Wak Test To Find Spread Footing Stiffness

A method is described to obtain the static stiffness of the soil under a spread footing by using a hammer impact test. In the first part, the analytical background is presented. In the second part, a test setup is described and the associated results are discussed. The test consists of placing two g...

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Bibliographic Details
Published in:Journal of geotechnical engineering 1990-03, Vol.116 (3), p.415-431
Main Authors: Briaud, Jean-Louis, Lepert, Philippe
Format: Article
Language:English
Subjects:
Applied sciences
Buildings. Public works
Earthwork. Foundations. Retaining walls
Exact sciences and technology
Geotechnics
TECHNICAL PAPERS
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Description
Summary:A method is described to obtain the static stiffness of the soil under a spread footing by using a hammer impact test. In the first part, the analytical background is presented. In the second part, a test setup is described and the associated results are discussed. The test consists of placing two geophones on the footing, hitting the footing with the instrumented hammer, and recording the force time and velocity time signals. The paper shows that the static stiffness obtained in a load test and the stiffness obtained from the impact test by Fourier transform analysis are reasonably close.
ISSN:0733-9410
1944-8368
DOI:10.1061/(ASCE)0733-9410(1990)116:3(415)