Field Monitoring of Segments Deformation during Metro-Station Construction Based on Shield Tunneling

Abstract:

To ensure the influence degree on the environment during constructing metro-station based on shield tunneling is very important in the subway construction. After the shield machine passed the metro-station, the field monitoring of these segments is carried on during getting rid of the segments. The connecting seam opening length of segments, the tunnel convergence and the internal force of the segments’ bolt are estimated. The results show that the opening length of segments of circular connecting seam is larger than that of longitudinal connecting seam, and all the changes of the opening length value is within 1.5 mm. Tunnel convergence change generally contains a gradually becoming smaller and a gradual recovery process, and the tunnel convergence is primarily vertical. Bolt internal force change generally involves stress increasing rapidly, and then decreasing slowly. The field monitoring study will potentially provide the knowledge and reference for similar projects

• Periodical: Applied Mechanics and Materials (Volumes 170-173)
• Pages: 1785-1789
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.170-173.1785
• Online since: May 2012
• Authors: Tao Li, Ying Chao Liu, Bo Liu, Wei Hong Yang, Yang Liu
• Keywords: Bolt Internal Force, Connecting Seam Opening Length, Field Monitoring, Getting Rid of the Segments, Tunnel Convergence

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DOI: 10.1016/0886-7798(95)00015-q