下汤新建沙河大桥为国道G311徐西线公路的重点控制性工程,本文通过水文分析计算,桥梁壅水、河道冲刷等计算,对大桥的防洪能力及大桥建成之后河道的演变趋势、冲淤变化进行了分析,提出了评价结论和如何消除或减小影响的建议。 Under the new soup Shahe Bridge State Road G311 Xu West Line key control project, this paper through hydrological analysis and calculation, bridge water, river erosion calculation, the flood control capacity of the bridge and the bridge after the completion of the evolution trend of the river, erosion and deposition changes Conducted an analysis, put forward suggestions to evaluate the conclusion and how to eliminate or reduce the impact.