HUANGRong-min,ZHANGYe,LIUKa,et al.Distribution Characteristics of Municipal Rainwater and Sewage Pipelines Defects in W City Pipe Network Inspection[J].China Water & Wastewater,2023,39(2):87-93.
W市管网排查中市政雨污水管道缺陷的分布特征
- Title:
- Distribution Characteristics of Municipal Rainwater and Sewage Pipelines Defects in W City Pipe Network Inspection
- Keywords:
- sewer; structural defect; functional defect
- 摘要:
- 排水管网缺陷是影响排水系统正常发挥运行效能的重要因素之一。以长江中下游W市为例，结合该市开展的排水管网探测及管道状况检测成果，对排水管网缺陷特征进行总结分析。结果表明，错口、脱节等接口缺陷是雨污水管道最常见的结构性缺陷，对功能性缺陷来说，障碍物及沉积发生的概率要高于其他类型缺陷；受管材质量及施工质量影响，HDPE双壁波纹管发生缺陷的概率要高于钢筋混凝土管，其中变形是HDPE双壁波纹管最常见的缺陷；粉性土、砂土等软弱土层的存在使管道发生变形、渗漏和沉积的几率增大；相对于结构性缺陷，功能性缺陷更容易由Ⅰ、Ⅱ级发展成Ⅲ、Ⅳ级缺陷，因此加强施工过程管理、提高运维管理能力对于保障管道正常运行至关重要。
- Abstract:
- Sewer defect is one of the important factors affecting the operation efficiency of drainage system. Taking W city in the middle and lower reaches of the Yangtze River as an example, based on the results of drainage network survey and pipe condition inspection of the city, the defect characteristics of drainage network were summarized and analyzed. Results show that joint defects such as off set and disjointed are the most common structural defects of rainwater and sewage pipelines, and the occurrence probability of obstacles and deposits is higher than other types of functional defects. Affected by the quality of pipe material and construction, the probability of defects occurred in double-wall corrugated HDPE pipe is higher than that of reinforced concrete pipe, and deformation is the most common defect of double-wall corrugated HDPE pipes. Soil soft layer such as silty soil and sand soil increases the probability of deformation, leakage and deposition in the pipe. Compared with structural defects, functional defects are more likely to develop from Ⅰ, Ⅱ to Ⅲ, Ⅳ level defects. Therefore, it is crucial to strengthen construction process management and improve operation and maintenance management ability to ensure the normal operation of the pipe.
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