跨河桥梁壅水的水面线计算法与经验公式计算法的比较分析  

Comparative analysis of the calculation method and empirical formula calculation method for the backwater surface line of river-crossing bridge

作　　者：贺新华 蔡勇斌 蔡晓鸿 HE Xinhua;CAI Yongbin;CAI Xiaohong(Water Conservancy Bureau of Lianhua County of Jiangxi Province,Lianhua,Jiangxi,337100,China;Ji′an Municipal Water Resources Bureau,Ji′an,Jiangxi,343000,China)

机构地区：[1]江西省莲花县水利局,江西莲花337100 [2]江西省吉安市水利局,江西吉安343000

出　　处：《江西水利科技》2022年第6期401-406,共6页Jiangxi Hydraulic Science & Technology

摘　　要：采用天然河道恒定渐变流能量方程推导了桥梁壅水计算常用经验公式,论证分析了水面线计算法与常用经验公式计算法的适用条件及其精度差异,从理论层面对常用3个经验公式的计算精度做了比较分析,提出了跨河桥梁涉河工程建设方案壅水最大高度这一重要指标的控制限值,对跨河桥梁建设造成壅水超限值河段的堤防工程,提出了工程措施建议。The empirical formulae for bridge congestion calculation are derived by using the constant asymptotic flow energy equation of natural rivers,the applicability conditions and accuracy differences between the water surface line calculation method and the commonly used empirical formulae are demonstrated and analyzed,the calculation accuracy of the three commonly used empirical formulae is compared and analyzed from the theoretical level,the control limits of the important index of the maximum height of congestion of river-related construction programs of cross-river bridges are proposed,and engineering measures are suggested for the embankment projects in which the congestion of river sections exceeds the limits due to the construction of river-crossing bridges.

关 键 词：跨河桥梁 壅水高度 水面线 经验公式 

分 类 号：TV133[水利工程—水力学及河流动力学]