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Materials 2017, 10(10), 1217; doi:10.3390/ma10101217

A Constitutive Relationship for Gravelly Soil Considering Fine Particle Suffusion

1,†
and
2,†,*
1
School of Civil and Architectural Engineering, Yangtze Normal University, Chongqing 408100, China
2
State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 18 September 2017 / Revised: 13 October 2017 / Accepted: 19 October 2017 / Published: 23 October 2017
(This article belongs to the Section Porous Materials)
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Abstract

Suffusion erosion may occur in sandy gravel dam foundations that use suspended cutoff walls. This erosion causes a loss of fine particles, degrades the soil strength and deformation moduli, and adversely impacts the cutoff walls of the dam foundation, as well as the overlying dam body. A comprehensive evaluation of these effects requires models that quantitatively describe the effects of fine particle losses on the stress-strain relationships of sandy gravels. In this work, we propose an experimental scheme for studying these types of models, and then perform triaxial and confined compression tests to determine the effects of particle losses on the stress-strain relationships. Considering the Duncan-Chang E-B model, quantitative expressions describing the relationship between the parameters of the model and the particle losses were derived. The results show that particle losses did not alter the qualitative stress-strain characteristics of the soils; however, the soil strength and deformation moduli were degraded. By establishing the relationship between the parameters of the model and the losses, the same model can then be used to describe the relationship between sandy gravels and erosion levels that vary in both time and space. View Full-Text
Keywords: suffusion; fine particle losses; gravelly soil; constitutive model suffusion; fine particle losses; gravelly soil; constitutive model
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zhang, Y.; Chen, Y. A Constitutive Relationship for Gravelly Soil Considering Fine Particle Suffusion. Materials 2017, 10, 1217.

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