关键词: 导流洞进口;一槽双门;封堵闸门;检修闸门;乌东德水电站;

Abstract: In order to solve the maintenance problem of diversion tunnel in large hydropower station and optimize the inlet layout of diversion tunnel, taking the diversion tunnel project in Wudongde Hydropower Station as an example, we analyzed and studied the layout of maintenance channel, maintenance gate and buried parts of the diversion tunnel, and then put forward a design scheme of 'one slot-two gates', i.e. a common set of gate slot shared by maintenance gate and sealing gate. The layout scheme of gate and gate slot, the selection of gate slot type and the main structural design process of gate slot were expounded in detail. The actual engineering operation results showed that the design scheme of 'one slot-two gates' could not only meet the maintenance and sealing function of diversion tunnel, but also greatly reduced the construction difficulty, saved the construction period and reduced the engineering investment. This scheme can provide reference for similar project.

Key words: diversion tunnel inlet; one slot-two gates; sealing gate; maintenance gate; Wudongde Hydropower Station