GROUND PENETRATING RADAR INVESTIGATION

This paper describes strategies for cost-effective ground penetrating radar (GPR) surveys in tunnels, and presents three case histories. Within the last decade, GPR has been used increasingly as a high-resolution inspection tool in civil engineering and non-destructive testing (NDT). The following sequence is proposed for a GPR concrete tunnel inspection survey: (1) obtain design specifications for the original structure; (2) check available information from any previous NDT inspection using GPR on a similar structure; (3) obtain local site and rock information; (4) perform a trial inspection on the site, using radar transducers with different frequencies; (5) conduct a detailed trial survey in the presence of a suitably experienced person; (6) assess the results of the trial survey; and (7) conduct a full survey. The following case studies are described, to indicate the range of conditions and problems that can occur: (1) investigation of rail tunnel walls; (2) investigation of concrete pipe sections; and (3) investigation of voids using an in-pipe GPR survey. GPR surveys can provide important information about material changes and voided areas around the linings of tunnels and concrete pipes; they should adopt a rigorous, responsible attitude to health and safety.

  • Availability:
  • Corporate Authors:

    PALLADIAN PUBLICATIONS LTD

    THE OLD FORGE
    ELSTEAD, SURREY  United Kingdom  GU8 6DD
  • Authors:
    • FENNING, P J
    • BROWN, A J
  • Publication Date: 1995

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 17-21
  • Serial:
    • CONSTRUCTION REPAIR
    • Volume: 9
    • Issue Number: 6
    • Publisher: PALLADIAN PUBLICATIONS LTD
    • ISSN: 0967-0726

Subject/Index Terms

Filing Info

  • Accession Number: 00723189
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Jul 26 1996 12:00AM