Effects of sliding liquefaction on homogeneous loess landslides in western China

Abstract Sliding liquefaction is considered to be the cause of high-speed and long-distance sliding of some homogeneous loess landslides in western China. However, there is still a lack of necessary experimental research and analysis on the effects of sliding liquefaction on these landslides. In thi...

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Autores principales:	Yong Hong, Xianzhang Ling, Keqiang He
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e2f1d62c5b1d42798d7d467c496ab8b6
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spelling	oai:doaj.org-article:e2f1d62c5b1d42798d7d467c496ab8b62021-12-02T17:30:53ZEffects of sliding liquefaction on homogeneous loess landslides in western China10.1038/s41598-021-91411-z2045-2322https://doaj.org/article/e2f1d62c5b1d42798d7d467c496ab8b62021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-91411-zhttps://doaj.org/toc/2045-2322Abstract Sliding liquefaction is considered to be the cause of high-speed and long-distance sliding of some homogeneous loess landslides in western China. However, there is still a lack of necessary experimental research and analysis on the effects of sliding liquefaction on these landslides. In this work, the effects of sliding liquefaction on irrigation-induced, high-speed and long-distance loess landslides on the South Jingyang Tableland area in China are studied by performing large-scale ring shear tests and using the sled mode. The results are as follows. (1) There are two kinds of long-runout sliding modes of loess landslides on the South Jingyang Tableland: sliding along the terrace surface and sliding within the saturated terrace alluvium, which is associated with sliding liquefaction. Both sliding modes can lead to long-runout sliding. (2) There are some differences in the inclination of the sliding surface between the two sliding modes. Based on the inclination of the sliding surface, the corresponding sliding mode can be distinguished. (3) Under the two sliding modes, the large shear mechanical properties of the two-layer soil composed of loess and alluvial sandy silt show significant differences. The friction between the loess and dry terrace alluvium increases with increasing normal stress and shear rate, while the friction between the loess and saturated terrace alluvium presents the opposite trend. The results show that the sliding distances under different sliding modes present opposite trends with the change in sliding speed. (4) Based on the test results from the ring shear tests and the morphological characteristics of the sliding surface, the sliding mode and sliding distance of a loess landslide can be identified and predicted.Yong HongXianzhang LingKeqiang HeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yong Hong Xianzhang Ling Keqiang He Effects of sliding liquefaction on homogeneous loess landslides in western China
description	Abstract Sliding liquefaction is considered to be the cause of high-speed and long-distance sliding of some homogeneous loess landslides in western China. However, there is still a lack of necessary experimental research and analysis on the effects of sliding liquefaction on these landslides. In this work, the effects of sliding liquefaction on irrigation-induced, high-speed and long-distance loess landslides on the South Jingyang Tableland area in China are studied by performing large-scale ring shear tests and using the sled mode. The results are as follows. (1) There are two kinds of long-runout sliding modes of loess landslides on the South Jingyang Tableland: sliding along the terrace surface and sliding within the saturated terrace alluvium, which is associated with sliding liquefaction. Both sliding modes can lead to long-runout sliding. (2) There are some differences in the inclination of the sliding surface between the two sliding modes. Based on the inclination of the sliding surface, the corresponding sliding mode can be distinguished. (3) Under the two sliding modes, the large shear mechanical properties of the two-layer soil composed of loess and alluvial sandy silt show significant differences. The friction between the loess and dry terrace alluvium increases with increasing normal stress and shear rate, while the friction between the loess and saturated terrace alluvium presents the opposite trend. The results show that the sliding distances under different sliding modes present opposite trends with the change in sliding speed. (4) Based on the test results from the ring shear tests and the morphological characteristics of the sliding surface, the sliding mode and sliding distance of a loess landslide can be identified and predicted.
format	article
author	Yong Hong Xianzhang Ling Keqiang He
author_facet	Yong Hong Xianzhang Ling Keqiang He
author_sort	Yong Hong
title	Effects of sliding liquefaction on homogeneous loess landslides in western China
title_short	Effects of sliding liquefaction on homogeneous loess landslides in western China
title_full	Effects of sliding liquefaction on homogeneous loess landslides in western China
title_fullStr	Effects of sliding liquefaction on homogeneous loess landslides in western China
title_full_unstemmed	Effects of sliding liquefaction on homogeneous loess landslides in western China
title_sort	effects of sliding liquefaction on homogeneous loess landslides in western china
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/e2f1d62c5b1d42798d7d467c496ab8b6
work_keys_str_mv	AT yonghong effectsofslidingliquefactiononhomogeneousloesslandslidesinwesternchina AT xianzhangling effectsofslidingliquefactiononhomogeneousloesslandslidesinwesternchina AT keqianghe effectsofslidingliquefactiononhomogeneousloesslandslidesinwesternchina
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Effects of sliding liquefaction on homogeneous loess landslides in western China

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