Laboratory data for local scour depth regarding the size of wide piers are presented. Clear water scour tests were performed for various pier widths (0.06, 0.076, 0.102, 0.14 and 0.165 m), two types of pier shapes (circular and rectangular) and two types of uniform cohesionless bed sediment ( d 50 = 0.23 and d 50 = 0.80 mm). New data are presented and used to demonstrate the effects of pier width, pier shape and sediment size on scour depth. The influence of equilibrium time ( t e) on scouring processes is also discussed. Equilibrium scour depths were found to decrease with increasing values of b/d 50. The temporal development of equilibrium local scour depth with new laboratory data is demonstrated for flow intensity V/V c = 0.95. On the other hand, the results of scour mechanism have shown a significant relationship between normalized volume of scoured and deposited with pier width, b . The experimental data obtained in this study and data available from the literature for wide piers are used to evaluate predictions of existing methods.
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机译：给出了有关宽墩尺寸的局部冲刷深度的实验室数据。对各种码头宽度（0.06、0.076、0.102、0.14和0.165 m），两种类型的码头形状（圆形和矩形）和两种均匀的无粘性床层沉积物（d 50 = 0.23和d 50 = 0.80毫米）。提出了新的数据并用于证明墩宽，墩形和沉积物尺寸对冲刷深度的影响。还讨论了平衡时间（t e）对精练过程的影响。发现平衡冲刷深度随b / d 50值的增加而减小。利用新的实验室数据证明了平衡局部冲刷深度随时间的发展，流动强度V / V c = 0.95。另一方面，冲刷机理的结果表明，冲刷和归一化的规范化体积与桥墩宽度b之间存在显着的关系。在这项研究中获得的实验数据以及可从文献中获得的宽墩数据可用于评估现有方法的预测。
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