高含沙水流挟沙力公式的探讨

Discussion on Formula for Load Carrying Capacty of High Sediment Concentration Water Flows

本文通过对高含沙水流挟沙特性分析,认为高含沙水流的挟沙力与其流变特性有关,对宾汉体而言,可用流变参数τ_B和η加以代表,并将Re/Rem无因次项引入到挟沙力公式中去。最后,在天然资料与室内试验资料基础上获得了高含沙水流与低含沙水流统一的挟沙力公式,取得了满意的效果。

This paper believes that, based on the results of load carrying capacity of the water flow with high sediment concentration, the load carrying capacity of water flow with high sediment concentration is a function of the rheologic properties. For Bingbam fluid, the rheologic parameters τ_8 and n can be used and the nondimentional factor's Re/Rein be put into the formula for load carrying capacty. Finally, based on the information obtained from the natural rivers and the labouratary experiments, a new formula for load carrying capacity of flow with a high sediment concentration is given. The new formula can be applied either to the flow with high sediment concentration or to that with normal sediment concentration. The results are satsfactory.