Statistical characterization of drainage pipe defect development based on inspection data

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Apr.2026, Vol.49 No.4: 566-570

DOI: 10.3969/j.issn.1003-5060.2026.04.018

Authors

LI Boqian $ ^{1} $, GUO Shuai $ ^{1} $, CHENG Haoke $ ^{2} $

(1. School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China; 2. Yangtze Ecology and Environment Co., Ltd., Wuhan 430014, China)

Abstract and Keywords

Abstract: In order to explore the characteristics of the development of defects in drainage pipes, two rounds of closed circuit television(CCTV) inspection data from a city in southern China were statistically compared and analyzed. The results show that 17 714 pipe defects were identified in the first inspection in 2020, while the number of defects reached 18 572 in the second inspection in 2021, indicating an increase of 858 defects and a 6% increase in the defect density. In addition, the percentage of pipes with Grade 3 and 4 defects increased from 37.3% to 38.9%, indicating that both the number of pipe defects and the defect grade in the area are on the rise. Further analyses reveal that factors such as pipe material, pipe length, age of construction and external environment have impact on the condition of the pipes.

Keywords: drainage pipes; closed circuit television(CCTV) inspection; pipe defects; defect development; defect assessment

作者信息

李伯乾 $ ^{1} $，郭帅 $ ^{1} $，成浩科 $ ^{2} $

(1. 合肥工业大学土木与水利工程学院, 安徽合肥 230009; 2. 长江生态环保集团有限公司, 湖北武汉 430014)

摘要和关键词

摘要: 为探究排水管道缺陷发育特征,文章对南方某市2次管道闭路电视(closed circuit television, CCTV)检测数据进行统计对比分析。结果表明:2020年第1次检测时排水管道共存在17 714处缺陷,而2021年第2次检测时缺陷数量达到18 572处,增加了858处,缺陷密度增长了6%,且3、4级缺陷的管道缺陷数量占比从37.3%增长到38.9%,说明该地区排水管道的缺陷数量和缺陷级数均呈现上升趋势。进一步分析发现,管道材质、管道长度、建设年龄和外界环境等因素都对管道的健康状况产生一定影响。

关键词: 排水管道；管道闭路电视（CCTV）检测；管道缺陷；缺陷发育；缺陷评估

Funding

安徽省重点研究与开发计划资助项目（202104i07020012）；长江生态环保集团有限公司科技创新团队经费资助项目（YEEC-KCTD-202207）

合肥工业大学学报(自然科学版)

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