青草沙水库下游水闸冲刷及辅助消能研究

Study on scouring and supplementary energy dissipation for sluice on lower reach of Qingcaosha Reservior

选用起动流速与天然沙的起动流速之比与流速比尺一致的模型沙,对建于砂质粉土上的青草沙水库下游水闸的消能冲刷进行了试验研究。比较选用了在消力池末端设齿坎的辅助消能方案,冲刷程度显著减轻,为优化低Fr数水闸的消能防冲设计提供了依据。

The model sand with the ratio between its incipient velocity and that of the natural sand being consistent with the ve- locity scale is selected for the experimental study on the scour from the energy dissipation for the sluice on the lower reach of Qincaosha Reservoir buih on sandy silt ; in which the scheme of the supplementary energy dissipation that arranging dentated sill at the end of the stilling pond is chosen through the comparisons concerned, and then the scouring is significantly alleviated and a good basis is also laid for the optimization of the design of the energy dissipation and anti-scouring for the sluice with lower Froude-mumber.