Influence of Shear on Permeability of Clayey Soil
Publication: International Journal of Geomechanics
Volume 16, Issue 5
Abstract
The variation of stress–strain state induces changes in the permeability of clayey soil and then affects the properties of seepage and consolidation. In previous studies, variations of the permeability of soil in shear process were mainly neglected, and there were no reasonable descriptions of the permeability in such a condition. To study the variation of the hydraulic conductivity of clayey soil in shear process, new triaxial seepage equipment was designed by changing the conventional triaxial apparatus. Based on a series of tests under different confining pressures carried out by this equipment, the influences of the stress–strain state of clayey soil on hydraulic conductivity were investigated. Furthermore, a mathematical model for the hydraulic conductivity of clayey soil under the condition of large shear deformation was proposed. The comparison between the seepage test results and the calculated values of the proposed model indicates that the mathematical model can calibrate the effects of the void ratio and the mesostructure on the hydraulic conductivity of soil in shear process very well.
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Acknowledgments
The authors thank the financial support of the National Natural Science Foundation of China (#51379103 and 51179092) and the State Key Laboratory of Hydroscience and Engineering (Project #2013-KY-4).
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Information & Authors
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Published In
International Journal of Geomechanics
Volume 16 • Issue 5 • October 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Oct 28, 2014
Accepted: Nov 19, 2015
Published online: Feb 3, 2016
Discussion open until: Jul 3, 2016
Published in print: Oct 1, 2016
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