二级电站压力钢管及引水隧洞检查案例

Inspection Cases of Penstock and Diversion Tunnel of Cascade Ⅱ

基于工程压力钢管及引水隧洞为有压隧洞,隧洞放空后隧洞内外压力变化较大,容易发生坍塌和掉块。阐述华光潭二级电站压力钢管及引水隧洞停役、检查方案,长距离引水隧洞停役检查与应急处置。

Based on the fact that the penstock and the diversion tunnel are pressure tunnels, the internal and external pressure of the tunnel changes greatly after the tunnel is vented, which is prone to collapse and block falling. This paper describes the shutdown and inspection scheme of penstock and diversion tunnel of Huaguangtan Ⅱ hydropower station, and the inspection and emergency disposal of long-distance diversion tunnel.