光照水电站排水廊道预制拱施工技术

光照水电站施工工期紧，碾压坝坝体上升速度快，排水廊道施工慢会影响大坝混凝土浇筑进度。对坝体中施丁数量较多的“∩”型排水廊道进行优化及技术改进，采用廊道预制拱技术。实践证明，廊道预制拱技术不仅能够保证施工质量，而且施工省力并能缩短工期。

Constructing Technology of Drainage Corridor Precast Arch in Guangzhao Hydropower Station

Because of shorten construction period and fast rise speed of rolled dam, the slow drainage corridor con- struction speed will influence the schedule of dam concrete pouring. Thus the large constructing quantity of ＇∩ ＇ type drainage corridor in dam should be optimized and improved. The corridor precast arch technology has been applied, and practice has proved that the technology not only ensures the construction quality, but also shortens construction period.