空排沙泄洪洞消能工设置消能墩和消涡栅消能效果显著,但消能墩在较大的临底流速下存在自身的稳定和安全问题,消涡栅在水体中存在比较严重的空化空蚀问题。降低消能工底板高程,可提高效能率,通过取消消力墩和消涡栅,改变消力池的底板高程,并进行10组模型试验,确定出合理的消力池底板高程和跌坎高度。优化后消力池出口及尾水渠的水面衔接平稳,下游河床冲刷坑深度向下游移动,冲坑最低点远离消力池冲坑护坦末端。In the ATS water conservancy project, for No. 1 deep hole emptying and sediment discharging tunnel, it uses the bottom energy dissipation form, and the design of the energy dissipator has a significant impact on the operation of the deep hole 1#emptying and sand discharging. Through the hydraulic model test, the article has an experimental study on the energy dissipating body type of the 1# deep emptying and sand discharging spillway. Its energy dissipation effect was obvious with energy dissipation pier and Vortex elimination grid, but energy dissipation piers have their own stability and safety problems at large bottom flow velocity, and there are serious cavitation and cavitation problems in dissipating vortex barriers in water bodies. Lowering the elevation of the bottom plate of the energy dissipator can increase the efficiency. By eliminating the force reduction piers and the scavenging barrier, the floor elevation of the stilling pool can be changed, and 10 sets of model tests can be conducted to determine a reasonable bottom and elevation of the bottom of the stilling basin.. After the optimization, the water surface at the outlet of the water dissipation basin and the tailrace canal is connected smoothly, and the depth of the downstream riverbed scouring pit moves downstream. The lowest point of the scouring pit is away from the end of the cistern in the stilling pool.

关 键 词：深孔放空排沙泄洪洞 消能工 水工模型试验 跌坎 

分 类 号：TV653[水利工程—水利水电工程]