Bridge pier scour is a complex process, which is influenced by many parameters, including the presence of ice cover around piers. To better understand the influence of ice on bridge pier scour, an artificial ice cover, equipped with either a smooth or a rough surface, was constructed and tested experimentally. The ice cover was positioned on the surface of the water and submerged to specified depths in order to replicate floating and fixed (pressurized) ice cover conditions, respectively. During each test, a velocity profile was collected beneath the ice cover, and after each test, a three-dimensional scan of the bed was collected to compare the resulting scour. It was discovered that the presence of an ice cover around a bridge pier increased pier scour under all conditions. Furthermore, as the ice cover was submerged deeper into the flow, the flow velocity increased, and greater scour resulted. For each level of submergence, the rough ice cover yielded increased scour depths compared to the smooth ice cover.

中文翻译：

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冰盖下的桥墩冲刷

桥墩的冲刷是一个复杂的过程，受许多参数的影响，包括墩周围是否有冰盖。为了更好地理解冰对桥墩冲刷的影响，构造并配备了具有光滑或粗糙表面的人造冰盖并进行了实验测试。将冰盖放置在水面上并浸入指定深度，以分别复制浮动和固定（加压）冰盖条件。在每次测试期间，在冰盖下收集速度分布图，并且在每次测试之后，收集床的三维扫描图以比较冲刷情况。人们发现，在所有情况下，桥墩周围都存在冰盖，这会增加桥墩的冲刷量。此外，随着冰盖更深地浸入流中，流速增加，冲刷量增加。对于每个浸没水平，与光滑的冰盖相比，粗糙的冰盖会增加冲刷深度。