Analytical Study of Employing Low-Strain Lateral Pile Integrity Test on a Defective Extended Pile Shaft
Publication: Journal of Engineering Mechanics
Volume 146, Issue 9
Abstract
The lateral pile integrity test (LPIT) method, a low-strain nondestructive test technique, is employed in this paper to evaluate the integrity of an extended pile shaft supporting superstructure. An extended pile shaft with various defects is simulated by a Timoshenko beam (TB) model, and the lateral soil resistance is generalized as a beam-on-dynamic-Winkler-foundation (BDWF) model. The pile–soil model and presented solution are verified by rigorous finite-element analysis (FEA). The effects of pile defect and technical aspects of the LPIT method on the pile dynamic response are then investigated, and a practical method is proposed as well to evaluate the potential defect of an extended pile shaft on site. By comparing the actual arrival time of the pile toe reflection with the calibration value, it is possible to determine the type (stiff or weak) and extent (length or total length) of the pile defect.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the submitted article.
Acknowledgments
This research was supported by the National Natural Science Foundation of China (Grant Nos. 51378464, 51579217, and 51779217).
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Published In
Journal of Engineering Mechanics
Volume 146 • Issue 9 • September 2020
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Jul 13, 2019
Accepted: May 11, 2020
Published online: Jul 9, 2020
Published in print: Sep 1, 2020
Discussion open until: Dec 9, 2020
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