澜沧江曼厅河段应对清水冲刷的模拟研究

Simulation Analysis of the Clear-water Scour in Manting Waterway of Lancang River

为应对电站清水下泄对大型复杂浅滩的冲刷影响,采用曼厅河段动床物理模型,结合电站运行方式采用极限冲刷方法进行模拟。结果表明,曼厅河段普遍冲刷和局部冲刷明显,整治建筑物群附近产生普遍冲刷坑,丁坝头部冲坑明显。若不采取防护工程措施,曼厅河段Ⅴ航道难以得到保证。根据试验成果,给出了有效的防护思路供相关单位参考。

In response to the scouring effect to the large complex shoal which is caused by release of clear water of hydropower station, movable bed physical model of Manting Waterway was adopted, and limit erosion method was used which combines with the operation mode of hydropower station to simulate the process. The results show that the general scour and local scour of Manting river is obvious, and there are many general scour holes near the regulating structures, and the scour hole of spur dike head is obvious. If we do not take protective measures, it may difficult to guarantee class-V waterway of Manting Waterway. According to the test data,this paper presents effective treating measures for reference.