Interference of Two Closely Spaced Strip Footings on Sand Using Model Tests
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Volume 135, Issue 4
Abstract
By using small scale model tests, the interference effect on the ultimate bearing capacity of two closely spaced strip footings, placed on the surface of dry sand, was investigated. At any time, the footings were assumed to (1) carry exactly the same magnitude of load; and (2) settle to the same extent. No tilt of the footing was allowed. The effect of clear spacing (s) between two footings was explicitly studied. An interference of footings leads to a significant increase in their bearing capacity; the interference effect becomes even more substantial with an increase in the relative density of sand. The bearing capacity attains a peak magnitude at a certain (critical) spacing between two footings. The experimental observations presented in this technical note were similar to those given by different available theories. However, in a quantitative sense, the difference between the experiments and theories was seen to be still significant and it emphasizes the need of doing a further rigorous analysis in which the effect of stress level on the shear strength parameters of soil mass can be incorporated properly.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 135 • Issue 4 • April 2009
Pages: 595 - 604
Copyright
© 2009 ASCE.
History
Received: Apr 12, 2007
Accepted: May 31, 2008
Published online: Apr 1, 2009
Published in print: Apr 2009
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