Bearing Capacity of Foundations with Inclusion of Dense Sand Layer over Loose Sand Strata
Publication: International Journal of Geomechanics
Volume 17, Issue 10
Abstract
The lower- and upper-bound finite-element limit analysis in conjunction with second-order conic programming (SOCP) was used to estimate the ultimate bearing capacity of strip and circular footings with an inclusion of a layer of dense sand over existing loose sand strata. The analysis followed the Mohr-Coulomb yield criterion and an associated flow rule. The results are expressed in terms of an efficiency factor that increases quite significantly with increases in the (1) thickness and (2) friction angle of the upper densified layer. While keeping the same thickness of the upper dense sand layer, the circular footing exhibits greater efficiency-factor values as compared to strip footing. The numerical results compare well with data available from the literature.
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Information & Authors
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Published In
International Journal of Geomechanics
Volume 17 • Issue 10 • October 2017
Copyright
© 2017 American Society of Civil Engineers.
History
Received: Aug 26, 2016
Accepted: Apr 28, 2017
Published online: Jul 21, 2017
Published in print: Oct 1, 2017
Discussion open until: Dec 21, 2017
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