Behavior of Eccentrically Loaded Small-Scale Ring Footings Resting on Reinforced Layered Soil
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 138, Issue 3
Abstract
This paper presents an experimental study of the behavior of an eccentrically loaded model ring footing resting on a compacted replaced layer of sand that overlies an extended layer of loose sand. Particular emphasis is placed on the potential benefits of reinforcing the replaced sand layer with geogrid reinforcement. Load configuration was designed to simulate ring footings under vertical loads and overturning moment caused by lateral loads. Several configurations of geogrid layers, number, and stiffness were used to study ring footings with different inner-to-outer-diameter ratios and load eccentricities. The effect of the depth and the relative density of the replaced sand layer was also investigated. Test results indicate that the behavior of an eccentrically loaded ring footing significantly improves with an increase in the depth and the relative density of the replaced compacted sand layer. However, the inclusion of soil reinforcement not only leads to a significant reduction in the depth of the replaced sand layer but also causes a considerable increase in the bearing capacities of the eccentrically loaded rings, leading to the cost-effective design of the footings. On the basis of the test results, the effects of different parameters are presented and discussed.
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Acknowledgments
The tests were performed in the Soil Mechanics Laboratory of the Structural Engineering Department, University of Tanta, which is acknowledged.
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Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 138 • Issue 3 • March 2012
Pages: 376 - 384
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Aug 4, 2010
Accepted: Jun 28, 2011
Published online: Jun 30, 2011
Published in print: Mar 1, 2012
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