桥墩群阻水对河道水动力的影响研究  

Study on Influence of Backwater Affected by Pier Group on Hydrodynamics in River Channel

作　　者：赵苏磊[1] 陆炀[1] 张松 房树财 戴文鸿[1,4,5] 

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]扬州市勘测设计研究院有限公司,江苏扬州225007 [3]云南大唐国际李仙江流域水电开发有限公司,云南普洱665000 [4]水文水资源与水利工程科学国家重点实验室,江苏南京210098 [5]河海大学水资源高效利用与工程安全国家工程研究中心,江苏南京210098

出　　处：《人民黄河》2015年第5期42-44,48,共4页Yellow River

基　　金：国家自然科学基金资助项目(51239003;51479071);江苏省自然科学基金面上项目(BK2012808);江苏高校优势学科建设工程资助项目(YS11001);教育部高等学校学科创新引智计划项目(B12032);河海大学大学生创新创业训练项目(2014102941073)

摘　　要：桥梁等涉河建筑物的修建使河道过水断面压缩,桥位附近流速加大、流态紊乱,在一定范围内导致水位壅高、局部冲刷等问题。应用平面二维水沙数学模型,模拟漯河市京广铁路桥附近的水动力变化以及沙河的河势变化,并在此基础上模拟下游300 m处将要建设的解放路沙河大桥建成后带来的累积影响,就河道壅水以及河势变化等问题进行探讨。结果表明:在下游桥梁的壅水范围内,上游桥梁前方的壅水值比单座桥梁时偏大,上游桥梁前方的流速值有所减小。Bridge and other river - related constructions compress the river cross - section, increase flow velocities and cause flow turbulent around piers, and also lead to backwater and local sour. In this paper, a two -dimensional mathematical model was applied to simulate the hydrodynamics around piers near the Beijing - Guangzhou Railway Bridge and the change of regime trend of Shahe River. This paper also simulated the cumulative influence caused by Shahe Bridge which is about to constructed 300 m downstream of the Bejiing - Guangzhou Rail- way Bridge. Meanwhile, the effect of backwater and the evolution of river regime were also demonstrated. The results indicate that, within the impact region of the downstream bridge, the backwater in front of the upstream bridge is larger than that in the case of only one bridge exists, while the flow velocity is smaller than that in the case of only one bridge exists. The study can help to predict the flow field and water surface around the bridge piers, and can make suggestions to bridge and pier designs.

关 键 词：桥墩群 累积影响 桥前壅水 数学模型 漯河市沙河大桥 

分 类 号：TV131[水利工程—水力学及河流动力学]