Under a flow in supercritical regime, depending on the pier width to water depth ratio, the flow pattern around a bridge pier can take the form of a wall-jet-like bow wave or a detached hydraulic jump. The present work aims at analysing the maximum scour depth at piers in both flow patterns. A dedicated experimental set-up was used to produce the live-bed scour experiments, varying the inflow velocity and pier diameter. During the experiments, scour developed very rapidly, achieving equilibrium conditions after few minutes. No major differences between the maximum scour depth in the wall-jet-like bow wave and detached hydraulic jump cases were observed. Measured scour depths were of comparable magnitude and followed similar tendencies with controlling parameters as in subcritical flows. Scour formulas for piers in subcritical flow thus achieve a good accuracy in prediction of maximum scour depth at piers in supercritical flows.

在超临界状态下，根据桥墩宽度与水深的比例，桥墩周围的流动模式可以采取壁射流状弓波或分离水跃的形式。目前的工作旨在分析两种流动模式下码头的最大冲刷深度。使用专门的实验装置进行活床冲刷实验，改变流入速度和桥墩直径。在实验过程中，冲刷发展非常迅速，几分钟后达到平衡状态。没有观察到壁射流式弓形波的最大冲刷深度和分离的水力跳跃情况之间的重大差异。测得的冲刷深度具有可比性，并遵循与亚临界流控制参数相似的趋势。