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利用某水电站截流模型,研究了立堵截流过程中龙口流速、落差、单宽功率的变化规律,同时分析了龙口水力要素与不同截流方案下抛投强度的依存关系。试验研究表明,截流过程中最大单宽功率出现在龙口宽度比为0.32时,这一时期抛投强度和大规模抛投材料使用量最大即截流难度最大,是截流关键期。另外,通过对比,不同截流方案下各龙口水力要素最大值(龙口区水流最大落差、最大流速与单宽功率)与抛投强度、大规模抛投材料均有一定关联,同时也受到截流流量、下游控制水位和抛投材料的重要影响。
Based on the closure model of a hydropower station, the variation rules of the velocity, the drop and the single-width power of the Longkou during the closure of the vertical plugging were studied. The dependence of the hydraulic factor of the Longkou and the throwing strength under different closure schemes was analyzed. Experimental studies show that the maximum single-width power during the closure process occurs when the ratio of longkou width is 0.32. During this period, the maximum throwing intensity and large-scale use of throwing materials are the most difficult to intercept, which is the key period for the closure. In addition, through comparison, the maximum of hydraulic factors (maximum water flow, maximum flow rate and single-width power) of each Longkou inlet under different closure schemes are related to the throwing intensity and large-scale investment materials, and are also affected by the interception flow, Downstream control of water level and throwing material important influence.