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.
Distribution Characteristics of Municipal Rainwater and Sewage Pipelines Defects in W City Pipe Network Inspection
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第2期
Page:
87-93
Column:
Date of publication:
2023-01-17
- Keywords:
- sewer; structural defect; functional defect
- 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.
Last Update:
2023-01-17