A Numerical Investigation into the Effects of New Shield Tunneling on an Existing Underlying Large-diameter Tunnel

In order to investigate the effects of new shield tunneling on an existing underlying large-diameter tunnel, a centrifuge model test and three-dimensional finite element analyses were performed. The numerical results were verified by the centrifuge test data, and then, a parametric study was conducted. Special attention was paid to the influences of longitudinal bending stiffness of the existing tunnel, vertical clearance between the two tunnels, and Young’s modulus of the soil on the vertical displacement and the curvature radius of the existing tunnel. Results show that the vertical displacement decreases and the curvature radius increases along with the increase of the three aforementioned influence parameters. Moreover, for the vertical displacement of the existing tunnel, the influence scope induced by the change of Young’s modulus of the soil is comparatively wider than that induced by the change of the longitudinal bending stiffness of the existing tunnel, and the change of vertical clearance between the two tunnels induces the most narrow influence scope. These conclusions may provide a helpful reference for engineers to mitigate the response of existing tunnels due to adjacent tunneling.

• Record URL:
  https://doi.org/10.2495/CUEE140241
• Availability:
  • Find a library where document is available. Order URL: http://www.witpress.com/elibrary/wit-transactions-on-the-built-environment/157
• Supplemental Notes:
  • Abstract reprinted with permission from WIT Press.
• Corporate Authors:

  WIT Press

  Ashurst Lodge
  Ashurst, Southampton  United Kingdom  SO40 7AA
• Authors:
  • Li, Peng
  • Du, S J
  • Liu, X G
  • Shang, G P
  • Zhang, Ming
  • Qian, R Y
• Conference:
  • 2014 International Conference on Civil, Urban and Environmental Engineering (CUEE 2014)
  • Location: Beijing , China
  • Date: 2014-8-19 to 2014-8-20
• Publication Date: 2015

Language

• English

Media Info

• Media Type: Web
• Pagination: 9p
• Monograph Title: Advanced Civil, Urban and Environmental Engineering
• Serial:
  • WIT Transactions on the Built Environment
  • Issue Number: 157
  • Publisher: Wessex Institute of Technology
  • ISSN: 1743-3509
  • Serial URL: http://library.witpress.com/pages/listBooks.asp?tID=2

Subject/Index Terms

• TRT Terms: Bending; Centrifuges; Finite element method; Numerical analysis; Shielding (Tunneling); Soil structure interaction; Stiffness; Young's modulus
• Subject Areas: Bridges and other structures; Construction; Geotechnology; Highways; I54: Construction of Tunnels;

Filing Info

• Accession Number: 01571359
• Record Type: Publication
• ISBN: 9781784660451
• Files: TRIS
• Created Date: Jul 28 2015 3:56PM