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Title:

"Detection Limits of Integrity Testing "
Authors: A.J.G. Schellingerhout and T.K. Muller

Published in:

Proceedings of the Stresswave Conference 1996
Abstract: Integrity testing is a widely used measurement method to characterise pile diameter changes. This paper discusses a type of defect which consists of a reduction of pile cross section over a short length. The results are obtained by computer model simulation based on the one dimensional wave propagation theory. The simulations show that the spring stiffness of the pile defect is a better predictor for the reflection amplitude than the impedance change. Also is shown that defects with an equal stiffness have an almost identical reflection shape and amplitude which makes the unique determination of the shape of the defect in the pile impossible.
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