Lateral Vibration of Helical and Driven Steel Piles Installed in Clayey Soil
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 144, Issue 9
Abstract
This paper presents the results of forced and free horizontal vibration tests conducted on 9.0-m long and 324-mm shaft diameter single and double-helix large-capacity helical piles as well as a driven steel pipe pile of the same geometrical properties. The soil static and dynamic properties were determined from field and laboratory testing. Forced vibrations involved excitation forces with varying amplitudes. The experimental results provided insights into the dynamic pile–soil interaction for large-capacity helical piles installed in structured clayey soils. The dynamic behavior of helical piles was essentially similar to that of the driven pile, with insignificant effect from helices. The piles exhibited slight to moderate nonlinear behavior. An equivalent-linear analytical model of the pile–soil system was developed incorporating an annular zone around the pile with reduced shear modulus and accounting for pile–soil separation. The results from the model agreed well with the measured responses.
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Acknowledgments
The research described in this paper received direct support from NSERC, University of Western Ontario, and Almita Pilling, Canada, and Benha University, Egypt.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 144 • Issue 9 • September 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Jun 22, 2017
Accepted: Jan 10, 2018
Published online: Jun 27, 2018
Published in print: Sep 1, 2018
Discussion open until: Nov 27, 2018
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