Application of Artificial Freezing Method in Deformation Control of Subway Tunnel

The metro tunnel construction mainly passes through the downtown area, including ground buildings, infrastructure, underground pipelines, existing subway lines, and station floors. However, it is very difficult to control the ground deformation, especially in the water-rich soft ground or in the tun...

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Bibliographic Details
Published in:Advances in materials science and engineering 2022, Vol.2022, p.1-21
Main Authors: Li, Jie, Li, Jinke, Cai, Yuancheng, Wu, Dingyi, Guo, Chunxia, Zhao, Wencai, Tang, Kunjie, Liu, Yuhang
Format: Article
Language:English
Subjects:
Deformation
Engineering
Environmental impact
Freezing
Geology
Groundwater
Heat conductivity
Moisture content
Pipes
Reinforcement
Soft ground
Subway construction
Subway tunnels
Topography
Tunnel construction
Underground construction
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Summary:The metro tunnel construction mainly passes through the downtown area, including ground buildings, infrastructure, underground pipelines, existing subway lines, and station floors. However, it is very difficult to control the ground deformation, especially in the water-rich soft ground or in the tunnel engineering construction with strict requirements for surface settlement control. The traditional stratum reinforcement method may not meet the engineering needs. In this case, the artificial freezing method (AFM) provides a solution for such engineering problems. This paper summarizes the basic principle and characteristics and application scope of AFM, and compared with the other three stratum reinforcement methods, AFM has better effect in controlling surface displacement and vault settlement, while grouting method, pipe shed method, and pipe curtain method have absolute advantages in controlling surface uplift. Then, through engineering examples, the reinforcement effect of AFM in the four aspects of subway connecting passage, shield inlet and outlet, interval tunnel, and damage repair is introduced. Through analysis, it is found that the reinforcement effect of AFM in water-rich weak stratum is very good. Finally, the future development of AFM is prospected in order to provide some experience and guidance for the follow-up research.
ISSN:1687-8434
1687-8442
DOI:10.1155/2022/3251318