关键词: 体型设计, 抛物线双曲拱坝, 闸孔收缩, 新坑水电站

Abstract: Xinkeng double-curved arch dam is located in the asymmetric "V" shaped valley in Dejiang County, Guizhou Province. Through technical and economic selection among the arc, parabola, logarithmic spiral double curvature arch dams, the parabolic double-curvature arch dam with equal-thickness was adopted. The spillway with gate controlling is characterized as U-shaped gate support, narrowing sluice hole and equal thickness sluice piers with radial collocation. This optimized layout can fully play the arch structure advantage, and gives the spillway a good adaption to the terrain, greatly reducing the engineering investment. We give a detailed description to the dam body shape selection, shape design and spillway structure design, which provides experiences for building arc dam in narrow river valley with large flood discharge.

Key words: shape design, parabolic double curvature arch dam, gate shrinkage, Xinkeng Hydropower Station