Inverse analysis of surrounding rock parameters of loess tunnels and numerical simulation analysis of stress-seepage coupling under water migration
Abstract In this study, the Tuanjie Tunnel project on the Tongwei-Dingxi Expressway is utilized to investigate the stress-seepage coupling in loess tunnels. Field monitoring, laboratory experiments, and numerical simulations were employed to establish a coupled numerical model of the stress-seepage...
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Nature Portfolio
2025-05-01
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| Online Access: | https://doi.org/10.1038/s41598-025-02602-x |
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| author | Jun-jie Xuan Ming Li Yao-hui Du Jia-qi Lin Yue Gao Yun-cheng Mao Kun Zhang |
| author_facet | Jun-jie Xuan Ming Li Yao-hui Du Jia-qi Lin Yue Gao Yun-cheng Mao Kun Zhang |
| author_sort | Jun-jie Xuan |
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| description | Abstract In this study, the Tuanjie Tunnel project on the Tongwei-Dingxi Expressway is utilized to investigate the stress-seepage coupling in loess tunnels. Field monitoring, laboratory experiments, and numerical simulations were employed to establish a coupled numerical model of the stress-seepage field for the shallow-buried sections of these tunnels. The seepage-stress interactions in loess tunnels were analyzed, revealing variations in pore water pressure around the tunnel and the deformation behavior of surrounding rock during construction, with particular attention to the effects of water migration.The results indicate that when the groundwater level is 10 m from the tunnel crown, the pressure of pore water at various measurement points follows an order of tunnel invert > arch springing > arch waist > arch haunch > tunnel crown. Within the pipe roof reinforcement zone, pore water pressure increases with distance from the tunnel perimeter, while above the zone, it decreases with distance. When considering water migration, the excavation of the upper bench significantly impacts the vertical effective stress at each point, the excavation of the middle bench impacts the arch wall and the haunch, and the excavation of the lower bench impacts the springing of the arch.Based on these insights, addressing the challenges encountered during the construction of water-rich loess tunnels, the implementation of pipe roof reinforcement measures for surrounding rock has played a positive role in enhancing the stability of loess tunnels during construction. |
| format | Article |
| id | doaj-art-db08d22acdb5404ca48706ee8b2368c1 |
| institution | OA Journals |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Nature Portfolio |
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| series | Scientific Reports |
| spelling | doaj-art-db08d22acdb5404ca48706ee8b2368c12025-08-20T02:34:17ZengNature PortfolioScientific Reports2045-23222025-05-0115111810.1038/s41598-025-02602-xInverse analysis of surrounding rock parameters of loess tunnels and numerical simulation analysis of stress-seepage coupling under water migrationJun-jie Xuan0Ming Li1Yao-hui Du2Jia-qi Lin3Yue Gao4Yun-cheng Mao5Kun Zhang6School of Civil Engineering, Northwest Minzu UniversitySchool of Civil Engineering, Northwest Minzu UniversitySchool of Civil Engineering, Lanzhou Jiaotong UniversitySchool of Civil Engineering, Northwest Minzu UniversitySchool of Civil Engineering, Lanzhou Jiaotong UniversitySchool of Civil Engineering, Northwest Minzu UniversitySchool of Civil Engineering, Northwest Minzu UniversityAbstract In this study, the Tuanjie Tunnel project on the Tongwei-Dingxi Expressway is utilized to investigate the stress-seepage coupling in loess tunnels. Field monitoring, laboratory experiments, and numerical simulations were employed to establish a coupled numerical model of the stress-seepage field for the shallow-buried sections of these tunnels. The seepage-stress interactions in loess tunnels were analyzed, revealing variations in pore water pressure around the tunnel and the deformation behavior of surrounding rock during construction, with particular attention to the effects of water migration.The results indicate that when the groundwater level is 10 m from the tunnel crown, the pressure of pore water at various measurement points follows an order of tunnel invert > arch springing > arch waist > arch haunch > tunnel crown. Within the pipe roof reinforcement zone, pore water pressure increases with distance from the tunnel perimeter, while above the zone, it decreases with distance. When considering water migration, the excavation of the upper bench significantly impacts the vertical effective stress at each point, the excavation of the middle bench impacts the arch wall and the haunch, and the excavation of the lower bench impacts the springing of the arch.Based on these insights, addressing the challenges encountered during the construction of water-rich loess tunnels, the implementation of pipe roof reinforcement measures for surrounding rock has played a positive role in enhancing the stability of loess tunnels during construction.https://doi.org/10.1038/s41598-025-02602-xWater-rich loess tunnelsStress-seepage couplingWater migrationPore water pressureNumerical simulation |
| spellingShingle | Jun-jie Xuan Ming Li Yao-hui Du Jia-qi Lin Yue Gao Yun-cheng Mao Kun Zhang Inverse analysis of surrounding rock parameters of loess tunnels and numerical simulation analysis of stress-seepage coupling under water migration Scientific Reports Water-rich loess tunnels Stress-seepage coupling Water migration Pore water pressure Numerical simulation |
| title | Inverse analysis of surrounding rock parameters of loess tunnels and numerical simulation analysis of stress-seepage coupling under water migration |
| title_full | Inverse analysis of surrounding rock parameters of loess tunnels and numerical simulation analysis of stress-seepage coupling under water migration |
| title_fullStr | Inverse analysis of surrounding rock parameters of loess tunnels and numerical simulation analysis of stress-seepage coupling under water migration |
| title_full_unstemmed | Inverse analysis of surrounding rock parameters of loess tunnels and numerical simulation analysis of stress-seepage coupling under water migration |
| title_short | Inverse analysis of surrounding rock parameters of loess tunnels and numerical simulation analysis of stress-seepage coupling under water migration |
| title_sort | inverse analysis of surrounding rock parameters of loess tunnels and numerical simulation analysis of stress seepage coupling under water migration |
| topic | Water-rich loess tunnels Stress-seepage coupling Water migration Pore water pressure Numerical simulation |
| url | https://doi.org/10.1038/s41598-025-02602-x |
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