Shell-Joint Theoretical Model and Longitudinal Deformation of Rectangular Pipe Jacking in Subway Station

被引：0

作者：

Xu, Youjun ^{[1
,2
,3
]}

Huang, Zhengdong ^{[1
,2
,3
,4
]}

Zhang, Chao ^{[1
,2
,3
]}

Li, Pengfei ^{[4
]}

Kang, Jiawang ^{[1
,2
,3
]}

Zhang, Xu ^{[1
,2
,3
]}

Shan, Yuhan ^{[4
]}

机构：

[1] School of Civil Engineering, Inner Mongolia University of Science and Technology, Inner Mongolia, Baotou

[2] Academician Workstation of Mine Safety and Underground Engineering, Inner Mongolia University of Science and Technology, Inner Mongolia, Baotou

[3] Engineering Research Center of Urban Underground Engineering, Universities of Inner Mongolia Autonomous Region, Inner Mongolia, Baotou

[4] The Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing

来源：

Zhongguo Tiedao Kexue/China Railway Science | 2024年 / 45卷 / 04期

关键词：

Foundation stiffness; Rectangular pipe jacking; Shell-joint theoretical model; Subway station; Tunnel longitudinal deformation;

D O I：

10.3969/j.issn.1001-4632.2024.04.11

中图分类号：

学科分类号：

摘要：

In response to the problem that rectangular pipe jacking tunnels are prone to produce longitudinal deformation, which can result in joint failure, a shell-joint theoretical model for rectangular pipe jacking tunnels is proposed, and the longitudinal deformation of tunnels under uneven settlement is examined. Firstly, indoor model tests are carried out to explore the mechanical properties of the joints in rectangular pipe jacking tunnels. Subsequently, the shell-joint theoretical model is established, and the stiffness matrix and computational methods for the mechanical elements of the joints are offered. Then, a numerical model is developed and compared with the results of the indoor model tests. Finally, relying on a case study of a rectangular pipe jacking tunnel with 20 segments, the tunnel’s longitudinal deformation under uneven settlement is investigated. The results show that joint failure appears in three stages: closure of the gap, force and deformation failure of the steel sleeve ring, with the shear and bending resistance of the joints mainly borne by the steel sleeve ring. The simulation results of the shell-joint theoretical model are in line with the model test results, verifying the practicality and accuracy of the model. The longitudinal deformation of the rectangular pipe jacking tunnel is greatly affected by the stiffness of the foundation. The maximum additional settlements corresponding to the three soil types (gravel, silt, and clay) are 3. 72 mm, 7. 66 mm, and 12. 14 mm respectively. As the foundation stiffness decreases, the influence of uneven settlement on the tunnel joints will increase. © 2024 Chinese Academy of Railway Sciences. All rights reserved.

引用

页码：99 / 110

页数：11

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