Study on thermal insulation and seismic effect for fault-crossing tunnel in high geothermal area

The fault-crossing tunnel in high geothermal areas can be severely damaged under strong earthquake. In this paper, numerical models were established in Flac(3d) to investigate the thermal insulation and seismic effects under the strong earthquake when using highly damped composite structure. The res...

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Autores principales: Cui, Guangyao, Shi, Wenhao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9256594/
https://www.ncbi.nlm.nih.gov/pubmed/35790872
http://dx.doi.org/10.1038/s41598-022-15626-4
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author Cui, Guangyao
Shi, Wenhao
author_facet Cui, Guangyao
Shi, Wenhao
author_sort Cui, Guangyao
collection PubMed
description The fault-crossing tunnel in high geothermal areas can be severely damaged under strong earthquake. In this paper, numerical models were established in Flac(3d) to investigate the thermal insulation and seismic effects under the strong earthquake when using highly damped composite structure. The results showed that the thermal insulation effect of the PC, the PC highly damped composite structure and the SFRC highly damped composite structure were almost the same, which the PC highly damped composite structure was slightly better. After applying the highly damped composite structure, the maximum and minimum principal stresses on the lining decreased, it showed that highly damped composite structure could enhance the seismic effect of tunnel. The safety factor of SFRC highly damped composite structure was 2.420, which was a 28.14% increase compared to PC. Based on numerical simulations, the thermal insulation and seismic effect of SFRC highly damped composite structure was better than other seismic measures. The research can provide a reference for the design of thermal insulation and anti-earthquake for fault-crossing tunnel under strong earthquake in high geothermal area.
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spelling pubmed-92565942022-07-07 Study on thermal insulation and seismic effect for fault-crossing tunnel in high geothermal area Cui, Guangyao Shi, Wenhao Sci Rep Article The fault-crossing tunnel in high geothermal areas can be severely damaged under strong earthquake. In this paper, numerical models were established in Flac(3d) to investigate the thermal insulation and seismic effects under the strong earthquake when using highly damped composite structure. The results showed that the thermal insulation effect of the PC, the PC highly damped composite structure and the SFRC highly damped composite structure were almost the same, which the PC highly damped composite structure was slightly better. After applying the highly damped composite structure, the maximum and minimum principal stresses on the lining decreased, it showed that highly damped composite structure could enhance the seismic effect of tunnel. The safety factor of SFRC highly damped composite structure was 2.420, which was a 28.14% increase compared to PC. Based on numerical simulations, the thermal insulation and seismic effect of SFRC highly damped composite structure was better than other seismic measures. The research can provide a reference for the design of thermal insulation and anti-earthquake for fault-crossing tunnel under strong earthquake in high geothermal area. Nature Publishing Group UK 2022-07-05 /pmc/articles/PMC9256594/ /pubmed/35790872 http://dx.doi.org/10.1038/s41598-022-15626-4 Text en © The Author(s) 2022 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
Cui, Guangyao
Shi, Wenhao
Study on thermal insulation and seismic effect for fault-crossing tunnel in high geothermal area
title Study on thermal insulation and seismic effect for fault-crossing tunnel in high geothermal area
title_full Study on thermal insulation and seismic effect for fault-crossing tunnel in high geothermal area
title_fullStr Study on thermal insulation and seismic effect for fault-crossing tunnel in high geothermal area
title_full_unstemmed Study on thermal insulation and seismic effect for fault-crossing tunnel in high geothermal area
title_short Study on thermal insulation and seismic effect for fault-crossing tunnel in high geothermal area
title_sort study on thermal insulation and seismic effect for fault-crossing tunnel in high geothermal area
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9256594/
https://www.ncbi.nlm.nih.gov/pubmed/35790872
http://dx.doi.org/10.1038/s41598-022-15626-4
work_keys_str_mv AT cuiguangyao studyonthermalinsulationandseismiceffectforfaultcrossingtunnelinhighgeothermalarea
AT shiwenhao studyonthermalinsulationandseismiceffectforfaultcrossingtunnelinhighgeothermalarea

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