城市街道积水回流对地下管网排水影响显著,为了反映地表回流的影响,提出了包含街道和管道的双层排水结构模型,通过虚拟连接通道进行地表和地下排水系统的水量交换,并推导了通道过流量的计算方法,实现了街道积水回流的模拟,建立了完整的城市雨洪排涝计算模型。利用典型案例对模型计算进行验证,结果表明:该模型可模拟街面积水和过流过程,在发生街道漫流的情况下,计算结果合理,较传统模拟方法更贴近实际。 In order to reflect the influence of surface return, a double-layer drainage structure model containing streets and pipelines is proposed, and the water exchange between surface and underground drainage systems through virtual connection channels is deduced The calculation method of passage overflow has realized the simulation of street water backflow and established a complete calculation model of storm flood and drainage. The typical case is used to validate the model calculation. The results show that the model can simulate street water flow and overcurrent process, and the calculation result is reasonable in the case of street flow, which is more realistic than the traditional simulation method.