The following are identified as areas of concern in tunnel instrumentation: it must be possible to advance the tunnel safely and to maintain the integrity of the opening; construction of the tunnel must not excessively damage adjacent or overlying buildings, streets, or utilities; the tunnel should be capable of withstanding all the influences to which it may be subjected during its lifetime. The measurement systems that can be used in tunnel instrumentation include borehole extensometers and settlement probes, inclinometers, strain gauges, and portable tape extensometers. Future research in instrumentation should be concerned with limiting displacements that can damage nearby structures; instrumentation will be required for larger, shallow openings in rock, soil, and mixed face conditions; improvements are needed in instrument reliability, ease of installation and ability to read instruments; integration of measurement program with field observations and construction and design requirement are seen as beneficial; lastly, there is a need for more literature on the subject for guidance of design engineers, geologists and contractors.

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    • 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:
    • Cording, E J
  • Publication Date: 1977

Media Info

  • Media Type: Print
  • Pagination: pp 27-28
  • Serial:

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Filing Info

  • Accession Number: 00156044
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Oct 13 1977 12:00AM