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

作　　者：孙双科[1] 徐建荣 柳海涛[1] 彭育 薛阳 SUN Shuangke;XU Jianrong;LIU Haitao;PENG Yu;XUE Yang(State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute if Water Resources and Hydropower Research,Beijing 100038,China;Huadong Engineering Corporation Limited,Hangzhou 311122,China)

机构地区：[1]中国水利水电科学研究院,北京100038 [2]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122

出　　处：《水利学报》2021年第10期1240-1247,1262,共9页Journal of Hydraulic Engineering

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,该工程1^(#)表孔出口采用外侧单边齿坎、4#表孔出口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较优布置方案。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出口宽度的0.18~0.23倍、挑角宜采用15°~20°,是较佳的细部结构布置参数。上述研究成果可供类似工程参考。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 introduces an integral hydraulic model test of Baiheta hydropower station,in which there are 6 overflow outlets and 7 deep outlets,studying on the overflow outlet dentated bucket layout method,detail structure shape and its effect.The study shows that for this project,1^(#)overflow outlet using lateral unilateral dentated bucket,4#overflow outlet with dou⁃ble side dentated bucket arrangement method,can effectively reduce the impact pressure of the bottom plate.Further experimental study to the dentated bucket width and pick angle found that the width of a sin⁃gle dentated bucket on overflow outlet is 0.18-0.23 times of the width of the front,and the pick angle is 15-20 degrees,which is the best detail structure parameters.The above research results can be used as reference for similar projects.

关 键 词：分流齿坎 表孔 消能 水垫塘底板 冲击压强 

分 类 号：TV131.61[水利工程—水力学及河流动力学]