In this paper analyzed are the distribution and the cause of formation of educts in the Shitang Dam stilling basin and the influence of the educts on drainage effect.

• 分析了石塘大坝消力池廊道析出物的分布、成因及对排水效果的影响,介绍了通过扫孔处理使排水孔恢复良好排水效果的方法,以及扫孔后的效果。