糯扎渡水电站泄洪隧洞防空蚀破坏设计总结

Design Summary of Anti-cavitation Damage in Flood Spillway Tunnel of Nuozhadu Hydropower Station

糯扎渡水电站泄洪隧洞具有高水头、大泄量、高流速的特点,最大水头125.6m、最大泄量达3 395m^3/s、最高流速可达41m/s。高流速的泄洪隧洞常因空蚀而遭到破坏,介绍了糯扎渡水电站泄洪隧洞针对空蚀问题对泄洪洞体型、掺气减蚀措施、抗冲蚀混凝土材料、过流面不平整度控制等问题的研究与设计。

The tunnel spillways of Nuozhadu hydropower station is characterized by high head, large discharge and high flow velocity etc. The maximum head is 125.6 m, the maximum flood discharge is 3395 m^3/s and the maximum water velocity is 41 m/s. The cavitation damage in flood discharge tunnel of high flow velocity is common. The research and design of preventing cavitation damage in Nuozhadu's flood discharge tunnel, included the layout of tunnel, aeration mitigation, abrasion resistant concrete, flatness control, is presented briefly in this paper.