CHENGHao-ke,WENCheng,ZHANGYe,et al.Diagnosis of Abnormal State in Drainage Pipe Networks Based on Online Liquid Level Monitoring[J].China Water & Wastewater,2025,41(7):124-129.
基于在线液位监测的排水管网异常状态诊断
- Title:
- Diagnosis of Abnormal State in Drainage Pipe Networks Based on Online Liquid Level Monitoring
- Keywords:
- drainage pipe network; abnormal state diagnosis; online liquid level monitoring; liquid level elevation difference
- 摘要:
- 为了充分挖掘在线液位监测数据在排水管网运维中的作用，识别液位变化规律和诊断管网异常运行状态，通过对液位长期监测数据的分析及现场复核验证，在明确管网上下游液位相关关系的基础上，进一步分析了管道液位上涨/下降过程及不同淤积状态对上下游液面高程差变化规律的影响。结果表明，上下游液面高程差与下游管道液位存在联动关系，而由降雨过程中雨水混接所带来的液位变化会导致上下游液面高程差与下游液位的关系异于常规情况；在上游存在多条支管的情况下，支管与主管之间的上下游液面高程差波动程度比无支管情况下要大，支管的淤积会对自身以及其他支管与下游主管的液位变化带来不同的影响。通过合理布置监测点和掌握管道液位的变化规律可更加精确地判断实际管道发生的异常情况类型及位置。
- Abstract:
- Long-term liquid level monitoring analysis and on-site verification were carried out to fully explore the role of online liquid level monitoring data in drainage pipe network operation and maintenance, identify the variation pattern of liquid level and diagnose abnormal operation state. On the basis of clarifying the correlation between the upstream and downstream liquid levels in the pipe network, the influences of the liquid level rise or fall process and the different silting states of pipeline on the variation of the upstream and downstream liquid level difference were analyzed. There existed an interdependent relationship between the upstream and downstream liquid level difference in the pipeline and the downstream liquid level elevation. The fluctuation in liquid level caused by rainwater and sewage mixing during rainfall influenced the relationship between the upstream and downstream liquid level difference and the downstream liquid level elevation. In the case of multiple upstream branches, the fluctuation of the upstream and downstream liquid level difference between the branch and the main pipe was greater than that without branches. Additionally, the siltation within the branch pipe had varying impacts on the liquid level change of each branch and downstream main pipes. By reasonable arrangement of monitoring points and variation pattern of the pipe liquid levels, it was possible to determine the types and locations of abnormal situations within the actual pipelines more accurately.
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