Comparative study on statistical distribution characteristics of drainage pipeline defects in three southern and northern cities

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Jul.2023, Vol.46 No.7: 930-935

DOI: 10.3969/j.issn.1003-5060.2023.07.011

Authors

LIU Yanhai $ ^{1} $, LI Hong $ ^{2} $, GUO Shuai $ ^{3} $

(1. Tianjin Port Free Trade Zone Environment Investment Development Group Co., Ltd., Tianjin 300452, China; 2. Tianjin Municipal Engineering Design and Research Institute, Tianjin 300051, China; 3. School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China)

Abstract and Keywords

Abstract: In order to explore whether there are regional differences in urban drainage pipeline defects, this paper selected drainage pipelines in the southern cities of Wuhu and Lu'an and the northern city of Tianjin as research objects, and statistically analyzed the density and type distribution of drainage pipeline defects in different regions. The results show that the pipeline defect densities in Wuhu, Lu'an and Tianjin are 74.0, 55.8 and 6.0 per km, respectively, and the proportion of defects above grade 3 is 31%, 14% and 12%, respectively. Basically, the pipeline defect density and severity are different in three cities, and the pipeline conditions are worse in southern cities. The density of rainwater pipeline defects is 55.9 per km, which is greater than that of 44.1 per km of sewage pipeline, and the density of deformation and leakage defects in sewage pipeline is greater than that of rainwater pipeline, while the misalignment, rupture and corrosion in rainwater pipeline are more serious. In addition to the properties of pipelines, construction years and construction factors, the reasons for the differences in the distribution of pipeline defects are also related to external factors such as soil properties, geological conditions and river and lake systems in various regions.

Keywords: drainage pipeline; closed circuit television(CCTV) detection; pipeline defect; defect assessment

作者信息

刘艳海 $ ^{1} $，李鸿 $ ^{2} $，郭帅 $ ^{3} $

(1. 天津港保税区环境投资发展集团有限公司，天津 300452；2. 天津市政工程设计研究总院有限公司，天津 300051；3. 合肥工业大学土木与水利工程学院，安徽合肥 230009)

摘要和关键词

摘要: 为探究城镇排水管道缺陷是否存在地区差异,文章选取南方的芜湖市、六安市及北方的天津市3个城市排水管道作为研究对象,统计分析不同地区排水管道缺陷密度和缺陷类型分布。结果表明:芜湖市、六安市、天津市的管道缺陷密度分别为74.0、55.8、6.0个/km,三级以上缺陷所占比例分别为31%、14%、12%;不同地区管道缺陷密度与严重程度分布存在一定差异,南方地区管道缺陷密度与严重缺陷占比均大于北方地区;雨水管道缺陷密度为55.9个/km,大于污水管道的44.1个/km,污水管中的变形、渗漏缺陷密度大于雨水管,而雨水管中错口、破裂、腐蚀更为严重。造成管道缺陷分布差异的原因除管道自身属性、建设年限、施工因素外,还与各地区土壤性质、地质条件及河湖水系等外部因素有关。

关键词: 排水管道；管道闭路电视（CCTV）检测；管道缺陷；缺陷评估

Funding

天津市重点研发计划科技支撑重点资助项目（20YFZCSN01080）；安徽省重点研究与开发计划资助项目（202104i07020012）

合肥工业大学学报(自然科学版)

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