Abstract

The use of complex piers to build bridges has become widespread. In this study the experimental data was obtained to determine scour hole's dimension and its changes versus pile cap elevation. Five models with different geometry were used in experiments under clear water condition and thresholds velocity. The models were made with an appropriate scale from real piers of bridges. A 3D illustration of the model for each experiment was drawn. The length, width and depth of the scour hole coordinates were measured in three directions. The results showed that similar to the scour depth, the scour length and width, apart from pier geometry, are significantly depended on the pile cap elevation. It was found that the variation in scour hole dimensions can be categorized into two cases as before and after pile cap undercutting. Moreover, the maximum length and width of the scour hole at each model were derived.

摘要

使用复杂的桥墩来建造桥梁已经变得普遍。在这项研究中，获得了实验数据以确定冲刷孔的尺寸及其随桩帽标高的变化。在清水条件和阈值速度下的实验中使用了五种不同几何形状的模型。这些模型是根据实际桥墩按适当比例制作的。绘制了每个实验的模型的 3D 插图。在三个方向测量冲刷孔坐标的长、宽和深。结果表明，与冲刷深度相似，冲刷长度和宽度，除了桥墩几何形状，显着取决于桩帽标高。结果表明，冲刷孔尺寸的变化可分为桩帽底切前后两种情况。而且，