水电站引水渠道上的涡管排沙工程

当渠道中的水流切向冲入涡管时产生的螺旋流会把落入涡管中的推移质泥沙颗粒卷扬起来，形成悬移质，而水流输送悬移质的能力远大于输送推移质的能力。作者利用此原理进行了水电站引水渠道上的涡管排沙设计，实践证明，该方法简单可行，排沙率高，造价低廉，有推广价值。文章介绍了涡管排沙的原理、实验结果、设计要点以及实例。

On the Spiral Pipe Sediment Release Work in the Water Diversion Canal of a Hydro-Power Station

The suspended load can be formed while canal flow is shearing and scouring into the spiral pipe and the bed load sediment is rolling up by the screw flow. The suspended load transfering capacity of flow is much greater than the bed load capacity. The principle is used by author for design the spiral pipe sediment release work in the water diversion canal of a hydro-power station. The practice has proved that the measure is simple and feasible, high rate of sediment release, low cost and worth to spread. The principle of spiral pipe sediment release, experiment results, design guide and case study have been introduced in this paper. )