摘要
装配式外置捷装挂架系统是一种适用于地铁盾构隧道内固定机电设备和管线的新型支架结构,具有工艺简单、绿色环保、对隧道管片无损伤等优点。以福州地铁5号线工程实例为背景,通过现场静力试验和有限元软件模拟等手段,研究装配式外置捷装挂架系统的承载性能。研究表明:(1)地铁盾构隧道装配式外置捷装挂架系统在静载作用下考虑3倍安全系数能满足结构的安全性能;(2)在荷载作用处、长螺栓与槽道、混凝土管片手孔处、槽道与挂耳交接处都出现局部应力集中现象,应力最大点位于长螺栓的顶部,但最大应力均小于材料容许应力;(3)当荷载作用在接触网横梁上,长螺栓变形影响最大,对混凝土管片、挂耳、纵向连接螺栓变形影响很小。
The assembled external quick mounting rack system is a new type of support structure suitable for fixing electromechanical equipment and pipelines in metro shield tunnel. It has the advantages of simple process, green environmental protection and no damage to tunnel segments. Based on the engineering example of Fuzhou Metro Line 5, the load-bearing performance of the assembled external quick mounting pylon system is studiedby means of field static test and finite element software simulation. The study shows that:(1)The safety performance of the metro shield tunnel assembled external quick-mounted hanger system can be satisfied by considering the safety factor of 3 times under static load;(2) Local stress concentration occurs at the load action, the intersection of long bolt and groove, and the intersection of groove and lug at the hand hole of concrete pipe slice. The maximum stress point is located at the top of the long bolt, but the maximum stress is less than the allowable stress of the material;(3) When the load acts on the OCS crossbeam, the deformation of long bolt has the greatest influence, but has little influence on the deformation of concrete segment, lug and longitudinal connecting bolt.
作者
黄少强
蔡燕燕
彭健
刘荣标
俞缙
Huang Shaoqiang;Cai Yanyan;Peng Jian;Liu Rongbiao;Yu Jin(Fujian Research Center for Tunneling and Urban Underground Space Engineering,Huaqiao University,Xiamen,Fujian 361021,P.R.China;Kangyuan Rail Transit Technology(Fujian)Co.,Ltd.,Fuzhou 350000,P.R.China)
出处
《地下空间与工程学报》
CSCD
北大核心
2022年第3期945-954,共10页
Chinese Journal of Underground Space and Engineering
基金
国家自然科学基金资助项目(51874144,42077254)
福建省科技计划引导性项目(2020H0014)。
关键词
装配式外置槽道
接触网
承载性能
现场试验
数值分析
assembled external channel
catenary
bearing capacity
field test
numerical analysis
