文章摘要
高拱坝溢流表孔分流齿坎的布置体型与作用效果[*]
The layout shape and effect of dentated bucket on overflow outlet in high arch dam
投稿时间:2020-12-14  修订日期:2021-06-25
DOI:
中文关键词: 分流齿坎;表孔;消能;水垫塘底板  冲击压强
英文关键词: dentated bucket  overflow outlet  energy dissipation  floor of plunge pool  the impact pressure.
基金项目:
作者单位邮编
孙双科 中国水利水电科学研究院 北京 100038
彭育 中国电建集团华东勘测设计研究院有限公司 
柳海涛 中国水利水电科学研究院 北京 
薛阳 中国电建集团华东勘测设计研究院有限公司 
徐建荣 中国电建集团华东勘测设计研究院有限公司 
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中文摘要:
      在高拱坝工程溢流表孔上设置分流齿坎具有分散水舌能量、降低下游水垫塘底板冲击压强的作用,是一种颇具竞争力的体型优化技术措施。本文结合采用6表孔与7深孔布置的白鹤滩水电站,开展了坝身泄洪水工模型试验研究,系统研究了溢流表孔分流齿坎的布置方法、细部结构体型及其作用效果,研究发现对于该工程而言,1#表孔出采用外侧单边齿坎、4#表孔采用双侧边齿坎的分流齿坎布置方法,是降低下游水垫塘底板冲击压强的最佳布置方案。针对分流齿坎的宽度与挑角开展的进一步研究发现,单个分流齿坎的宽度宜取表孔溢流前缘宽度的0.2倍、挑角宜采用20?,是最佳的细部结构布置参数,上述研究成果可供类似工程参考。
英文摘要:
      It is a competitive technical measure to optimize the shape of high arch dam by setting dentated buckets on the overflow outlet, which can disperse the water tongue energy and reduce the impact pressure on the bottom of the downstream water cushion pond. This paper uses Integral hydraulic model test of BAIHETA hydropower station, in which have 6 overflow outlets and 7 deep outlets, studied the overflow outlet dentated bucket layout method, detail structure shape and its effect, the study found that for the project, 1 # overflow outlet using lateral unilateral dentated bucket, 4 # overflow outlet with double side dentated bucket arrangement method, is to reduce the downstream plunge pool floor impact the optimal pressure. further experimental study to the dentated bucket width and pick angle found that the width of a single dentated bucket on overflow outlet is 0.2 times of the width of the front, choose appropriate uses 20 ?, is the best detail structure parameters, the above research results can be used for reference in the similar projects.
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