GEORADAR, GEOLOGICAL APPLICATIONS OF SOIL RADAR DATA
Since 1980 the Danish national road laboratory has evaluated soil radar data in connection with geological/geotechnical mapping in planned road corridors. This report describes the method and some of the experiences obtained so far. In marine organic deposits and in very clayey soil hardly any penetration is possible. In Danish boulder clay (clay content around 20%) penetrations in the order of a maximum of 2 m may be expected while a penetration of up to 20 m has been demonstrated in sand and gravel above the ground water table, and up to approximately 8 m in sand and gravel beneath the ground water table. In peat, penetrations of 10 m have been achieved. The resolution properties are in the order of one fifth to half a wave length in the actual medium (in common operations from 0.1 to 0.5 m). In coarse grained material the ground water table may be clearly visible. The best results are obtained at profiling speeds around 5 km/hr, depending on the geological conditions. It is important to stress that the system in itself does not respond to topographical variations in the terrain and velocity variations of the towed system transducer. Thus careful planning, including fixed points in the terrain, prior to an actual investigation is important in order to obtain the best use of the numerous detailed informations from the radar system. (Author/TRRL)
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/01095315
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Corporate Authors:
Statens Vejlaboratorium
Elisagaardsvej 5, Postbox 235
Roskilde, Denmark -
Authors:
- BERG, F
- Publication Date: 1984
Language
- Undetermined
Media Info
- Features: References;
- Pagination: 6 p.
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Serial:
- STATENS VEJLABORATORIUM NOTAT
- Issue Number: 159
- Publisher: DANISH ROAD INSTITUTE
- ISSN: 0109-5315
Subject/Index Terms
- TRT Terms: Geology; Geophysics; Radar
- Uncontrolled Terms: Site investigation
- ITRD Terms: 4053: Geology; 5742: Geophysics; 6738: Radar; 5722: Site investigation
- Subject Areas: Geotechnology; Highways;
Filing Info
- Accession Number: 00492933
- Record Type: Publication
- Source Agency: Transport and Road Research Laboratory (TRRL)
- Files: ITRD, TRIS
- Created Date: May 31 1990 12:00AM