功果桥水电站下闸蓄水设计的特点与创新

Characteristics and Innovation of Reservoir Impoundment Design for Gongguoqiao Hydropower Station

功果桥水电站大坝高度105m,导流洞尺寸16m×18m,受下闸时机提前和枢纽布置影响,下闸蓄水存在诸多难点。下闸蓄水设计在后汛期划分、下闸流量和时机论证、导流洞特殊地段的稳定复核、利用下游围堰和大坝间基坑作为生态蓄水池进行生态放水等方面均有所突破,有效指导了现场工作,为工程下闸、安全蓄水提供了有力的技术支撑。下闸蓄水顺利完成,功果桥水电站提前发电,创造经济效益。

The dam height of Gongguoqiao Hydropower Station is 105 m,and the diversion tunnel size is 16 m×18 m.Affected by the closing timing of gate and the layout of the complex structures,the reservoir impoundment encounters great challenges.The design of the reservoir impoundment has made great progress in the post-flood period division,gate closing flowrate and timing demonstration,the stability review of specific section of the diversion tunnel,the use of the foundation pit between downstream cofferdam and the dam as ecological reservoir for ecological discharge.The design effectively guided the on-site work and provided strong technical support for the project in gate closing and reservoir impoundment.The reservoir impoundment was successfully completed,and the Gongguoqiao Hydropower Station was put into operation ahead of schedule to generate economic benefits.