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.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/09670726
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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
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Serial:
- CONSTRUCTION REPAIR
- Volume: 9
- Issue Number: 6
- Publisher: PALLADIAN PUBLICATIONS LTD
- ISSN: 0967-0726
Subject/Index Terms
- TRT Terms: Concrete; Design; Equipment; Frequency (Electromagnetism); Health; Nondestructive tests; Radar; Rocks; Safety; Surveillance; Surveying; Test procedures; Tunnels
- ITRD Terms: 4755: Concrete; 9011: Design (overall design); 3674: Equipment; 6997: Frequency; 2144: Health; 6216: Non destructive testing; 6738: Radar; 4154: Rock; 1665: Safety; 9101: Surveillance; 4025: Surveying (land); 6288: Test method; 3374: Tunnel
- Subject Areas: Bridges and other structures; Design; Geotechnology; Safety and Human Factors;
Filing Info
- Accession Number: 00723189
- Record Type: Publication
- Source Agency: Transport Research Laboratory
- Files: ITRD
- Created Date: Jul 26 1996 12:00AM