闸坝型水库新型泄洪调度方法研究

A Novel Flood Dispatching Mode for Sluice-Dam Type Reservoir

传统的泄洪调度试验,通常针对单个流量级进行闸门调度优化研究,而没有考虑闸门开启或关闭的连续性。在实际洪水调度过程中,可能存在闸门升降反复运行,管理较复杂。以汉江孤山航电枢纽泄洪调度试验研究成果为依托,在模型试验中,需要在不同的流量之间反复调整闸门的开启组合方式,确保小流量已经开启的闸孔,大流量要继续开启,不够再开别的闸孔,且出闸底缘水流尽量为自由出流,避免淹没闸门底缘,以减轻水流波动引起的闸门振动,另外冲坑深度等指标也需要满足要求,提出了流量由小到大或由大到小闸门单向性连续开启或关闭的新型调度方式。该方法具有闸门操作简单、运行安全的特点。

Traditional flood dispatching methods are usually targeted at the optimal scheduling of gate to meet the hydraulic requirements for a single flow with no consideration of the continuity of the opening or closing of gate,or even the repeated opening or closing operation between different flows,which makes the management more complex.In this paper,a novel flood dispatching mode of one-way continuous opening or closing of the gate in the presence of flows from small to large rate or from large to small rate is put forward for the Hanjiang Gushan navigation and power junction.In the model test,the opening combination of the gate shall be adjusted repeatedly between different flows so that the opening number of the gate corresponds to that of the previous and next flow rate.The flow at the bottom edge of the curved gate should be free to avoid submerging the bottom edge of the gate so as to reduce the vibration of the gate caused by the fluctuation of water flow.Indicators such as the flow pattern of outflow gate and the scour depth shall also meet requirements.The proposed flood dispatching method is simple to operate and runs safely.