Abstract: The design and problem during running of the spillway tunnel No.1 of Ertan hydropower station was introduced in this article. In order to solve the problem, a lot of investigation by scientific research institution has been done. A “protrudent- ridge and side shrink” three- dimensional aeriferous renovation project was gave. It was proved successful after running. This is the first time such particular formused in the end of reverse arc of high water level and great flux city gate hole form spillway. It has been of origination. The availability attempt and successful renovation experience in decreasing the cavitation corrosion of spillway of Ertan hydropower station has been of good reference for other water projects which with high velocity of flowand great discharge. This result of the scientific research has broad generalization and application value. It has promoted the development of hydro projects of our country.

摘要： 本文介绍了二滩水电站1号泄洪洞的设计及运行中出现的问题, 针对出现的问题, 进行了大量的研究, 提出了“突坎+侧收缩”的三维掺气改造方案, 并经过实际运行, 证明改造方案是成功的。这是该类型三维掺气消能方式首次应用于高水头、大流量城门洞式泄洪洞的反弧末端, 具有首创性。二滩水电站在泄洪洞减免蚀方面所做的有益尝试和成功的改造经验对其它高流速、大泄量的泄水建筑物具有很好的借鉴意义。该科研成果具有广泛的推广应用价值, 对推动我国水工水力学的发展具有重要和深远的意义。