Effects of Spatial Correlation on the Compression Behavior of a Cement-Treated Column
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 139, Issue 8
Abstract
The strength of soil treated by cement deep mixing varies greatly, even at a single column, because of the variability of in situ soil properties, the variability of mixing effectiveness, and other factors. The variation in strength would affect the entire behavior of the cement-treated column. This paper presents a numerical experiment that investigates the effect of spatial correlation on the unconfined compressive strength of cement-treated columns. Finite element analyses incorporating random-field theory were performed to simulate the unconfined compression behavior of full-scale column samples in which the material properties vary with respect to spatial autocorrelation. The numerical results indicate that spatial autocorrelation affects the compression behavior of full-scale cement-treated columns. The overall strength of the sample in the absence of spatial autocorrelation is slightly lower than that of the uniform sample of mean strength. On the other hand, the overall strength of the sample in the presence of spatial autocorrelation is significantly lower than that of the uniform sample of mean strength. These results suggest that spatial autocorrelation should be considered when evaluating the overall strength of full-scale cement-treated columns within a relevant design procedure.
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Acknowledgments
The authors are grateful to Takenaka Corporation for cooperation in the numerical analysis. The authors acknowledge the support of the Ministry of Science and Education of Japan (Grant No. 22560505).
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Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 139 • Issue 8 • August 2013
Pages: 1346 - 1359
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Oct 20, 2011
Accepted: Oct 2, 2012
Published online: Oct 4, 2012
Published in print: Aug 1, 2013
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