应用大口径管道截流老城区溢流污水方案研究

Study on intercepting overflowing sewage in old city by using large diameter pipelines

在城市地下敷设大口径管道截流城市溢流污水,是解决老城区地下管线密集、雨污分流困难的有效措施。本文以黄冈市遗爱湖片区为目标片区,通过收集区域资料,利用InfoWorks ICM建立模型,模拟分析2m、3m和4m三种大口径管道的截污能力,结果发现,三种口径管道对溢流水量的截流率分别为46%、57%和58%,对COD的截留率分别为67%、77%和81%;此外,结合RTC智能调度,进一步分析小雨、中雨和大雨工况下大口径管道的截污效果,结果表明,小雨情况下可以实现零溢流,中雨和大雨工况下可以有效减少溢流水量。综上所述,大口径管道截污方案是治理城市溢流污染的有效方式。

It is an effective measure to solve the difficulties of dense underground pipelines as well as rain and sewage diversion in old urban areas by laying large diameter underground pipelines to intercept urban overflow sewage.The sewage interception capacity of three large diameter pipelines,with the diameter of 2m,3m and 4m are analyzed based on the collected regional data and the InfoWorks ICM model with Yi’ai Lake in Huanggang as the target area.The result shows that the flow interception rates of pipelines with three diameters are 46%,57%and 58%respectively.The interception rates of COD are 67%,77%and 81%respectively.In addition,the interception effect of large-diameter pipelines under 3 raining situations(light rain,moderate rain and heavy rain)are further analyzed by combining with RTC intelligent scheduling.The result shows that zero overflow can be achieved in light rain situation and the amount of overflow water can be effectively reduced in moderate and heavy rain situations.In summary,it is an effective way to control urban overflow pollution by using large diameter pipelines.