Structural support in a tunnel maintains a stable, usable and economical underground opening and prevents settlement in the surrounding media or adjacent structures. The design of structural supports incorporates the following considerations: media through which the tunnel is to be driven, methods of excavation, function of support, time of support installation, and method of load imposition. Only when the total system of construction is considered can the proper structural support be provided. Some structural supports currently in use are briefly described. Further research is needed to provide more accurate and complete data for support design as well as to verify existing methods of design. Also, demonstration of new design methods and types of supports should be tried in a full-sized tunnel. These demonstrations would further permit both primary and secondary supports to be designed more economically.

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  • Supplemental Notes:
    • This article appeared in TRB Special Report No. 171, Tunnel Construction: State of the Art and Research Needs. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
  • Corporate Authors:

    Transportation Research Board

    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Authors:
    • Taradash, Samuel
  • Publication Date: 1977

Media Info

  • Media Type: Print
  • Features: Photos;
  • Pagination: p 7
  • Serial:

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Filing Info

  • Accession Number: 00156031
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Oct 13 1977 12:00AM