中等流域桥涵过水流量计算方法比较分析

Comparative Analysis of Calculation Methods for Waterflow Crossing Bridges within Medium River Basin

为了分析比较广东省地区经验公式与规范中推理公式的计算结果,以选取更加适合广东中等流域桥涵过水流量的计算方法,分别采用广东省地区经验公式与规范中推理公式对广东省某高速公路段沿线桥梁进行了过水流量的计算与对比分析。结果发现：推理公式计算结果普遍较广东省地区经验公式计算结果偏大,偏差范围为3.19%~49.10%。考虑桥涵设计的经济性,建议在广东省中等流域的桥涵过水流量计算中采用广东省地区经验公式。

In order to select more suitable calculation method for waterflow crossing bridges within medium river basin in Guangdong Province,in this paper,the calculated results by empirical formula of Guangdong Province and specifications derived formula have been analyzed and compared. The results have shown that： the calculated results of derived formula are larger than those of empirical formula of Guangdong Province,and the deviation has been ranged from 3. 19% to 49. 10%. Considering economy in the bridge design,the empirical formula of Guangdong Province has been advised to be adopted for calculation of waterflow crossing bridges within medium river basin in Guangdong Province.