摘要
为保证隧道衬砌模板台车的施工安全,以某高速公路分岔式长隧道为例,根据给出衬砌台车的尺寸,对隧道二次衬砌台车模板系统进行了设计,计算了其纵肋和环向肋内力和变形,并基于ANSYS分析软件,计算了台车门型结构内力和变形。结果表明,模板系统、台车结构的强度与刚度均满足设计要求。根据计算结果,建议浇筑二次衬砌混凝土时应注意对称浇筑,保持台车受力对称,且在门架的底纵梁处纵向每隔1 m加设1道I20a工字钢水平支撑,在两主肋之间增加环向次肋角钢。
In view of the safety of the tunnel lining formwork trolley,with a case study of bifurcated long highway tunnel,a secondary lining trolley formwork system of the tunnel has been designed according to the size of the lining trolley,with a calculation made of the internal force and deformation of the longitudinal and circumferential ribs,followed by a further calculation of the internal force and deformation of the trolley door structure based on ANSYS software.The results show that the strength and rigidity of the formwork system and the trolley structure meet the design requirements;according to the calculation results,it is recommended that the secondary lining concrete should be poured symmetrically to keep the trolley stress symmetrical,with a horizontal support of I20a I-steel be added at the longitudinal interval of 1 m at the bottom longitudinal beam of the portal frame,and the circumferential secondary rib angle steel should be added between the two main ribs as well.
作者
刘思远
张华雨
祝方才
罗睿
周正茂
LIU Siyuan;ZHANG Huayu;ZHU Fangcai;LUO Rui;ZHOU Zhengmao(College of Civil Engineering,Hunan University of Technology,Zhuzhou Hunan 412007,China;2nd Engineering Co.Ltd.,China Railway Beijing Group Engineering Co.Ltd.,Changsha 410116,China)
出处
《湖南工业大学学报》
2021年第2期7-14,共8页
Journal of Hunan University of Technology
基金
湖南省自然科学株洲联合基金资助项目(2018JJ4007)。
关键词
二次衬砌台车
隧道台车
内力分析
变形
secondary lining trolley
tunnel lining trolley
internal force
deformation
