NUMERICAL TUNNEL DESIGN - HOW FAR HAVE WE COME

This article describes recent developments in use of computers to carry out complex 3D analysis of tunneling projects in the context of how much value they bring to a project and whether they have enhanced tunnel design and analysis. Tunneling has grown increasingly complex with additional demands concerning health and safety and approvals. For example, the provision for fire "loading" and "step-free" access are placing demands on designers that weren't in place in the 1960s and 1970s. Approvals needed from third parties also add to complexity and make it more desirable to be able to run numerical equivalents before committing to a final version. Modeling of this sort can also help plan instrumentation and monitoring systems. With new, more powerful software and computers, the industry is moving from an empirical approach to a more analytical one. Areas where this development could create divergence from traditional practices include analysis of ground movement effects, where empirical estimating systems tend to create over-conservative results. Similar weaknesses affect predictions of damage to masonry structures. Modeling soil- structure interaction is greatly enhanced with these new methods. They can effectively and accurately assess the distribution of ground movements around an advancing tunnel and assess a structure's response to complex excavation and construction sequences. Diagrams and a table summarizing changing design requirements in soft-ground tunneling projects since Victorian times are provided.

  • Availability:
  • Corporate Authors:

    Polygon Media Limited

    Tubs Hill House, London Road
    Sevenoaks, Kent TN13 1BY,   United Kingdom 
  • Authors:
    • Grose, B
    • Macklin, S
    • Yeow, H C
  • Publication Date: 2005-5

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 40-43
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01001744
  • Record Type: Publication
  • Source Agency: UC Berkeley Transportation Library
  • Files: BTRIS, TRIS
  • Created Date: Jul 7 2005 12:00AM