小浪底大坝排水设计

排水设计是小浪底大坝设计的重要组成部分之一，其右岸排水幕长777m，左岸排水幕长1377m；排水幕体深度超过150m；排水幕水、下之间设两层排水洞；经过泥化夹层设有组合过滤体，长度达到70m，这样的规模在国内外工程中都是罕见的，结合这些特点，介绍了排水幕、排水洞及排水孔的设计。

Design of Water Drainage from Xiaolangdi Dam

Design of water drainage is one of important part for Xiaolangdi dam design. The length of drainage curtain is 777 m in right side, 1 377 m in left side, more than 150 m in depth, with two layers of discharge tunnels designed between the top and bottom of the drainage curtain which is 70 m long with compound filtration body in muddy intercalations. It is exceptional in both domestic and worldwide for water drainage curtain with such large scale. The designs of drainage curtain, discharge tunnels and de-watering holes are introduced in the paper combined with the characteristics mentioned above.