Consolidation of a Double-Layered Compressible Foundation Partially Penetrated by Deep Mixed Columns
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 134, Issue 8
Abstract
Deep mixed columns often penetrate partially into the soft soil as floating columns due to the depth of the end-bearing layer. Partially penetrated soft soil by columns and the underlying compressible soft soil create a double-layered compressible foundation. So far, no reasonable solution is available to estimate the consolidation of such a double-layered foundation. This paper proposes an analytical solution for consolidation of a double-layered compressible foundation partially penetrated by deep mixed columns considering one-side or two-side vertical drainage The Laplace transform method was used to solve the consolidation equation for the double-layered system while Stehfest’s algorithm was used to solve the inverse Laplace transform for time-dependent loading. A consolidation algorithm was used to calculate the time-settlement relationship of an embankment constructed upon the double-layered foundation partially penetrated by deep mixed columns. The calculated settlements were compared well with field measurements.
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Acknowledgments
The writers appreciate the financial support provided by the National Natural Science Foundation of China (NSFC) (Award No. NSFC50478072) for this work. The writers wish to express their appreciation to Prof. Jie Han at the University of Kansas for his many constructive suggestions and improvement of this paper.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 134 • Issue 8 • August 2008
Pages: 1210 - 1214
Copyright
© 2008 American Society of Civil Engineers.
History
Received: Mar 28, 2006
Accepted: Oct 3, 2007
Published online: Aug 1, 2008
Published in print: Aug 2008
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