河南省唐河县三夹河大桥过洪能力影响分析  

Impacts of Sanjia River Bridge on flood conveying capacity in Tanghe County,Henan Province

作　　者：王晖[1] Wang Hui(North China University of Water Resources and Electric Power, Zhengzhou 45004)

机构地区：[1]华北水利水电大学,郑州450046

出　　处：《中国防汛抗旱》2018年第2期66-69,共4页China Flood & Drought Management

摘　　要：河南省唐河县三夹河大桥桥位河段属平原性冲积河道,比降平缓,冲淤演变复杂,通过借用平氏断面的演变,概括分析了河道的冲淤演变特性。结合河道断面资料,应用谢才—曼宁公式和壅水计算方法得到建桥前后断面水位—流量关系,分析研究了建桥前后河道的过洪能力。经过对比分析,大桥建成后桥位段主槽过洪能力减小,约是建桥前的2%;虽然桥轴线与河流方向有一定夹角,但墩形和结构的合理布局减小了桥墩对水流的横向控导;研究成果涉及交通及防洪安全等重大影响,其中的水力参数取值偏于安全,研究成果和方法思路可为河务部门和大桥设计部门提供技术参考和借鉴。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 ero- sion 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.

关 键 词：三夹河大桥 桥位河段 冲淤演变 壅水 过洪能力 

分 类 号：TV147[水利工程—水力学及河流动力学]