数学排水模型在管网养护中的应用

针对城市排水管网养护不当造成的管网排水不畅、节点溢流、管段超负荷运行得不到有效缓解等问题,以南方城市A区为研究对象,运用物联网在线监测技术对管网过载和漫溢风险问题进行分析和识别,利用数学排水模型软件模拟运算了不同设计降雨情景下管网系统运行状况,并基于监测数据和模型模拟结果制定相应的养护措施。研究结果表明,随着降雨强度的增大和降雨时间的加长,超负荷运行管段长度、节点溢流数量及溢流总量等随之增多,最初主要发生于上游的管道过载和节点溢流情况逐渐向中下游扩展;总溢流量偏大的节点和过载排水时间偏长的管段均属于重点养护对象,应在雨峰出现前后加强对各节点和管段的巡查。

Applications of Mathematical Drainage Model in Pipe Network Maintenance

Aiming at the problems of drainage blockage, node overflow, overload of local pipe section caused by the improper maintenances of urban drainage pipe network, the overtopping risk of a typical region of a city in the South was analyzed and identified based on online monitoring technology of internet of things. With the mathematical drainage model, the operation status of the pipe network system was simulated under different rainfall scenarios. Based on the monitored data and simulated results, the pipe network maintenance measures were formulated. The results show that the length of overloaded pipe sections, the number of overflowed nodes and the total overflow increase with the rainfall intensity and duration, while the overload section and overflow nodes initially occurred in the upstream extended to the middle and downstream. More attentions should be paid to the nodes with relatively larger total overflow and the pipe sections with longer overloaded drainage, and these nodes and pipe sections should be inspected strictly before and after the rain peak.