Abstract：Sanjia-River Bridge in Tanghe County,Henan Province is located on a waterway flowing through an alluvial plain with a gentle gradient,and the evolution of erosion and deposition is extremely complicated. Characteristics of channel erosion and deposition are generalized by using the evolution of plane section. According to the waterway data,the Chezy and Manning formula and backwater calculation method are used to obtain the relation of the stage and discharge and analyzed the flood capacity before and after constructing the bridge. The comparative result shows that the flood conveying capacity of the major channel in the bridge area is decreased about 2% after the construction of the bridge;Although there is a angle between the axis of the bridge and the flow direction of the river, the axis of the pier parallels the flowing direction of the river,thus reducing the lateral control of the pier which is in the flow. The study results are important to transportation and flood control safety and provide technical reference for the river management and bridge design department.
王晖. 河南省唐河县三夹河大桥过洪能力影响分析[J]. 中国防汛抗旱, 2018, 28(2): 66-69.
Wang Hui. Impacts of Sanjia River Bridge on flood conveying capacity in Tanghe County, Henan Province. journal1, 2018, 28(2): 66-69.
2018, Vol. 28 
