Influence of Wood Debris Accumulation on Bridge Pier Scour
Influence of Wood Debris Accumulation on Bridge Pier Scour
复制标题
木屑堆积对桥墩冲刷的影响
DOI：
10.1061/(asce)hy.1943-7900.0000289
复制
发表时间：
2011
影响因子：
2.4
通讯作者：
I. Carnacina
中科院分区：
文献类型：
--
作者：
S. Pagliara;I. Carnacina
本文论述了碎石堆积对桥墩周围冲刷的影响。对长方形、三角形和圆柱形三种形状的木屑进行了不同水力条件下的清水试验。为了确定碎石厚度和宽度对最大冲刷坑深度随时间演变的影响，研究了不同的碎屑厚度和宽度。桥墩直径与槽宽之比在0.05~0.12之间变化，桥梁总收缩可达20%。提出了一种预测冲刷深度增加的简单设计方法，该公式主要取决于泥石流堆积引起的水流收缩。
This note deals with the influence of debris accumulation on scour around bridge piers. Clear-water experiments in different hydraulic conditions have been carried out with three wood debris shapes: rectangular, triangular, and cylindrical. A wide range of debris thickness and width were studied in order to determine their influence on the maximum scour hole depth temporal evolution. The ratio of the pier diameter to the channel width was varied between 0.05 and 0.12 with total bridge contractions up to 20%. A proposed relation presents a simple design procedure to predict the increase in scour depth, which mainly depends on the flow contraction due to the debris accumulation.