商合杭铁路芜湖长江大桥通航条件及水动力影响试验研究

摘要

When the local boundary conditions of the channel are changed causing by the natural or human factors,the flow dynamic will change correspondingly,and it will cause a further adjustment of the riverbed.After the construction of the bridge,hydrodynamic conditions are also changed within a certain range,and the adjustment of local riverbed erosion and deposition will occur, which will bring a certain degree of influence on navigation condition of engineering reach.Taking the construction of the Wuhu Yangtze river bridge in the Shang-He-Hang railway for example,by using the established physical model, the hydrodynamic characteristics at the bridge site was analyzed in this paper,and the influence of bridge construction on the flow dynamic and navigation condition of engineering reach was simulated.Combining with the optimization scheme test, the influence of navigation condition and adaptability analysis of the scheme were also discussed.It provides reference for bridge design.%当河道受到自然或人为因素影响而改变局部边界条件时,水流运动将会发生变化,并进一步引起河床的冲淤调整.桥梁兴建后在一定范围内会造成水动力条件改变,引起局部河床冲淤调整,对工程河段通航条件带来一定程度的影响.以商合杭铁路芜湖长江大桥的兴建为例,利用建立的物理模型,对桥址河段水流运动特性进行试验分析,模拟建桥后对工程河段水动力及通航条件的影响.结合试验对桥式方案进行优化,对方案通航条件的影响及适应性进行了分析,为桥梁设计提供参考.