The Influence of Underpass on Surface Subsidence Caused by Double-Tube Shield Tunneling

Abstract:

Shield construction will cause surface subsidence, and the presence of underground structures above the tunnel has an impact on surface subsidence. Based on this, with the engineering of undercross shield tunnel construction on railway station as background, used numerical simulation method to analyze the effect of surface subsidence of underground passage, and studied the influence of depth and width of underpasses on ground movement induced. The results show that: The impact of the underground passage to the wire surface subsidence caused by the shield cannot be ignored. Surface subsidence caused by double shield will be decreased because of the existence of the underground passage, and that related to the channel depth and width. The greater the depth of underground channel, the greater the surface subsidence; greater the underground channel width, the smaller surface subsidence. Meanwhile, the surface subsidence trough width and the largest settlement scope unrelated to the depth of underground tunnels but the underground channel width, and increases with the increasing of the underpass width.

• Periodical: Advanced Materials Research (Volumes 915-916)
• Pages: 108-113
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.915-916.108
• Online since: April 2014
• Authors: Wei Kai Zong*
• Keywords: Double-Tube Shield, Numerical Analysis, Surface Subsidence, Underground Passage

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