糯扎渡水电站水力设计关键技术研究

糯扎渡水电站枢纽工程由心墙堆石坝、溢洪道、泄洪隧洞及引水发电系统组成;总泄洪功率高达66940MW;溢洪道最大泄洪流量高达31318m3/s,泄洪最大水头182m,泄洪功率达55860MW,采用了预挖消力塘的消能方案;泄洪隧洞工作水头达120m,采用双孔合一的闸门布置形式,高水头大流量的泄洪消能问题十分突出;尾水隧洞和导流隧洞结合,尾水调压井直径达33m,水力设计复杂;通过计算分析和水工模型试验研究,较好地解决了堆石坝枢纽工程中溢洪道、泄洪隧洞的掺气减蚀、消力塘护岸不护底等水力设计难题,并将运用于工程实践。

Key Technology Research Results in Hydraulic Design of Nuozhadu Hydropower Station

Nuozhadu Hydropower Station project consists of core wall rockfill dam?spillway?spillway tuunels and power generation system;The maximum flood discharge power of power station is 66940 MW;The maximum flood discharge of spillway is 31318 m3/s with the maximum head of 182m and the flood power of 55860MW,the stilling basin was bulit for energy dissipation at tail end of spillway;The maximum operation head of spillway tunnels is 120m,two orifices of water gate combine to be a hole in the spillway tunnels,the problem of discharge and energy dissipation is very complex;Tailrace tunnels are combining with diversion tunnels,the tailrace surge tank's diameter is 33m,correlative hydraulic design is a very complex problem;According to the achievement of calculation and model experimentation research,the problems have been solved reasonably that include aeration for mitigating cavitation on spillway and spillway tunnels and bank protection.These achievements will be applied to engineering project.