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Disturbance function for soil disturbed state strength based on X-ray computed tomography triaxial test

Soil is a porous, multiphase, and loose medium, which is prone to serious disturbance by the activity of biological livings, accompanied with cracks and macro pores. These phenomena greatly affect the strength of soil and the degradation of land. Two different quantifiable values from X-ray computed...

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Detalles Bibliográficos
Autores principales: Li, X., Wang, S. J., He, B. H., Chen, Y. Frank
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6497377/
https://www.ncbi.nlm.nih.gov/pubmed/31048863
http://dx.doi.org/10.1371/journal.pone.0215961
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author Li, X.
Wang, S. J.
He, B. H.
Chen, Y. Frank
author_facet Li, X.
Wang, S. J.
He, B. H.
Chen, Y. Frank
author_sort Li, X.
collection PubMed
description Soil is a porous, multiphase, and loose medium, which is prone to serious disturbance by the activity of biological livings, accompanied with cracks and macro pores. These phenomena greatly affect the strength of soil and the degradation of land. Two different quantifiable values from X-ray computed tomography (CT) images are usually used to define the disturbance function for soil disturbed state strength: mean density (MD value) and standard deviation (SD value). Two types of disturbance functions are investigated quantitatively by CT-triaxial testing using four samples with different macro-pore sizes (disturbed samples) and one sample without a macro-pore (undisturbed sample). It is found that the shear strength of three disturbed samples with the same macro-pore size is close to each other. As with the shear strength, the SD value and its defined disturbance function have a similar correlation with the cross-sectional area of macro-pore. However, the MD value and its defined disturbance function have no regularity with the macro-pore size. Therefore, the disturbance function expressed in terms of the SD value is deemed more reasonable and appropriate in analyzing the soil disturbed state strength using the quantitative CT morphometry. While, the disturbance function defined by the MD value has often been used to characterize a rock damage.
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spelling pubmed-64973772019-05-17 Disturbance function for soil disturbed state strength based on X-ray computed tomography triaxial test Li, X. Wang, S. J. He, B. H. Chen, Y. Frank PLoS One Research Article Soil is a porous, multiphase, and loose medium, which is prone to serious disturbance by the activity of biological livings, accompanied with cracks and macro pores. These phenomena greatly affect the strength of soil and the degradation of land. Two different quantifiable values from X-ray computed tomography (CT) images are usually used to define the disturbance function for soil disturbed state strength: mean density (MD value) and standard deviation (SD value). Two types of disturbance functions are investigated quantitatively by CT-triaxial testing using four samples with different macro-pore sizes (disturbed samples) and one sample without a macro-pore (undisturbed sample). It is found that the shear strength of three disturbed samples with the same macro-pore size is close to each other. As with the shear strength, the SD value and its defined disturbance function have a similar correlation with the cross-sectional area of macro-pore. However, the MD value and its defined disturbance function have no regularity with the macro-pore size. Therefore, the disturbance function expressed in terms of the SD value is deemed more reasonable and appropriate in analyzing the soil disturbed state strength using the quantitative CT morphometry. While, the disturbance function defined by the MD value has often been used to characterize a rock damage. Public Library of Science 2019-05-02 /pmc/articles/PMC6497377/ /pubmed/31048863 http://dx.doi.org/10.1371/journal.pone.0215961 Text en © 2019 Li et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Li, X.
Wang, S. J.
He, B. H.
Chen, Y. Frank
Disturbance function for soil disturbed state strength based on X-ray computed tomography triaxial test
title Disturbance function for soil disturbed state strength based on X-ray computed tomography triaxial test
title_full Disturbance function for soil disturbed state strength based on X-ray computed tomography triaxial test
title_fullStr Disturbance function for soil disturbed state strength based on X-ray computed tomography triaxial test
title_full_unstemmed Disturbance function for soil disturbed state strength based on X-ray computed tomography triaxial test
title_short Disturbance function for soil disturbed state strength based on X-ray computed tomography triaxial test
title_sort disturbance function for soil disturbed state strength based on x-ray computed tomography triaxial test
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6497377/
https://www.ncbi.nlm.nih.gov/pubmed/31048863
http://dx.doi.org/10.1371/journal.pone.0215961
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