Response of Cast-in-Steel-Shell Pile in Liquefied Soil under Lateral Loading
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VIEW THE REPLYPublication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 131, Issue 1
Abstract
This paper presents results from a full-scale lateral load test on a cast-in-steel-shell (CISS) pile in sand liquefied by controlled blasting. Lateral loads were applied by a hydraulic actuator to simulate seismic inertial forces. The CISS pile was instrumented to provide the data necessary for back calculating lateral soil resistance and displacement. Details of the pile instrumentation and testing procedure are described. The back-calculated soil resistance and displacement are presented as curves and compared to static sand curves. Results from three simplified analyses are presented, where liquefied soil resistance was accounted for by modifying standard static curves, and compared to measured test results. Limitations of the simplified methods are discussed. Test results show the blast induced liquefied sand did not provide resistance to lateral pile movement at displacements up to . At displacements of sufficient magnitude, a phase transformation in the sand occurred resulting in a reduction in pore water pressure, and increased lateral soil resistance. The shape of the back-calculated curves for liquefied sand is significantly different from the shape of standard curves. As a result, the modified standard curves do not adequately model the liquefied soil response. Consequently, results from simplified analyses vary from conservative to non-conservative as displacement levels increase.
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Acknowledgments
The writers wish to thank the sponsors of this project: Caltrans (lead agency), Alaska DOTPF, Missouri DOT, New York DOT, Oregon DOT, Utah DOT, and Washington State DOT, as well as other project participants including the United States Navy, the City of San Francisco, Lancaster Composites, and Foundation Constructors, Condon-Johnson, Kleinfelder, and URS.
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Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 131 • Issue 1 • January 2005
Pages: 94 - 102
Copyright
© 2004 ASCE.
History
Received: Mar 31, 2003
Accepted: Oct 27, 2003
Published online: Jan 1, 2005
Published in print: Jan 2005
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