Sand Deformation around an Uplift Plate Anchor
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 138, Issue 6
Abstract
This paper presents an experimental investigation on soil deformation around uplift plate anchors in sand by using digital image correlation (DIC). The experimental setup consists of a camera, loading frame, plexiglass mold, and computer, which is developed to capture soil deformation during anchor uplifting. A series of model tests are performed to investigate the influence of particle size, soil density, and anchor embedment depth on soil deformation. A set of images captured during anchor uplifting are used to calculate soil displacement fields by DIC. The failure surface is studied by tracking the points with maximum shear strain values. On the basis of this study, it is found that soil deformation and the pullout resistance of plate anchors are substantially influenced by soil density and anchor embedment depth, whereas particle size within the studied range has limited influence. In dense sand, the shape of the failure surface changes from a truncated cone above a shallow anchor to a combined shape of a curved cone and a truncated cone for a deep anchor. In contrast, in loose sand a cone-shaped failure surface is formed within the soil mass above a shallow anchor; however, no failure surface is observed for a deep anchor, where the compressibility of soil is the dominating factor that influences the behavior of deep plate anchors in loose sand.
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Acknowledgments
The authors acknowledge the financial support of a seed fund awarded to the first author by Ryerson Univ. and a Discovery Grant No. 355425 from the Natural Sciences and Engineering Research Council of Canada. The authors also want to thank the China Scholarship Council for the scholarship awarded to the second author during his one-year study at Ryerson Univ. The constructive comments and suggestions from two reviewers and Dr. Xingnian Chen, Dr. Wanghua Sui, and Ms. Hongmei Gao, and editorial help from Ms. Monica Rivera, are greatly appreciated.
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Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 138 • Issue 6 • June 2012
Pages: 728 - 737
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Sep 24, 2009
Accepted: Sep 7, 2011
Published online: Sep 9, 2011
Published in print: Jun 1, 2012
Published ahead of production: Jun 15, 2012
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