Numerical analysis of the precursory information of slope instability process with constant resistance bolt

Abstract The instability of slope has already threatened life and property safety of the people, and improving the monitoring method of slope stability has important theoretical and practical significance for disaster prevention and reduction. According to the idea of “Newton force sudden drop and c...

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Autores principales:	Feng Chen, Xue-bin Wang, Yan-hong Du, Chun-an Tang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6d7d0c666c7a457f93b8c158d3295247
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spelling	oai:doaj.org-article:6d7d0c666c7a457f93b8c158d32952472021-11-14T12:19:28ZNumerical analysis of the precursory information of slope instability process with constant resistance bolt10.1038/s41598-021-01387-z2045-2322https://doaj.org/article/6d7d0c666c7a457f93b8c158d32952472021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01387-zhttps://doaj.org/toc/2045-2322Abstract The instability of slope has already threatened life and property safety of the people, and improving the monitoring method of slope stability has important theoretical and practical significance for disaster prevention and reduction. According to the idea of “Newton force sudden drop and catastrophic occurrence” proposed by M.C. He in the landslide monitoring, a numerical model with constant resistance bolt has been established. Through numerical simulation research, it is found that the maximum principal stress, minimum principal stress and shear stress of the intersection point P of landslide surface and constant resistance bolt are sudden growth and sudden decrease, the vertical displacement and lateral displacement of this point P appear rise and fall before three kinds of stress. When loading to the next step of the step where three stress have reduced to a minimum value the slope is unstable and destroyed. At this time, the constant resistance bolt has undergone larger plastic deformation and damaged. Finally, comparing the stress curves and the acoustic emission (AE) curves, it can be seen that stress decreases from the maximum value and the AE curves begin to show a significant rise, the two curves display opposite law. It can be seen from the AE diagram that the failure mode of the slope is a combined tension and shear failure. The numerical test results provide a new idea for real-time monitoring and forecasting of slope.Feng ChenXue-bin WangYan-hong DuChun-an TangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Feng Chen Xue-bin Wang Yan-hong Du Chun-an Tang Numerical analysis of the precursory information of slope instability process with constant resistance bolt
description	Abstract The instability of slope has already threatened life and property safety of the people, and improving the monitoring method of slope stability has important theoretical and practical significance for disaster prevention and reduction. According to the idea of “Newton force sudden drop and catastrophic occurrence” proposed by M.C. He in the landslide monitoring, a numerical model with constant resistance bolt has been established. Through numerical simulation research, it is found that the maximum principal stress, minimum principal stress and shear stress of the intersection point P of landslide surface and constant resistance bolt are sudden growth and sudden decrease, the vertical displacement and lateral displacement of this point P appear rise and fall before three kinds of stress. When loading to the next step of the step where three stress have reduced to a minimum value the slope is unstable and destroyed. At this time, the constant resistance bolt has undergone larger plastic deformation and damaged. Finally, comparing the stress curves and the acoustic emission (AE) curves, it can be seen that stress decreases from the maximum value and the AE curves begin to show a significant rise, the two curves display opposite law. It can be seen from the AE diagram that the failure mode of the slope is a combined tension and shear failure. The numerical test results provide a new idea for real-time monitoring and forecasting of slope.
format	article
author	Feng Chen Xue-bin Wang Yan-hong Du Chun-an Tang
author_facet	Feng Chen Xue-bin Wang Yan-hong Du Chun-an Tang
author_sort	Feng Chen
title	Numerical analysis of the precursory information of slope instability process with constant resistance bolt
title_short	Numerical analysis of the precursory information of slope instability process with constant resistance bolt
title_full	Numerical analysis of the precursory information of slope instability process with constant resistance bolt
title_fullStr	Numerical analysis of the precursory information of slope instability process with constant resistance bolt
title_full_unstemmed	Numerical analysis of the precursory information of slope instability process with constant resistance bolt
title_sort	numerical analysis of the precursory information of slope instability process with constant resistance bolt
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/6d7d0c666c7a457f93b8c158d3295247
work_keys_str_mv	AT fengchen numericalanalysisoftheprecursoryinformationofslopeinstabilityprocesswithconstantresistancebolt AT xuebinwang numericalanalysisoftheprecursoryinformationofslopeinstabilityprocesswithconstantresistancebolt AT yanhongdu numericalanalysisoftheprecursoryinformationofslopeinstabilityprocesswithconstantresistancebolt AT chunantang numericalanalysisoftheprecursoryinformationofslopeinstabilityprocesswithconstantresistancebolt
_version_	1718429292918996992

Numerical analysis of the precursory information of slope instability process with constant resistance bolt

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