桥涵拓宽水动力数值分析  

Numerical Analysis on Hydrodynamic Force in Bridge and Culvert Widening

作　　者：李东风[1] 谢华伟[1] 聂会 

机构地区：[1]浙江水利水电学院水利与环境工程学院,浙江杭州310018 [2]浙江水利水电学院科技处,浙江杭州310018

出　　处：《浙江水利水电学院学报》2016年第3期14-17,共4页Journal of Zhejiang University of Water Resources and Electric Power

基　　金：国家自然科学基金资助项目(51039003);浙江省自然科学基金资助项目(M503254)

摘　　要：路桥过水涵洞是连接道路两侧的河网的重要水道,拓宽桥涵宽度工程会对河流水位有一定影响.通过建构河网平面二维数学模型,计算出桥涵附近河网水流的流速和水位等水动力要素,分析了河网的水流运动,通过分析桥涵拓宽前后水位的变化、水位差的变化和桥涵上游分河段的比降,计算出桥涵拓宽对水位的最大降低值为0.028 m,对桥涵上游的影响范围为450 m.该结论可为河流治理施工提供一定依据.Water culvert is an important channel connecting roads on both sides of the river network, and the widening engi- neering of bridges and culverts has a certain influence on river level. By the construction of two-dimensional mathematical model for river network, the dynamic factors, such as river flow velocity and water level near the bridges, are calculated. Based on the analysis on flow movement, the change of water level, as well as the change of water level difference before and after the widening construction of bridges and culverts, and the sectional gradient upstream the bridges are also analyzed. The study shows that the widening of bridges works on the water level by the maximum reducing value of 0. 028 m, and the influence on the section upstream the bridges by 450 m, which provides certain basis for river management and construction.

关 键 词：桥涵拓宽 数值模拟 水位 流速 

分 类 号：TV131.2[水利工程—水力学及河流动力学]