Effects of root spatial distribution on the elastic-plastic properties of soil-root blocks

Abstract Plant roots significantly influence soil properties, especially in soil beyond the limited area surrounding the main root stem. Some bias results may be generated if plastic properties of soil are merely used in evaluating slope stability without considering the effects of plant roots. In t...

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Autores principales:	Yunpeng Li, Yunqi Wang, Yujie Wang, Chao Ma
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ce0ad581b8f34256ba4496d7ae16762b
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id	oai:doaj.org-article:ce0ad581b8f34256ba4496d7ae16762b
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spelling	oai:doaj.org-article:ce0ad581b8f34256ba4496d7ae16762b2021-12-02T12:30:33ZEffects of root spatial distribution on the elastic-plastic properties of soil-root blocks10.1038/s41598-017-00924-z2045-2322https://doaj.org/article/ce0ad581b8f34256ba4496d7ae16762b2017-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00924-zhttps://doaj.org/toc/2045-2322Abstract Plant roots significantly influence soil properties, especially in soil beyond the limited area surrounding the main root stem. Some bias results may be generated if plastic properties of soil are merely used in evaluating slope stability without considering the effects of plant roots. In this research, effects of root spatial distribution on the elastic-plastic characteristics of soil-root blocks were examined. Triaxial tests and the Duncan-Chang model were used to analyze the correlation between root spatial characteristics and soil elastic-plastic properties. Safety factors of vegetated slopes were calculated to investigate the effect of roots on slope stability. The limit stress of remoulded soil was 103.52% to 231.61% greater than undisturbed soil in shallow soil layers. Increased root quantity led to an increased the failure ratio of soil bulk and the initial tangent modulus increased with root diameter. When calculating the safety factor of vegetated slopes, soil indexes for soil beyond the small cylinder surrounding the main stem should be properly considered to avoid safety factor overestimation.Yunpeng LiYunqi WangYujie WangChao MaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yunpeng Li Yunqi Wang Yujie Wang Chao Ma Effects of root spatial distribution on the elastic-plastic properties of soil-root blocks
description	Abstract Plant roots significantly influence soil properties, especially in soil beyond the limited area surrounding the main root stem. Some bias results may be generated if plastic properties of soil are merely used in evaluating slope stability without considering the effects of plant roots. In this research, effects of root spatial distribution on the elastic-plastic characteristics of soil-root blocks were examined. Triaxial tests and the Duncan-Chang model were used to analyze the correlation between root spatial characteristics and soil elastic-plastic properties. Safety factors of vegetated slopes were calculated to investigate the effect of roots on slope stability. The limit stress of remoulded soil was 103.52% to 231.61% greater than undisturbed soil in shallow soil layers. Increased root quantity led to an increased the failure ratio of soil bulk and the initial tangent modulus increased with root diameter. When calculating the safety factor of vegetated slopes, soil indexes for soil beyond the small cylinder surrounding the main stem should be properly considered to avoid safety factor overestimation.
format	article
author	Yunpeng Li Yunqi Wang Yujie Wang Chao Ma
author_facet	Yunpeng Li Yunqi Wang Yujie Wang Chao Ma
author_sort	Yunpeng Li
title	Effects of root spatial distribution on the elastic-plastic properties of soil-root blocks
title_short	Effects of root spatial distribution on the elastic-plastic properties of soil-root blocks
title_full	Effects of root spatial distribution on the elastic-plastic properties of soil-root blocks
title_fullStr	Effects of root spatial distribution on the elastic-plastic properties of soil-root blocks
title_full_unstemmed	Effects of root spatial distribution on the elastic-plastic properties of soil-root blocks
title_sort	effects of root spatial distribution on the elastic-plastic properties of soil-root blocks
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/ce0ad581b8f34256ba4496d7ae16762b
work_keys_str_mv	AT yunpengli effectsofrootspatialdistributionontheelasticplasticpropertiesofsoilrootblocks AT yunqiwang effectsofrootspatialdistributionontheelasticplasticpropertiesofsoilrootblocks AT yujiewang effectsofrootspatialdistributionontheelasticplasticpropertiesofsoilrootblocks AT chaoma effectsofrootspatialdistributionontheelasticplasticpropertiesofsoilrootblocks
_version_	1718394361767526400

Effects of root spatial distribution on the elastic-plastic properties of soil-root blocks

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