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Numerical Simulations of Construction of Shield Tunnel with Small Clearance to Adjacent Tunnel without and with Isolation Pile Reinforcement

  • Tunnel Engineering
  • Published:
KSCE Journal of Civil Engineering Aims and scope

Abstract

In the process of building subways in many cities, the technology of shield tunneling has become more widely used. In large cities, it is inevitable for the tunnels to pass through the foundations of buildings or between deep piles of bridges. Due to the many restrictions on urban space in China, the clearance between two tunnels has also become smaller. Hence, it is an urgent technical problem to resolve the mutual influence of the close construction of two tunnels using shield technology. In this study, the shield construction project of two tunnels with a small clearance of 2.6 m has been analyzed. The project is between Tongdewei Station and Shangbu Station in the northern extension section of the Guangzhou Metro Line 8. The main parameters used in the analyses are the tunnel lining deformation and the ground settlement. The construction without and with the isolation pile reinforcement have been simulated numerically. The simulation results have been compared with the on-site monitoring data. Based on the comparison, it shows that with the reinforcement, the tunnel lining deformation and the ground settlement can be reduced significantly. The effect of subway shield construction on the construction of the first subway tunnel will significantly reduce. The deformation of the shield excavation net width and the mutual influence can also be greatly reduced. The findings from this study can be used as technical foundation and reference for the construction of similar projects, i.e. shield tunnel construction with a small clearance between tunnels.

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Acknowledgements

Firstly, This study has been supported by National Natural Science Foundation of China Project (Nos: 51508109 and 51608085), and the Natural Science Foundation of Guangdong Province under Grant Number 2016A030310346. Secondly, The authors acknowledge the financial support provided by the Guangdong Provincial Natural Science Foundation of China (Grant No.2019A1515011397), Chinese National Natural Science Foundation (Grant No. 51978668) and Chinese National Natural Science Foundation (Grant No. 51978177). At last, The authors would like to thank China Tunnel Construction Group Co. Ltd., Guang Dong for their assistance and support.

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Authors and Affiliations

  1. College of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510000, China

    Jianbing Lv & Xulong Li

  2. China Tunnel Construction Co., Ltd., Guangdong, Guangzhou, 510000, China

    Zhanrong Li

  3. School of Civil engineering, Central South University, Changsha, 410012, China

    Helin Fu

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  1. Jianbing Lv
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  2. Xulong Li
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  3. Zhanrong Li
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  4. Helin Fu
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Correspondence to Jianbing Lv.

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Lv, J., Li, X., Li, Z. et al. Numerical Simulations of Construction of Shield Tunnel with Small Clearance to Adjacent Tunnel without and with Isolation Pile Reinforcement. KSCE J Civ Eng 24, 295–309 (2020). https://doi.org/10.1007/s12205-020-1167-y

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  • DOI: https://doi.org/10.1007/s12205-020-1167-y

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