HU Qun-fang,SUN Yan,XIAO Rui,et al.Mechanical Analysis of Bends and Supports of Water Supply Pipeline in Urban Utility Tunnel[J].China Water & Wastewater,2020,36(20):19-26.
城市综合管廊供水管道弯管及其支墩体系力学分析
- Title:
- Mechanical Analysis of Bends and Supports of Water Supply Pipeline in Urban Utility Tunnel
- 作者:
-
胡群芳1,2，孙
1，肖瑞2，崔万丽2，陈建华3 - (1.同济大学上海防灾救灾研究所，上海200092；2.同济大学土木工程学院，上海200092；3.芜湖新兴铸管有限责任公司，安徽芜湖241000)
- 摘要:
- 近年来随着我国城市市政管网建设、更新与改造，国家大力推动城市综合管廊建设。相比于传统的直埋式市政管线，管廊内主要采取吊架或支墩方式架空敷设各种管线，因此，管廊内大口径有压管道弯管连接区域，因输送介质压力方向改变会对管道产生附加的不平衡推力，从而影响其接头与支墩受力状态与安全。针对综合管廊内敷设DN800大口径球墨铸铁供水管道弯管及支墩受力问题，考虑2组9种不同角度连接工况下管道输送水体—管体结构—支墩约束整体作用体系，利用流-固耦合分析方法，研究了弯管管道、支墩在不平衡推力作用下的结构内力分布与影响，并得到了综合管廊弯管设计中管道与支墩设计内力控制截面。该研究工作可为城市综合管道建设设计提供指导，并为管廊安全运营提供重要的技术支撑。
- Abstract:
- In recent years, the construction of the urban utility tunnel has been vigorously promoted with the construction, renewal and reconstruction of municipal pileline network in China. The water supply pipeline, as the most important part of the urban pipe network, has gradually changed from underground to overhead laying with supports or hangers in utility tunnels. Because water supply pipe is a pressure pipe with different angle connection, its water pressure will produce additional thrust force on the pipes bend. This paper analyzes the mechanical problems of DN800 ductile iron pipe bend, and the bearing capacity of buttresses is also investigated in urban utility tunnel. The thrust force of 2 groups with 9 working conditions of DN800 ductile iron pipe is stimulated by the fluid-solid coupling FEM method. The internal force control section for the pipe and buttress in the designed bend is obtained. The research work can provide a technical reference for the design and safe operation of the urban utility tunnel.
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