弯曲河道上底流消能工布置试验研究

Experimental Research on the Layout of Underflow Energy Dissipator in Curved River

传统的底流消能工常布置在顺直河段,针对受实际条件限制必须在弯曲河道上布置底流消能工的技术难题,基于某水库工程的物理模型进行了试验对比研究。试验结果表明,所提出的主、辅两级消力池与导流消力墩这一消导结合的消能工结构在弯道段水流流态、消力池回流强度、弯道段坡脚冲刷强度等水力指标方面均优于传统直线型消力池布置方案和曲线型跌坎消力池布置方案,解决了弯曲河道段布置底流消能工的技术难题。

As a basic type of energy dissipation, underflow energy dissipation is commonly used in general sluices, medium and small overflow weirs or various discharge structures under poor geological conditions.Traditional underflow energy dissipaters are usually located in the straight reaches.Aiming at the technical problem that the underflow energy dissipaters have to be arranged in curved reaches due to the actual conditions, a comparison is made on the physical model test of a reservoir project, and in this project the above-mentioned technical problem is solved by the proposed energy dissipation structure of the main and auxiliary stilling basins with diversion- baffle piers.The test results show that the energy dissipater structure proposed in this paper is superior to the traditional linear stilling basin and the curved stilling basin layout schemes in terms of flow regimes, backflow intensity and slope erosion intensity.