珠三角某城市污水管网健康状况评估与修复方案  

Health Assessment and Restoration Plan for Sewage Network in a City in the Pearl River Delta

作　　者：穆浩男 熊佳丽 胡继宗 秦祎 Mu Haonan;Xiong Jiali;Hu Jizong;Qin Yi(Beijing Urban Construction Design&Development Group Co.,Ltd.,Beijing 100035,China;Beijing Drainage Group Co.,Ltd.,Beijing 100044,China)

机构地区：[1]北京城建设计发展集团股份有限公司,北京100035 [2]北京城市排水集团有限责任公司,北京100044

出　　处：《市政技术》2024年第9期169-175,共7页Journal of Municipal Technology

摘　　要：为加快开展城镇污水提质增效工作,理顺污水管网拓扑结构,同时为水环境综合治理控源截污工程留出管道转输容量,珠三角某沿海城市对城市范围内177 km污水管网实施了检测与修复工作。通过对管道检测成果进行定性化评估判读及定量化的统计分析,掌握了管道运行的健康状况。经过CCTV检测,共发现管道缺陷10270处。其中,结构性缺陷9927处,主要表现为破裂、起伏、脱节;功能性缺陷343处,主要表现为障碍物、结垢和树根。根据管段缺陷密度、修复指数等参数指标,分析了不同管材、不同管径下污水管道的健康状况,发现HDPE管道相较于混凝土管道缺陷数量多,且病害程度严重。大管径管道的健康状况优于小管径管道。依据管网健康状况评估分析结果提出对应的管道修复方案,并对污水管道设计、施工、养护全过程提出合理化建议。工程实践证明,管道缺陷修复完成后,管道内污水COD质量浓度提高、管道水位明显下降,实现了污水提质增效目标,可为淤泥地质城市的污水管道施工、检测、修复及养护提供参考。In order to speed up the work of improving the quality and efficiency of urban sewage,sort the topological structure of sewage pipe network,and reserve pipeline transfer capacity for the comprehensive treatment of water environment,source control and sewage interception project,the detection and repair work has been carried out for 177 km of sewage pipe network within a coastal city in the Pearl River Delta.Through qualitative evaluation and quantitative statistical analysis of pipeline inspection results,the health status of pipeline operation has been mastered.After CCTV inspection,a total of 10270 pipeline defects were found,including 9927 structural defects,mainly manifested as fractures,undulations,and dislocations;And 343 functional defects,mainly manifested as obstacles,scaling,and tree roots.Based on parameter indicators of defect density and pipe repair index,the health status of sewage pipes with different pipes and diameters were analyzed.It was found that HDPE pipes have more defects than concrete pipes,and the damage is severe.The health condition of pipelines with larger diameters is better than that with smaller diameters.Based on the analysis results,a corresponding pipeline repair plan is proposed,as well as suggestions for the design,construction,and maintenance of sewage pipelines.When the repair was completed,the COD mass concentration increased and the pipeline water level significantly decreased,achieving the goal of improving sewage quality and efficiency.This provides a reference for the construction,test,repair,and maintenance of urban sewage pipelines in muddy geological areas.

关 键 词：污水管网 CCTV检测 管道缺陷 病害分析 管道修复 

分 类 号：TU992.4[建筑科学—市政工程]