伊河中下游新建跨河桥梁对河床冲淤的影响

Influence of Newly Built River-Crossing Bridge on the Lower Yihe River on Riverbed Erosion and Siltation

陆浑水库是伊河关键性控制工程,对伊河下游洪水发挥着调控作用。近年来,伊河中下游河道修建了许多跨河桥梁。以龙门镇附近新修跨河桥梁为例,分析了桥梁修建对所在河段河床冲淤演变产生的影响。结果表明,在伊河河道修建跨河桥梁会对桥位附近河道冲刷以及水位升高产生一定的影响,还可能引起河势的局部调整;多座桥梁还会对河床演变产生累积效应。

Luhun Reservoir is a key control project of the Yihe River,which plays an important role in controlling floods in the lower reaches of the Yihe River.In recent years,many river-crossing bridges have been built on the middle and lower reaches of the Yihe River.Taking a newly built river-crossing bridge near Longmen Town as an example,this paper analyzed the influence of bridge construction on the riverbed erosion and siltation evolution of the river reach where the bridge is located.The results show that the construction of the river-crossing bridge in the river course of Yihe River will have some influence on the erosion of the river course near the bridge site and the rise of the water level and may also cause local adjustment of the river regime.Several bridges will also have cumulative effects on the riverbed evolution.