波流作用下单桩结构局部冲刷试验研究

Experimental study on local scour of single pile under the wave and current

单桩结构引起的局部冲刷不能忽视,需要对单桩结构的冲刷规律进行研究。本文利用系列模型延伸法进行波流作用下单桩局部冲刷试验研究,流态发现波流共同作用时,在单桩结构处形成"漩涡状圆环"褶皱,绕过单桩结构后,圆环向两侧发散。局部冲刷试验表明冲刷形态与动力特征一致。极端高水位条件下,最大冲刷深度为5.10m,冲刷深度-2.00m以上范围最远在单桩中心约6.50m半径周围,横向约12.00m,纵向约9.00m。

The local scour caused by single pile structure cannot be neglected, so it is necessary to study the scour law of single pile structure. In this paper, a series of model extension method was used to study the local scouring of single pile under the action of wave and current. When the interaction of flow and wave was found, the ＂swirl ring＂ folds were formed at the single pile structure, diverging to both sides. Local scour experiment shows that erosion forms in accordance with dynamic characteristics. At extreme high water level, the maximum scour depth is 5.10m, the scour depth is -2.00m, the farthest is about 6.50m in the center of the pile, about 12.00m in the horizontal direction and about 9.00m in the longitudinal direction.