Differential Settlement and Soil Dynamic Stress of a Culvert-embankment Transition Zone Due to an Adjacent Shield Tunnel Construction

作者：Shan, Yao; Zhou, Shunhua^*; Shu, Yao

来源：KSCE Journal of Civil Engineering, 2018, 22(7): 2325-2333.

DOI：10.1007/s12205-017-1592-8

• railway transition zones
• differential settlement
• soil dynamic stress
• shield tunneling
• track maintenance

The effects of shield tunnel construction on the differential settlement and the distribution of soil dynamic stress of an adjacent culvert-embankment transition zone are investigated. A construction project of shield tunnels in Hangzhou (China) beneath an existing railroad culvert-embankment transition zone is employed as a case study. Firstly, the shield tunneling activities in the vicinity of a culvert-embankment transition zone are simulated by a three-dimensional (3D) Finite Element Analysis (FEA) method. The differential settlement of the transition zone is calculated to evaluate the influence of the shield tunneling on the safety of the passing train. Secondly, a plane strain model is employed to investigate the discipline of the soil dynamic stress in transition zones, which is induced by the passing train and the shield tunnel beneath the railroad. Results indicate that the reinforcement treatment of the foundation is required since the embankment differential settlement is significantly affected by the shield tunneling. Finally, a recommended treatment is introduced according to the property of the surrounding soil. Numerical simulation reveals that this treatment is appropriate for reducing the differential settlement and soil dynamic stress of the transition zone.

• 出版日期2018-7
• 单位同济大学