高重力坝坝面分流消能工的模型试验研究

为了解决宽尾墩应用于高重力坝时经其拉伸后的水流在入水时纵向集中的问题，提出了一种坝面分流消能工，通过模型试验的方法研究了反弧段和消力池内的水力特性。结果表明，坝面上间隔布置渐扩挑坎，在挑坎之间形成窄缝，能使坝面上的水流一部分经挑坎以挑流的形式进入消力池靠近中部的区域消能，而另一部分水流继续流经坝面，由挑坎之间的窄缝沿竖向拉伸后进入消力池的前部消能，能达到分散分区消能的效果。这种布置型式水流的拉伸效果良好，利用消力池更广的区域进行消能反弧段和消力池的压强均较小。

Model Test Study on Split flow Energy Dissipator of High Gravity Dam Surface

This article describes a split flow energy dissipater of high gravity dam surface in order to solve the problem of vertical concentration of water when the flaring gate pier is applied to the high gravity dam. Hydraulic model tests were used to study the hydraulic characteristics of dam surface and stilling pool. The results show that when buckets were arranged on the dam surface, the slit is formed between the buckets so that part of the water of the dam surface portion flow into the middle of stilling pool through bucket. Another part of the water longitudinally stretched by the narrow ridge between picks will continue to flow over dam surface enter the first half of stilling pool, and it can achieve the effect of dispersion energy dissipation. This structure has better straightening effect and makes use of more part of the stilling pool for energy dissipation. So, the pressure of stilling pool and arc segment are small.