Load-Settlement Mechanism of Shallow Foundations Rested on Saturated Sand with Upward Seepage
Publication: International Journal of Geomechanics
Volume 17, Issue 3
Abstract
In this study, the ultimate bearing capacity and settlement of square and strip foundations in the presence of upward seepage were assessed using physical modeling. The experiments were conducted in two series with different loading values of excess pore-water-pressure paths. The experimental results demonstrate significant degradation of bearing capacity resulting from excess pore-pressure development; however, a remarkable amount of soil strength was observed when the excess pore-pressure ratio was unity in the free-field ground. A correction coefficient (fγ) for the bearing-capacity factor Nγ was estimated based on the results. This factor is a function of upward-seepage magnitude. Based on the experimental results, dimensionless charts are presented to predict the settlement of square and strip footings rested on saturated sand with varied amounts of excess pore-water pressure. Results show strong dependency of settlement on the bearing-capacity safety factor presumed for the foundation design.
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Acknowledgments
The results of this paper were produced as part of a research project contract between the International Institute of Earthquake Engineering and Seismology (IIEES) of Iran and the Construction & Development of Transportation Infrastructures Company of Iran under Project GEO-93-001. This support is gratefully acknowledged.
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Published In
International Journal of Geomechanics
Volume 17 • Issue 3 • March 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Oct 7, 2015
Accepted: Jun 28, 2016
Published online: Aug 18, 2016
Discussion open until: Jan 18, 2017
Published in print: Mar 1, 2017
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