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。
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.
作者
胡群芳
孙
肖瑞
崔万丽
陈建华
HU Qun-fang;SUN Yan;XIAO Rui;CUI Wan-li;CHEN Jian-hua(Shanghai Institute of Disaster Prevention and Relief,Tongji University,Shanghai 200092,China;School of Civil Engineering,Tongji University,Shanghai 200092,China;Wuhu Xinxing Ductile Pipes Co.Ltd.,Wuhu 241000,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2020年第20期19-26,共8页
China Water & Wastewater
基金
国家重点研发计划项目(2016YFC0802400、2017YFC0803300)
国家自然科学基金资助项目(51878510)。
关键词
城市综合管廊
供水管道
流-固耦合分析
urban utility tunnel
water supply pipeline
fluid-solid coupling analysis
