To reduce local scour around bridge piers, a mitigation measure requiring a submerged triangular flow diversion structure is proposed. Different dimensions, locations, and submergence ratios were examined experimentally. Using Taguchi’s method to minimize the number of alternative tests, 27 alternative tests were undertaken to ascertain the optimum size and location for the structure. Compared to the no flow diversion structure situation, it was found that the optimized structure resulted in a 40% reduction in the maximum scour depth and a 60% reduction in scour volume. Also, an experimental study of the flow field was conducted to investigate the influence of the structure on flows. Results showed that the structure influenced the down-flow and horseshoe vortex and consequently reduced the scour. Based on the investigation presented herein, a flow diversion structure is a simple and easy approach for mitigation of scour at existing and new bridges.

为了减少桥墩周围的局部冲刷，提出了一种需要水下三角导流结构的缓解措施。通过实验检查了不同的尺寸、位置和淹没率。使用田口的方法尽量减少替代测试的数量，进行了 27 次替代测试以确定结构的最佳尺寸和位置。与无分流结构情况相比，发现优化后的结构最大冲刷深度减少了40%，冲刷量减少了60%。此外，还进行了流场的实验研究，以研究结构对流动的影响。结果表明，该结构影响了下流和马蹄形涡流，从而减少了冲刷。根据本文介绍的调查，