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.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/07339410
• 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
• 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