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Flow–solid coupling analysis of underground reinforced concrete forked pipe enclosing rock and structure

The stability of the surrounding rock for the construction excavation and the reinforcement of the lining structure during operation in the water-rich area is a difficult problem for the design of high-head underground turnout pipes. Firstly, according to the mechanism of excavation load release and...

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Autores principales: Xiao, Ming, Yuan, Qingteng, Zhao, Binxin, Deng, Liang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10560679/
https://www.ncbi.nlm.nih.gov/pubmed/37807016
http://dx.doi.org/10.1038/s41598-023-44148-w
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author Xiao, Ming
Yuan, Qingteng
Zhao, Binxin
Deng, Liang
author_facet Xiao, Ming
Yuan, Qingteng
Zhao, Binxin
Deng, Liang
author_sort Xiao, Ming
collection PubMed
description The stability of the surrounding rock for the construction excavation and the reinforcement of the lining structure during operation in the water-rich area is a difficult problem for the design of high-head underground turnout pipes. Firstly, according to the mechanism of excavation load release and surrounding rock damage evolution, the seepage effect of excavation in the construction of the forked caves is coupled to the surrounding rock stress damage, and an iterative method of numerical simulation of the coupled mutual feedback effect of excavation surrounding rock stress and seepage is proposed. Then, based on the cracking characteristics of the high internal water pressure reinforced concrete turnpike lining, a numerical analysis method of the coupling interaction between lining cracking and internal water seepage is proposed by coupling internal water seepage to stress damage in the lining by cracking the forked pipe structure. Applying the aforementioned method to a forked pipe project, the results show that: during the construction period, there is a significant increase in the damage zone, stress, and displacement of the rock around the cavern after considering the coupled iterations; during the operation period, with the increase in internal water pressure, the lining structure accelerates cracking due to the external infiltration of internal water; after the internal water is applied, the surrounding rock bears the main internal water pressure and the reinforcement bears only part of the circumferential force. The method provides theoretical support for the analysis and calculation of the reinforcement of similar underground high-pressure tunnels for rock support and lining structures and has certain theoretical and engineering significance.
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spelling pubmed-105606792023-10-10 Flow–solid coupling analysis of underground reinforced concrete forked pipe enclosing rock and structure Xiao, Ming Yuan, Qingteng Zhao, Binxin Deng, Liang Sci Rep Article The stability of the surrounding rock for the construction excavation and the reinforcement of the lining structure during operation in the water-rich area is a difficult problem for the design of high-head underground turnout pipes. Firstly, according to the mechanism of excavation load release and surrounding rock damage evolution, the seepage effect of excavation in the construction of the forked caves is coupled to the surrounding rock stress damage, and an iterative method of numerical simulation of the coupled mutual feedback effect of excavation surrounding rock stress and seepage is proposed. Then, based on the cracking characteristics of the high internal water pressure reinforced concrete turnpike lining, a numerical analysis method of the coupling interaction between lining cracking and internal water seepage is proposed by coupling internal water seepage to stress damage in the lining by cracking the forked pipe structure. Applying the aforementioned method to a forked pipe project, the results show that: during the construction period, there is a significant increase in the damage zone, stress, and displacement of the rock around the cavern after considering the coupled iterations; during the operation period, with the increase in internal water pressure, the lining structure accelerates cracking due to the external infiltration of internal water; after the internal water is applied, the surrounding rock bears the main internal water pressure and the reinforcement bears only part of the circumferential force. The method provides theoretical support for the analysis and calculation of the reinforcement of similar underground high-pressure tunnels for rock support and lining structures and has certain theoretical and engineering significance. Nature Publishing Group UK 2023-10-08 /pmc/articles/PMC10560679/ /pubmed/37807016 http://dx.doi.org/10.1038/s41598-023-44148-w Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Xiao, Ming
Yuan, Qingteng
Zhao, Binxin
Deng, Liang
Flow–solid coupling analysis of underground reinforced concrete forked pipe enclosing rock and structure
title Flow–solid coupling analysis of underground reinforced concrete forked pipe enclosing rock and structure
title_full Flow–solid coupling analysis of underground reinforced concrete forked pipe enclosing rock and structure
title_fullStr Flow–solid coupling analysis of underground reinforced concrete forked pipe enclosing rock and structure
title_full_unstemmed Flow–solid coupling analysis of underground reinforced concrete forked pipe enclosing rock and structure
title_short Flow–solid coupling analysis of underground reinforced concrete forked pipe enclosing rock and structure
title_sort flow–solid coupling analysis of underground reinforced concrete forked pipe enclosing rock and structure
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10560679/
https://www.ncbi.nlm.nih.gov/pubmed/37807016
http://dx.doi.org/10.1038/s41598-023-44148-w
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