Vertical Uplift Resistance of a Group of Two Coaxial Anchors in Clay
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 138, Issue 3
Abstract
The vertical uplift resistance for a group of two horizontal coaxial rigid strip anchors embedded in clay under undrained condition has been determined by using the upper bound theorem of limit analysis in combination with finite elements. An increase of undrained shear strength of soil mass with depth has been incorporated. The uplift factor has been computed. As compared to a single isolated anchor, a group of two anchors provides greater magnitude of the uplift resistance. For a given embedment ratio, the group of two anchors generates almost the maximum uplift resistance when the upper anchor is located midway between ground surface and the lower anchor. For a given embedment ratio, increases linearly with an increase in the normalized unit weight of soil mass up to a certain value before attaining a certain maximum magnitude; the maximum value of increases with an increase in embedment ratio.
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Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 138 • Issue 3 • March 2012
Pages: 419 - 422
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Sep 9, 2010
Accepted: Jul 8, 2011
Published online: Jul 11, 2011
Published in print: Mar 1, 2012
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