桥梁是高速公路跨越河流的主要形式,在高速公路工程中桥梁工程占了较大的比重,而水文调查计算在桥梁设计中是极其重要的工作,水文计算的正确与否对桥梁规模影响非常大,甚至会对桥梁安全产生重大影响。本文结合甘肃省平天高速公路水文计算,以实际工程项目为基础,对大中桥水文计算的方法以及计算过程进行论述。 Bridges are the main form of expressway crossing rivers. In highway engineering, bridge engineering accounts for a large proportion, and hydrological survey calculation is extremely important in bridge design. Whether hydrological calculation is correct or not has a great influence on bridge scale , And even have a significant impact on bridge safety. In this paper, hydrological calculation of Pingtian Expressway in Gansu Province is carried out. Based on the actual project, the hydrological calculation method and calculation process of Dazhongqiao are discussed.