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基于白鹤滩水电站导流模型,选取六种围堰残埂高度(高0、1、3、5、7、9m)对导流洞总来流量(分十级流量)的影响进行了试验研究,量测了上游水位、导流洞泄流量等水力特性参数,分析了导流洞进出口不同围堰残埂高度对导流洞泄流能力的影响,并以残埂淹没度作为判别残埂对导流洞泄流能力有无影响的指标。结果表明,残埂高度大于3m时,残埂越高、泄流量越小,残埂对导流洞泄流能力的影响就越大;残埂淹没度临界值约为7,当淹没度大于7时残埂对导流隧洞泄流能力的影响可忽略不计。
Based on the diversion model of Baihetan Hydropower Station, the influences of six kinds of cofferdam residual height (0,1,3,5,7 and 9m) on the total flow in the diversion tunnel are analyzed. The hydraulic parameters such as upstream water level and discharge of diversion tunnel were measured. The influence of different cofferdam height at diversion tunnel entrance and exit on the discharge capacity of diversion tunnel was analyzed, and the degree of residual flooding Diversion hole discharge capacity of whether the impact of indicators. The results show that when the residual height is more than 3m, the residual residual height is larger and the discharge capacity is smaller. The residual residual capacity has more influence on the drainage capacity of the diversion tunnel. The critical value of residual capacity is about 7, The impact of residual debris on the drainage capacity of the diversion tunnel is negligible.