叶巴滩水电站导流洞布置方案优选研究

Study on optimization of diversion tunnel layout for construction of Yebatan Hydropower Station

基于叶巴滩水电站高拱坝工程地形地质条件、枢纽布置、施工等特点,对其导流洞布置方案进行了优选。通过全面的经济技术分析,对初拟的等断面双洞布置方案、大小导流洞布置方案、单洞布置方案进行比选,并进一步优选导流洞洞径。结果表明,等高程等断面分岸布置的导流洞布置方案较优,为高拱坝导流洞布置方案的设计及优选提供借鉴。

Based on the characteristics, such as the topographic and geological conditions, project layout, construction, etc. , of the high arch dam for Yebatan Hydropower Station, the scheme for the layout of its diversion tunnel is optimized. Through an overall economic and technical analysis, a comparative selection is made among the preliminarily planned schemes, i.e. the lay- out of an equal-section dual-tunnel, the layout of a large tunnel with small one and the layout of a single tunnel, while the diam- eter of the diversion tunnel is further optimized. The result shows that the scheme of the layout of equal-elevation and equal-sec- tion diversion tunnels arranged on both the banks is more optimal, thus provides a reference for both the design and optimization of the layout scheme for the diversion tunnel of the high arch dam.