摘要
针对某水利枢纽泄洪冲沙洞,采用动床模型试验的方法对消能区下游河床冲刷情况进行模拟研究,并根据不同泄洪工况冲刷情况提出优化思路和修改方案。试验结果表明:各工况下对下游河床的冲刷深度及冲坑形状,冲坑最低点均在退水渠轴线上;在校核工况下最大冲坑深度可达3.84m,钢筋石笼末端冲坑深度为1.38m。因此,退水渠末端防冲齿墙深度应不小于2m,才可保证退水渠及消力池自身安全。
According to the flood discharge sand hole of a water conservancy project,the scour of the downstream riverbed in the energy dissipation area was simulated by using the method of moving bed model test,and the optimization ideas and modification schemes were put forward according to the scour under different flood discharge conditions.Through the test results,it can be concluded that the scour depth and the shape of the downstream riverbed under various conditions,the lowest point of the scour pit is on the axis of the retreat channel,the maximum scour pit depth can reach 3.84m under the checking condition,and the scour pit depth of the end of the reinforced stone cage is 1.38m.Therefore,the depth of the anti-scouring teeth wall at the end of the retreat channel should be no less than 2m to ensure the safety of the retreat channel and the relieving pool.
作者
罗昌辉
Luo Changhui(Xinjiang Water Conservancy and Hydropower Survey and Design Institute Co.,Ltd.,Urumqi830000,China)
出处
《吉林水利》
2025年第1期22-26,共5页
Jilin Water Resources
关键词
泄洪冲沙洞
水工模型试验
冲刷深度
Flood discharge and sand flushing tunnel
Hydraulic model test
Scour depth
