新坑水电站抛物线双曲拱坝设计  

Optimization design of parabolic double-curved arch dam of Xinkeng Hydropower Station

作　　者：吕剑 田友文 

机构地区：[1]贵州省铜仁市水利电力勘测设计院,贵州铜仁554300

出　　处：《人民长江》2017年第10期65-68,共4页Yangtze River

摘　　要：贵州省德江县新坑水电站双曲拱坝建在不对称"V"形狭谷中,经过圆弧形、抛物线和对数螺旋线双曲拱坝的技术经济比较,最终择优选择了等厚抛物线双曲拱坝。有闸控制溢洪道采用半圆城门拱支撑、闸孔收缩、闸墩等厚呈径向的布置形式,使坝体结构得到全面优化。上述优化使拱坝结构的特点得以充分发挥,溢洪道布置适应地形条件好,工程投资大大降低。对大坝体形选择、体形设计和溢洪道结构设计作了详细叙述,可为在泄流量大、河谷狭窄的地形建设拱坝提供借鉴。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 doublecurvature 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 prorides experiences for building arc dam in narrow river valley with large flood discharge.

关 键 词：体型设计 抛物线双曲拱坝 闸孔收缩 新坑水电站 

分 类 号：TV642.4[水利工程—水利水电工程]