关键词: 导流洞, 渐变段, 中墩, 穿行式承重支撑, 杨房沟水电站

Abstract:

To allow pass and transport below the scaffolds, ensure the construction quality, reduce construction workload, and accelerate the construction progress, the selection of safe, economical and suitable construction scheme of load-bearing support for complicated structural site at the diversion tunnel inlet of hydropower station is of great important to the general benefit of the project. The transition section of the diversion tunnel inlet and the fall section of three-dimensional curved-surface of the lock chamber were taken as examples, and the support scheme comparison, system design, construction process control and construction effect are introduced in detail with the passable load bearing support as the focus. The experiences of the project can provide reference for other similar bearing load structure construction.

Key words: diversion tunnel, transition section, central pier, passable load bearing support, Yangfanggou Hydropower Station