中国铁道科学2024，Vol.45Issue(2)：113-122,10.DOI:10.3969/j.issn.1001-4632.2024.02.11
矩形顶管隧道F型承插接头剪切刚度分析
Shear Stiffness Analysis of F-Socket Joint in Rectangular Pipe Jacking Tunnel
摘要
Abstract
The rectangular pipe jack F-type socket joint is a flexible joint.The overloading of the surface and the uneven settlement of the foundation can easily cause the shear misalignment of the pipe joints,leading to tunnel engineering disasters.Based on the fact that the shear mechanical characteristics of the joint are still unclear in current research,the failure process,stiffness characteristics and influencing factors of the joint under shear load were studied by considering the structural characteristics of the F-type joint in the rectangular pipe jacking tunnel,combined with laboratory joint tests and ABAQUS three-dimensional precision numerical simulations.The results show that when the rectangular pipe jacking joint shear failure occurs,the loaded pipe joint presents a centrosymmetric failure.The shear force-shear displacement curves of joints in different strata are divided into three stages:the contact building stage,the steel ring warping stage and the weld cracking stage.The greater the foundation stiffness,the greater the relative shear stiffness.The stiffness coefficient increases with the increase of the thickness or the width of the steel bushing.With the increases of the width and thickness of the steel bushing,the shear resistance of the joint increases,while the increase range remains limited.The stiffness coefficient of the steel bushing at the yield stage is about 60％-70％of the elastic stage.关键词
隧道工程/矩形顶管/剪切破坏特征/剪切刚度/数值模拟Key words
Tunnel engineering/Rectangular pipe jacking/Shear fracture characteristics/Shear stiffness/Numerical simulation分类
交通工程引用本文复制引用
许有俊,康佳旺,张朝,庞跃魁,黄正东,张旭..矩形顶管隧道F型承插接头剪切刚度分析[J].中国铁道科学,2024,45(2):113-122,10.基金项目
国家自然科学基金资助项目(51868062) （51868062）
