串联渠池闸门同步关闭情况下关闸时间 对闸前水位雍高影响

针对采用应急同步关闸措施导致的水位雍高问题, 分析了多闸门同步关闸情况下不同关闸时间对水位雍高的 影响。通过建立一维水力学模拟模型, 进行了大量的关闸工况计算, 研究了上、下游节制闸分别关闸动作对闸前水 位的影响过程, 结果表明, 下游节制闸的关闸过程中产生的水位涨幅速率远大于关闭完成后的水位涨幅速率。并以 此为依据设置了不同的下游关闸时间, 分析上、下游节制闸同步动作情况下关闸时间对闸前最大雍高产生时间与雍 高高度的影响, 结果表明最大雍高出现在上游水波传递到下游的时间或者滞后一小段时间, 且下游关闸时间是影响 水位雍高的主导因素。通过对多渠池联调下其他渠池的闸门调控对研究渠池的水位影响分析, 得出了同步关闸情 况下渠池雍水基本只受本渠池上、下游闸门动作的影响的结论, 从而为多闸联调情况下闸前水位优化提供了参考。 In view of the problem of water level rising caused by emergency synchronous closure of contro l gates, this paper analyzes the influence of different closure time on the water level under the condition of sy nchrono us closure of multiple g ates. We established a one2 dimensional hydraulic simulation model, conducted plenty of calculations on clo sure conditions, and studied the influence of the closure of upstream and dow nstream contr ol gates on the w ater level before the gate. The r esults showed that the water level rise rate during the closur e process of the dow nstr eam control gate was much greater than that after the completion of the closure. On this basis, w e set dif2 ferent downstream gate closure time, and analyzed the influence of the closure time on the height and happening time of the max imum water level during the synchronous closure of upstream and downstream control gates. The results showed that the maximum w ater lev el appeared during the transmissio n of the upstream water wave to the downstream section or a short time after that, and the dow nstr eam gate closure time was the dominant factor affecting the w ater level. After analyzing the influence o f gate o peratio n in other po ols on the water level of the study poo l in a multi2channel system, we concluded that the water level of a poo l is basically affected by the operation of the upstream and dow nstr eam g ates of the poo l alone under the condition of sy nchronous closure. This paper can prov ide a reference fo r the optimization of the water level before the g ate under synchronous closure 水体污染控制与治理科技重大专项( 2017ZX07108001)