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Effect of spatial variability on the bearing capacity of cement-treated ground

Author(s)
Kasama, Kiyonobu; Zen, Kouki; Whittle, Andrew
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Abstract
This paper presents a reliability assessment for the undrained bearing capacity of a surface strip foundation based on the results of a probabilistic study in which the shear strength and unit weight of cement-treated ground are represented as random fields in Monte Carlo simulations of undrained stability using numerical limit analyses. The results show how the bearing capacity is related to the coefficient of variation and correlation length scale in both shear strength and unit weight. Based on the results, the authors propose an overdesign factor, tolerable percentage of defective core specimens, and resistance factors for LRFD ultimate limit state of surface footings on cement-treated ground in order to achieve a target reliability index and probability of failure. The proposed method is illustrated through example calculations based on the spatial variation of unconfined compressive strength measured using a variety of cement-mixing methods from projects in Japan.
Date issued
2012-09
URI
http://hdl.handle.net/1721.1/91637
Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
Journal
Soils and Foundations
Publisher
The Japanese Geotechnical Society
Citation
Kasama, Kiyonobu, Andrew J. Whittle, and Kouki Zen. “Effect of Spatial Variability on the Bearing Capacity of Cement-Treated Ground.” Soils and Foundations 52, no. 4 (August 2012): 600–619. © 2012 The Japanese Geotechnical Society
Version: Final published version
ISSN
00380806
1881-1418

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