弧形短导航墙对船闸下游引航道内水流结构的影响

通过物理模型试验,结合理论分析,研究了在不同下游水深条件下,直导航墙长度L变化对船闸下游引航道保护长度的影响,并在此基础上研究了增设弧形短导航墙对水流结构的调整与影响。物理模型试验研究表明:直导航墙长度的增加有利于改善船闸引航道口门区的通航条件,但在达到一定长度之后,再增加直导航墙长度对引航道口门区水流结构的改善效果减弱;弧形短导航墙对改善下游引航道保护区域内水流结构有很好的效果,选用较小纵向参数a和较大横向参数b效果更好,但张角不宜过大。

Influence of Arc-shaped Short Navigation Wall on Flow Structure in Downstream Approach Channel of Shiplock

The influence of changing the length of straight navigation wall on the approach channel downstream of shiplock in the presence of varied downstream water depth is investigated via physical model experiments together with theoretical analysis. On this basis, the influence of adding arc-shaped short navigation wall on flow structure is also examined. Increasing the length of straight navigation wall is beneficial to improving the navigation condition in the entrance area of the approach channel; after reaching a certain length, however, such improvement weakens. Arc-shaped short navigation wall has a good effect on improving the flow structure in the protected area of the downstream approach channel. Small longitudinal parameter “a” and larger lateral parameter “b” have better effect; but the opening angle should not be too large.