大湾水电站工程枢纽布置设计研究

Study On Project Layout Design of Dawan Hydropower Station

大湾水电站采用建在河床冲积层上的面板堆石坝挡水,左岸布置开敞式溢洪道,右岸布置泄洪冲沙(兼导流)洞和引水发电系统,厂房根据河道流向采弯取直增加水头,布置于右岸下游河滩。在可研及施工图阶段,随着建设条件的变化,对坝型、装机规模、消能工型式等工程布置进行了深入论证和研究,结合大湾电站地形、地质情况,最终选定枢纽布置型式,工程技术设计合理,建设条件利用较好,运行安全。

Dawan Hydropower Station adopts the face rockfill dam built on the alluvium of the river bed to retain the water, the left bank is equipped with open spillway, the right bank is equipped with flood discharge and sand flushing tunnel and water diversion and power generation system. The power house is arranged in the downstream beach of the right bank according to the flow direction of the river to take the straight increase of the water head. At the initial stage of feasibility and construction stage, with the changes of construction conditions, the project layout such as dam type, installation scale and energy dissipator type are intensive studied. Combined with the topography and geological conditions of Dawan Hydropower Station, the final layout type of the hub has been selected, the engineering technology design is reasonable, the construction conditions are well used, and the operation is safe.