竖向荷载作用下承插式球墨铸铁供水管道接口破损试验与数值模拟研究  

Experiment and Numerical Simulation Study on Socket and Spigot Joint Damage of Ductile Iron Water Supply Pipeline under Vertical Loading

作　　者：王丽萍[1] 张宛静 赵帅 宁超列[2] WANG Liping;ZHANG Wanjing;ZHAO Shuai;NING Chaolie(School of Civil Engineering,Chongqing University of Science and Technology,Chongqing 401331,China;Tongji University,College of Civil Engineering,Shanghai 200092,China)

机构地区：[1]重庆科技学院建筑工程学院,重庆401331 [2]同济大学土木工程学院,上海200092

出　　处：《防灾减灾工程学报》2023年第2期232-239,共8页Journal of Disaster Prevention and Mitigation Engineering

基　　金：重庆市技术创新与应用示范项目(cstc2018jscx-mszdX0126)资助。

摘　　要：管道接口是影响市政供水管网日常运行安全的关键薄弱环节。然而,目前的研究大多集中于地震荷载和轴向荷载作用下管道接口的力学性能,对于竖向荷载作用下承插式球墨铸铁供水管道接口的弯曲力学性能研究较少,造成这一类型的管道接口无法进行全面的综合评价。鉴于此,以承插式球墨铸铁供水管道接口为主要研究对象,开展了竖向荷载作用下的破损试验和数值模拟。研究结果表明:(1)接口橡胶密封圈接触失效是管道出现渗漏的主要原因;(2)管道接口的相对转角与竖向荷载整体呈正相关关系;(3)管道发生漏水时的相对转角为12°左右。因此,为避免管道接口在接触滑移、旋转、拉拔等不同受力情景下的失效,建议对供水管道的接口构造,尤其是橡胶密封圈进行精细化设计,以提高管道接口的最大允许转角,同时发挥橡胶密封圈良好的压缩和变形能力。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 rotation 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.

关 键 词：球墨铸铁 供水管道 试验研究 竖向荷载 破损机理 

分 类 号：TU443[建筑科学—岩土工程]