摘要
随着我国经济的快速发展,跨江河桥梁日益增多,局部河段受地形限制,在较短河道内建设众多桥梁,形成桥群,使得桥墩周围水流结构发生显著变化,进而影响河床和桥墩的冲刷过程。本文以乌龙江大桥桥群布置为例,采用概化模型试验的方法,研究各桥建设对水流和冲刷特征的影响,研究结果表明:其它桥墩布置与乌龙江大桥(公路桥)桥墩成对口布置,降低了乌龙江大桥(公路桥)桥墩附近流速,减少了桥墩局部冲刷深度,但桥孔中间的流速则略有增大,冲刷深度有所增加。
With the rapid development of economy, cross-river bridges are on the rise, local channel is restricted by terrain, many bridges will be built in the short reach,the piers of these bridges make great changes in the flow structure around them, and then affect the erosion of riverbed and pier. According to the arrangement of Wulongjiang bridge-group, using the generalized model test, study the variation characteristics of water flow and bed erosion of the bridge construction, the results show that the other bridge pier is arranged with the bridge pier of wulong river bridge(road bridge), can reduce the flow velocity near Wulongjiang river bridge( highway bridge piers) and the local scour depth, but in the middle of the bridge, the flow rate increases slightly, scour depth increases, can be a reference for similar projects.
出处
《现代交通技术》
2017年第6期27-29,共3页
Modern Transportation Technology
关键词
乌龙江
大桥
桥墩
流态
冲刷
Wulongjiang river
bridge
scour
flow pattern
