Ground deformation response induced by jacking process of deep rectangular tunnel in soft clay

被引：0
|
作者：
Deng T. [1 ,2 ]
Huang M. [1 ,2 ]
Shi Z. [1 ,2 ]
Zhang Z. [3 ]
Wang H. [3 ]
机构：
[1] Department of Geotechnical Engineering, Tongji University, Shanghai
[2] Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai
[3] Shanghai Urban Construction Design and Research Institute (Group) Co. Ltd., Shanghai
来源：
Tumu Gongcheng Xuebao/China Civil Engineering Journal | 2023年 / 56卷
关键词：
finite element analysis; ground deformation; rectangular pipe jacking; small strain stiffness; soft clay;
D O I：
10.15951/j.tmgexb.2023.S2.wt10
中图分类号：
学科分类号：
摘要：
Based on Jing' an Temple Station Project of Shanghai Rail Transit Line 14, a three-dimensional numerical simulation of the pipe jacking process was carried out using inter-granular strain (IGS) small strain stiffness constitutive model. The numerical model is verified by comparing against field measurements and past engineering experience. By using the constructed numerical model, the ground deformation response caused by rectangular pipe jacking in soft clay stratum is analyzed. The main conclusions include: (1) The numerical simulation based on the IGS small-strain stiffness constitutive model can reasonably reflect the characteristics of surface settlement caused by rectangular pipe jacking; (2) The shape of the surface settlement trough can be represented by the Gaussian distribution, while the width coefficient of the settlement trough becomes smaller as the jacking proceeds; ( 3 ) The deep horizontal displacement of the soil is distributed in an "S" shape. At the depth of the tunnel top, the soil has the highest lateral displacement away from the tunnel and horizontal displacement along the jacking direction. At the depth of the tunnel, the soil has the largest lateral displacement toward the tunnel and horizontal displacement along the opposite direction of jacking. © 2023 Editorial Office of China Civil Engineering Journal. All rights reserved.
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页码：157 / 162
页数：5
相关论文
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