WAK TEST TO FIND SPREAD FOOTING STIFFNESS
A dynamic load test is described that is performed by hitting the footing with a sledgehammer instrumented with a force transducer and recording the footing-soil response with two geophones placed on the footing. The force-time signal from the hammer (input) and the velocity-time signal obtained from the geophones (response) are recorded. An analysis of the force and velocity signals using the fast Fourier transform gives a good estimate of the stiffness of the footing-soil assembly. This nondestructive testing method fits within the series of nondestructive methods for foundation control. The method was used to predict the stiffness of a model scale footing resting on a bed of dry sand.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/07339410
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Corporate Authors:
American Society of Civil Engineers
345 East 47th Street
New York, NY United States 10017-2398 -
Authors:
- Briaud, J-L
- Lepert, P
- Publication Date: 1990-3
Media Info
- Features: Appendices; Figures; References;
- Pagination: p. 415-431
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Serial:
- Journal of Geotechnical Engineering
- Volume: 116
- Issue Number: 3
- Publisher: American Society of Civil Engineers
- ISSN: 0733-9410
Subject/Index Terms
- TRT Terms: Forecasting; Load tests; Nondestructive tests; Sand; Spread footings; Stiffness
- Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;
Filing Info
- Accession Number: 00495166
- Record Type: Publication
- Files: TRIS
- Created Date: Jun 30 1990 12:00AM