Drained Monotonic Responses of Suffusional Cohesionless Soils
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Volume 141, Issue 8
Abstract
Mechanical consequences of suffusion on the noncohesive soils with various initial fine contents under different initial effective confining pressures are presented in this paper. By using the modified triaxial permeameter, seepage tests and successive drained monotonic compression tests are performed. It is found that soil-drained strength decreases after suffusion and a temporary drop in stiffness at the initial stage of shearing with respect to the axial strain ranging from 0 to 1% is observed. The tests suggest that suffusion might create a distinct packing of soil grains, which might result from possible accumulation of fine grains at the spots where the constriction size—representing the size of pore channels in a soil—is smaller than that of fines. Those surviving fines after suffusion may function as reinforcement or jamming at the subsequent compression, resulting in a larger initial stiffness of the suffusional soils.
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Acknowledgments
The first author acknowledges the scholarship support of the Japanese Government (Monbukagakusho: MEXT) for performing this research. This work was supported by JSPS KAKENHI Grant No. 25420498.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 141 • Issue 8 • August 2015
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Aug 11, 2014
Accepted: Mar 3, 2015
Published online: Apr 10, 2015
Published in print: Aug 1, 2015
Discussion open until: Sep 10, 2015
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