【摘要】 为了研究黄河下游河道采用重复组装式导流桩坝导流的效果,以实现控制黄河下游河道畸形河势的目的,以不透水管桩坝为研究对象,采用动床模型试验方法,分析了不透水桩坝在不同洪水条件下(流量Q=800、4 000、8 000、12 000 m~3/s)的流速分布、主流线的形态和顶冲点的位置。结果表明:随着洪峰流量的增大,河道断面流速增大,水流的顶冲位置逐渐向下移动,主流贴近管桩坝;不透水管桩坝能够对黄河下游河道的小水河势起到很好的控导作用。更多还原

【Abstract】 Absract:In order to study the diversion effect of repeatedly assembled diversion pile dam in the lower Yellow River and to control the abnormal river regime in the lower Yellow River, the paper took an impervious pipe pile dam as the research object and adopted the method of moving bed model test to analyze the velocity distribution and the shape of the main flow line of the impervious pile dam under different flood conditions(Q=800, 4 000,8 000 and 12 000 m~3/s)and the position of top wash. The results show that with the increase of peak discharge, the velocity of the river section is increased, and the top scour position of the flow is gradually moved downward and the main flow is close to the pile dam. The impervious pipe pile dam can control and guide the river regime of the lower Yellow River.更多还原