海潮影响下低水头水闸消能结构优化研究

低水头水闸下游消能属于低弗劳德数水跃消能,容易发生波状水跃、消能不充分等消能问题,尤其在海潮影响下,水位变幅大,消能问题更加突出。为此,结合晋江滨海新区填海造地工程~#1水闸模型试验,针对原设计一级消力池容易形成波状水跃和消能率低的问题,提出了二级消力池的消能结构,并对消力池池长、池深、尾坎高程和辅助消能措施进行了综合优化。结果表明,优化后的二级消力池消能结构,改善了水流流态,提高了消能率,研究结果可为类似工程借鉴参考。

Optimization Experimental Study on Energy Dissipation Structure of Low-head Sluice under Influence of Tide

The energy dissipation in the downstream of low-head sluice is a kind of low-Fr number water jump energy dissipation, which is prone to produce the problem of wavy hydraulic jump and insufficient energy dissipation and so on. Especially under the influence of the tide, the energy dissipation problem is more prominent. According to the model test of #1 sluice reclamation project in New Area of Binhai in Jinjiang City, the energy dissipation structure of the two-stage stilling pool was put forward on the basis of the primary design of the stilling basin, which is easy to form wavy hydraulic jump and low energy dissipation rate. And then the length, depth, tail elevation of stilling basin and auxiliary energy dissipation measures were optimized. The results show that the optimized energy dissipation structure of two-stage stilling basin can improve the flow pattern and improve the energy dissipation rate. Thus, the research results can be referenced by similar projects.