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设计洪水流量为桥涵跨度及孔径的设计提供了可靠依据。目前,我国公路部门使用的设计洪水流量计算参数年代久远,没有将近30年的洪水变化情况考虑进去。论文介绍了我国于1960年和1979年两次对设计洪水流量计算公式的研究成果,并对流量计算参数进行深入分析。结果表明:有必要对现行的经验公式进行修订,以提高其适应性;建议采用水利部门的水文分区和设计洪水流量计算参数。
Design flood flow provides a reliable basis for the design of bridge span and aperture. At present, the calculation parameters of design flood flow used by the highway departments in our country are rather old and have not been taken into account for flood changes in the past 30 years. The paper introduces the research results on the formula of design floodwater flow in China in 1960 and 1979, and analyzes the parameters of flow calculation in depth. The results show that it is necessary to revise the existing empirical formula to improve its adaptability. It is suggested that hydrological divisions and design flood flow parameters be calculated.