Effect of Subway Operation Load on Cross-Section Deformation of Large- Diameter Shield Tunnel

Structural safety of subway tunnels plays an important role in safety control of an urban railway system. In order to reduce construction risks and improve construction efficiency and underground space usage, a large-diameter shield tunnel is used in subway systems. Shield tunnel safety is closely related to cross-section deformation. However, existing studies mainly concentrate on conventional-diameter tunnels and the influence of operation load on cross-section deformation is rarely conducted. By establishing a Vehicle-Track-Tunnel-Soil coupled dynamic model, this paper discusses the impact of operation load on cross-section deformation of a large-diameter shield tunnel. Results show the vertical and horizontal deformation reciprocally correspond to each other, both have obvious correspondence with load spectrum, and there exists accumulation. The splaying amount of segment joints at the haunch of the tunnel is studied. The results may be of some help to safety control work in subway systems.

Language

  • English

Media Info

  • Media Type: Web
  • Features: References;
  • Pagination: pp 1248-1258
  • Monograph Title: CICTP 2014: Safe, Smart, and Sustainable Multimodal Transportation Systems

Subject/Index Terms

Filing Info

  • Accession Number: 01532907
  • Record Type: Publication
  • ISBN: 9780784413623
  • Files: TRIS, ASCE
  • Created Date: Jul 2 2014 3:02PM