The pipeline joint is a key and weak segment affecting the daily operation safety of the mu-nicipal water supply network. However, most of the current investigations were devoted to the me-chanical performance of pipeline joints under seismic and axial loading, while there were few studies on the flexural mechanical behaviors of ductile iron water supply pipeline joints under vertical loading, resulting in a lack of comprehensive evaluation on this type of pipeline joints. In this study, the ductile iron water supply pipeline joint is taken as the main research object to study its damage behavior under vertical loading by experiment and numerical simulation. The results indicate that:(1) the contact fail-ure of the rubber sealing ring in joint is the main cause of the pipeline leakage;(2) the relative rotation angle of the pipeline joint and the vertical load have a good positive correlation;(3) The relative rota-tion angle when the pipeline exhibits water leakage is around 12°. Therefore, there is a need to per-form a refined design for water supply pipeline joint and rubber sealing ring in order to avoid the failure of pipeline joint under different loading circumstances such as contact sliding, rotation and drawing, so as to increase the maximum allowable relative angle of the pipeline joint, and to develop the excellent compression and deformation ability of the rubber sealing ring.
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Ning C L,Hu Q F,Wang F.Mechanical-based ap?proach for operational risk evaluation of water mains inshanghai[J].Journal of Pipeline Systems Engineeringand Practice,2020,11(1):06019003.
国家统计局.《中国统计年鉴-2021》[M].北京:中国统计出版社,2021.National Bureau of Statistics.China Statistical Year?book-2021[M].Beijing:China Statistics Press,2021.(in Chinese)
北京地下管线综合管理研究中心与中国城市规划协会地下管线专业委员会.2021 年全国地下管线事故统计分析报告[R].北京:北京地下管线综合管理研究中心,2022.Beijing underground pipeline comprehensive manage?ment research center and underground pipeline profes?sional committee of china urban planning association,statistical analysis report on national underground pipe?line accidents in 2021[R].Beijing,2022.(in Chinese)
曹徐齐,阮辰旼.全球主要城市供水管网漏损率调研结果汇编[J].净水技术,2017,36(4):6-14.Cao X Q,Ruan C M.Compilation of investigation onwater loss rate of water supply pipelines in global majorcities[J].Water Purification Technology,2017,36(4):6-14.(in Chinese)
赵乱成.给水管道损坏的主要原因和对策[J].给水排水,1997,23(12):55-58.Zhao L C.Main causes and countermeasures of watersupply pipeline damage[J].Water & Waste Engineer?ing,1997,23(12):55-58.(in Chinese)
周静海,刘飞,杨永生,等.地下UPVC供水管线柔性接口抗震试验[J].沈阳建筑大学学报(自然科学版),2008,24(6):970-973.Zhou J H,Liu F,Yang Y S,et al.The analysis and ex?perimental research of the underground UPVC waterpipeline′s flexibility joint[J].Journal of Shenyang Jian?zhu University(Natural Science),2008,24(6):970-973.(in Chinese)
吴少艳,吴德军,陈东.地震对市政管道的破坏及管道的抗震处理[J].地震工程与工程振动,2006,26(3):200-202.Wu S Y,Wu D J,Chen D.Earthquake damage to mu?nicipal pipes and seismic treatment[J].Earthquake En?gineering and Engineering Dynamics,2006,26(3):200-202.(in Chinese)
Rajani B,Abdel-Akher A.Performance of cast-ironpipe bell-spigot joints subjected to overburden pressureand ground movement[J].Journal of Pipeline SystemsEngineering and Practice,2013,4(2),98–114.
李晓晓,钟紫蓝,侯本伟,等.大型球墨铸铁管承插式接口力学性能研究[J].特种结构,2020,37(4):47-55.Li X X,Zhong Z L,Hou B W,et al.Study on mechan?ical properties of socket interface of large ductile ironpipe[J].Special Structure,2020,37(4):47-55.(inChinese)
Wham B P,O′Rourke T D.Jointed pipeline responseto large ground deformation[J].Journal of Pipeline Sys?tems Engineering and Practice,2016,7(1):04015009.
蔡志雄.承插式球墨铸铁管道柔性接口力学性能影响的试验研究[J].水利科学与寒区工程,2022,5(2):22-24.Cai Z X.Experimental study on mechanical propertiesof flexible joint of socket ductile iron pipe[J].HydroScience and Cold Zone Engineering,2022,5(2):22-24.(in Chinese)
周静海,李宏男,宋阳.埋地球墨铸铁供水管道轴向拉拔试验[J].沈阳建筑大学学报(自然科学版),2009,25(3):474-477.Zhou J H,Li H N,Song Y.Pullout test research onthe underground water pipelines [J].Journal ofShenyang Jianzhu University(Natural Science),2009,25(3):474-477.(in Chinese)
钟紫蓝,王书锐,杜修力,等.管道承插式接口轴向力学性能试验研究与数值模拟[J].工程力学,2019,36(3):224-239.Zhong Z L,Wang S R,Du X L,et al.Experimentaland numerical study on axial mechanical properties ofpipeline under pseudo-static loading[J].EngineeringMechanics,2019,36(3):224-239.(in Chinese)
钟紫蓝,王书锐,甄立斌,等.经垫衬法修复后铸铁管道接口力学性能试验[J].哈尔滨工业大学学报,2019,51(6):141-147.Zhong Z L,Wang S R,Zhen L B,et al.Experimentalstudy on mechanical properties of ductile iron pipelinerehabilitated by corrosion protection lining[J].Journalof Harbin Institute of Technology,2019,51(6):141-147.(in Chinese)
韩阳,李冠潮,李东桥,等.管道承插式柔性接口轴向力学性能试验研究[J].地震工程与工程振动,2020,40(5):44-51.Han Y,Li G C,Li D Q,et al.Experimental study on axial mechanical properties of pipeline under pseudostatic loading[J].Earthquake Engineering and Engineer?ing Dynamics,2020,40(5):44-51.(in Chinese)
任雪振,韩阳,杨金城.偏心拉伸作用下球墨铸铁管道柔性接头力学性能试验研究[J].河南城建学院学报,2019,28(5):37-40.Ren X Z,Han Y,Yang J C.Experimental study on me?chanical properties of ductile iron pipe flexible joint un?der eccentric tension[J].Journal of Henan University ofUrban Construction,2019,28(5):37-40.(in Chinese)
段君峰,韩阳,薛晨曦,等.球墨铸铁管道胶圈柔性接口弯曲试验研究[J].给水排水,2016,42(3):103-106.Duan J F,Han Y,Xue C X,et al.Experimental studyon flexible joint bending of ductile iron pipe rubber ring[J].Water & Waste Engineering,2016,42(3):103-106.(in Chinese)
顾晓鲁,钱鸿缙,刘惠珊,等.地基与基础(第三版[M].北京:中国建筑工业出版社,2003.Gu X L,Qian H J,Liu H S,et al.Soil and foundation(Third version)[M].Beijing:China Architecture &Building Press,2003.(in Chinese)
王丽萍,刘自尊,赵帅,等.市政聚乙烯供水管材温度拉伸试验研究[J].给水排水,2021,47(增):125-132.Wang L P,Liu Z Z,Zhao S,et al.Tensile test of mu?nicipal polythene water mains under temperature condi?tions[J].Water & Wastewater Engineering,2021,47(Sup):125-132.(in Chinese)
王复明,何航,方宏远,等.交通和运行荷载耦合作用下管道承插口力学响应研究[J].郑州大学学报(工学版),2020,41(4):1-6.Wang F M,He H,Fang H Y,et al.Study on mechani?cal response of the bell-and-spigot joints of pipeline un?der the coupling of traffic and running load[J].Journalof Zhengzhou University(Engineering Science),2020,41(4):1-6.(in Chinese)