摘要
针对河道内布置有较长路基跨河桥梁的壅水计算,以潮白河上京哈高速公路为例,分别采用二维、一维数学模型以及常用的经验公式等不同方法计算壅水,分析各方法对于长路基桥梁壅水计算的适用性。结果表明,二维和一维模型能较真实地模拟河道断面形态以及桥梁布置,计算结果较为准确。各经验公式中,《水力计算手册》公式计算结果相对偏小,与模型计算结果最为接近;《铁路工程水文勘测设计规范》公式、陆浩公式、李付军公式计算结果均较小,不能完全反映壅水影响;Henderson公式计算结果远超模型成果。研究成果为长路基跨河桥梁的壅水计算及验证方法提供了依据和参考。
Focusing on the backwater calculation for cross-river bridges with long roadbeds within the river channel,the Jingha Expressway bridge over the Chaobai River was taken as an example in this study.The different methods—including 2D and 1D mathematical models and common empirical formulas—were employed to calculate the backwater and the applicability of each method for long-roadbed bridges was analyzed.The results indicated that the 2D and 1D models could accurately simulate the river section morphology and bridge layout,yielding relatively precise results.Among the empirical formulas,the result from the"Hydraulic Calculation Manual"formula was the closest to the model results,though slightly smaller.The results from the"Code for Hydrological Survey and Design of Railway Engineering"formula,the Lu Hao formula,and the Li Fujun formula were all comparatively small and do not fully reflect the backwater impact.The result from the Henderson formula far exceeded the mathematical model results.This research provides a basis and reference for the calculation and verification methods of backwater for long-roadbed cross-river bridges.
作者
桑林浩
何勇
王海阳
SANG Linhao;HE Yong;WANG Haiyang(China Water Resources Beifang Investigation Design and Research Co.Ltd.,Tianjin 300222,China)
出处
《海河水利》
2025年第11期95-98,共4页
Haihe Water Resources
关键词
桥梁壅水计算
长路基桥梁
数学模型
经验公式
bridge backwater calculation
long-roadbed bridge
mathematical model
empirical formula
