锦潭水电站设计中的几个关键问题

Key problems in design of Jintan Hydropower Station

锦潭水电站所在位置河谷狭窄,坝址地形地质条件复杂,存在拱坝布置选择余地小、体形优化设计约束条件多、坝肩开挖设计与坝基处理难度高等关键问题。为克服上述难题,在设计中采取了在设计地形和实际地形有差异情况下进行体形调整、设置放空底孔、重视坝体横缝附近的混凝土质量等主要技术措施,并总结了设计过程中的经验教训,总体来说,锦潭水电站设计取得了较好的效果。

The site of Jintan Hydropower Station is situated at a narrow river valley with a complicated topographical and geological condition, so some key problems are there for the construction of an arch dam such as a less space for the selection of dam layout, more restrictive conditions for the shape optimal design of the dam and higher difficulty for both design of the abutment excavation and the treatment of the dam foundation etc.. To solve these problems, the main technical measures of adjusting the dam shape, arranging the bottom discharge outlet and paying a great attention to the concrete quality near the transverse construction joints of the dam body etc. are adopted in the design under the condition that larger discrepancy is there between the topography for design and the actual topography, moreover, both the experiences and lessons are summarized. On the whole, better effect is obtained by the final design concerned.