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A Constitutive Relationship for Gravelly Soil Considering Fine Particle Suffusion

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 comprehensi...

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Autores principales: Zhang, Yuning, Chen, Yulong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5667023/
https://www.ncbi.nlm.nih.gov/pubmed/29065532
http://dx.doi.org/10.3390/ma10101217
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author Zhang, Yuning
Chen, Yulong
author_facet Zhang, Yuning
Chen, Yulong
author_sort Zhang, Yuning
collection PubMed
description 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.
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spelling pubmed-56670232017-11-09 A Constitutive Relationship for Gravelly Soil Considering Fine Particle Suffusion Zhang, Yuning Chen, Yulong Materials (Basel) Article 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. MDPI 2017-10-23 /pmc/articles/PMC5667023/ /pubmed/29065532 http://dx.doi.org/10.3390/ma10101217 Text en © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhang, Yuning
Chen, Yulong
A Constitutive Relationship for Gravelly Soil Considering Fine Particle Suffusion
title A Constitutive Relationship for Gravelly Soil Considering Fine Particle Suffusion
title_full A Constitutive Relationship for Gravelly Soil Considering Fine Particle Suffusion
title_fullStr A Constitutive Relationship for Gravelly Soil Considering Fine Particle Suffusion
title_full_unstemmed A Constitutive Relationship for Gravelly Soil Considering Fine Particle Suffusion
title_short A Constitutive Relationship for Gravelly Soil Considering Fine Particle Suffusion
title_sort constitutive relationship for gravelly soil considering fine particle suffusion
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5667023/
https://www.ncbi.nlm.nih.gov/pubmed/29065532
http://dx.doi.org/10.3390/ma10101217
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