锦屏一级水电站枢纽总布置

General layout of Jinping I Hydropower Station

锦屏一级水电站为雅砻江梯级水电开发的控制性工程,大坝采用双曲拱坝型式,为世界第一高拱坝。在坝址选择时,分别研究比较了4个坝址,最后选定了普斯罗沟坝址。在充分考虑坝址区地质条件,泄洪建筑物水头高、泄量大、河谷窄,地下引水发电系统洞室规模大、技术难度大的情况下,选定了枢纽布置方案。最终选定的枢纽布置方案为:混凝土双曲拱坝,坝身4个表孔+5个深孔+2个放空底孔+坝后水垫塘与右岸1条有压接无压泄洪洞及右岸地下厂房。详细介绍了锦屏一级水电站枢纽布置情况及其优点。

Jinping I Hydropower Station is the controlling project for cascade hydropower development of the Yalong River,its dam is double-curvature arch and the highest one in the world.In the dam site selection,4 dam sites was compared,at last,the Pusiluogou dam site was determined.After full consideration of geologic condition at dam site,high water head of large flood discharge structure,narrow river valley,large underground cavities and technologic difficulties of underground power generation system,the project arrangement scheme was determined.The final scheme is concrete double-curvature arch dam,4 surface holes + 5 deep holes + 2 bottom outlets + plunge pool,and a flood discharge tunnel with pressure flow section connected to free flow section and underground power house on right bank.This paper introduces the project layout and its advantages of Jinping I Hydropower Station.