Performance Evaluation of a Collapsible Soil Reinforced with Compacted Lateritic Soil Columns
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 145, Issue 9
Abstract
This study was carried out to evaluate a technique to improve lateritic soil layers that are susceptible to collapse upon wetting so that they can be used to support shallow foundations. Specifically, this study focused on the impact of placing groups of compacted lateritic soil columns within a collapsible soil layer, because this may be a more cost-effective alternative than excavating the entire collapsible soil layer and replacing it with a monolithic compacted fill. For this research, oedometer and centrifuge model tests were performed on a lateritic soil collected in the southeastern part of Brazil. The results of the centrifuge tests were used in a numerical analysis to examine the performance of shallow foundations on collapsible soils reinforced with compacted columns under inundated conditions. The experimental and numerical results indicate that such a technique can improve the load-displacement response of shallow foundations constructed on the soil tested and reduce wetting-induced collapse settlements.
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Acknowledgments
The authors would like to acknowledge the State of São Paulo Research Foundation (FAPESP) (Grant No. 2016/21601-0), the National Council for Scientific and Technological Development (CNPq) (Process 306675/2015-3), and the Coordination of Improvement of Higher Education Personnel (CAPES) (for granting the first author’s scholarship).
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 145 • Issue 9 • September 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Aug 2, 2018
Accepted: Feb 20, 2019
Published online: Jul 11, 2019
Published in print: Sep 1, 2019
Discussion open until: Dec 11, 2019
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