某水电站截流方案比选

发布时间：2018-05-08 08:55

  本文选题：截流 + 加糙　； 参考：《水电能源科学》2017年04期

【摘要】：截流工程是水电工程建设极其重要的环节。针对截流时龙口水力学指标过高,抛投料流失严重的问题,结合某工程实例,通过模型试验对比研究了S型龙口、S型龙口和导沙坎开孔、河床加糙、拦石栅立体加糙四种截流方式的水力学指标变化规律。结果表明,拦石栅立体加糙方案的龙口落差减少率、龙口流速减少率以及龙口单宽功率减少率分别为10%、30%、20%,此外,该方案还能有效减小抛投料流失率,尤其是大块石料等人工特殊料使用量减少率高达67%,大大降低了施工难度和成本。这种方式尤其适用于龙口落差大、流速快、单宽功率大且大块石缺乏的工程。
[Abstract]:The closure project is an extremely important link in the construction of the hydropower project. In view of the problem of the high hydraulic index of the dragon mouth and the serious loss of throwing material, the hydraulic indexes of the four types of S type Longkou, S type dragon mouth and guide Shah Can Cacon, the river bed roughness and the stereoscopic roughness of the barrage are studied by the model test. The results show that the reduction rate of the dragon mouth drop, the reduction rate of the dragon mouth flow rate and the reduction rate of the single wide power of the dragon mouth are 10%, 30% and 20% respectively. In addition, the scheme can effectively reduce the loss rate of throwing materials, especially the reduction rate of artificial special materials such as large blocks of stone, which greatly reduces the difficulty of construction. This method is especially suitable for projects with large gap, fast flow speed, single width and large power and large stone shortage.

【作者单位】： 四川大学水力学与山区河流开发保护国家重点实验室;
【基金】：国家自然科学基金项目(5151101496)
【分类号】：TV551.2
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本文编号：1860762