SONG Rui-ning,DAI Zheng-hui,WANG Yu,et al.Influence of Pipe Network Defects on Simulation Results of Urban Drainage System[J].China Water & Wastewater,2021,37(11):125-130.
管网缺陷对城市排水系统模拟结果的影响
- Title:
- Influence of Pipe Network Defects on Simulation Results of Urban Drainage System
- 关键词:
- 排水管网; CCTV检测; 结构性缺陷; 功能性缺陷; InfoWorks ICM模型
- Keywords:
- pipe network; closed-circuit television detection; structural defect; functional defect; InfoWorks ICM model
- 摘要:
- 排水管网作为排水系统的核心部分，长期以来由于受重视程度不够，存在着诸多缺陷和问题。闭路电视（CCTV）检测技术可以快速、直观定位管道内部缺陷，提供准确的基础影像，快速反映排水管网运行状态，为管道修复、养护、改造提供依据。基于管网缺陷对应的模型表达方法，采用城市综合流域模型（InfoWorks ICM）模拟分析管网缺陷对城市排水系统的影响。结果表明，排水管网受沉积和腐蚀等缺陷影响，排水能力不满足1年一遇的管道增加了7.4%，满足3年一遇的管道减少了2.8%。在3年一遇2 h的设计降雨条件下，积水范围比管网无缺陷时增大了13.8%。因此，在模型构建过程中应充分考虑管网缺陷对城市排水系统运行带来的影响，从而为确定管网修复优先等级以及改造等提供依据。
- Abstract:
- As a core part of the drainage system, drainage pipe network has many defects and problems due to the lack of insufficient attention for a long time. Closed-circuit television (CCTV) detection technology can quickly and intuitively locate the internal defects of pipelines, provide accurate basic images, quickly reflect the running state of drainage pipe network, and provide a basis for pipeline repair, maintenance and transformation. Based on model expression method corresponding to the pipe network defects, influence of pipe network defects on urban drainage system was simulated and analyzed by using urban integrated catchment management model (InfoWorks ICM). Affected by the defects such as deposition and corrosion, the pipelines with drainage capacity not meeting 1-year return period increased by 7.4%, while those with drainage capacity meeting 3-year return period decreased by 2.8%. Under the condition of 2-hour design rainfall with 3-year return period, the waterlogging area increased by 13.8% compared with that without defects in the pipe network. Therefore, the impact of pipe network defects on urban drainage system should be fully considered in model construction, so as to provide a basis for determining the priority level of pipe network repair and reconstruction.
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