Nondestructive Evaluation of Existing Deep Foundations
Publication: Journal of Performance of Constructed Facilities
Volume 9, Issue 1
Abstract
Nondestructive testing (NDT) for the evaluation of deep foundations has been practiced for more than a quarter of a century, usually on new construction projects. It is not always realized that the performance evaluation of older, deep foundations under existing structures can be enhanced by nondestructive testing. The NDT techniques currently available for this objective are described and critically reviewed in this paper. Case histories illustrating the use of different methods to inspect existing piles, drilled shafts, and caissons are presented. Most of these NDT methods are applied in Europe and East Asia, and the present limited use of small-strain nondestructive testing in the North American deep foundation industry is discussed. It is concluded that the methods described in this paper could be usefully employed more often; their limited use is mainly a result of unfamiliarity with the tests and a lack of awareness of their potential by the general engineering community.
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Published In
Journal of Performance of Constructed Facilities
Volume 9 • Issue 1 • February 1995
Pages: 57 - 74
Copyright
Copyright © 1995 American Society of Civil Engineers.
History
Published online: Feb 1, 1995
Published in print: Feb 1995
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