Longitudinal seismic responses of large diameter shield tunnel crossing liquefied bank slope
Abstract The lateral spread of the fluvial terraces due to liquefaction can cause tremendous physical damage to the underground structure. This paper designs a liquefaction slippage site and discusses the feasibility of the generalized response displacement method for investigating the seismic respo...
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Nature Portfolio
2025-04-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-95083-x |
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| author | Xiaoxiong Li Haiyang Zhuang Bin Ruan Kai Zhao Guoxing Chen |
| author_facet | Xiaoxiong Li Haiyang Zhuang Bin Ruan Kai Zhao Guoxing Chen |
| author_sort | Xiaoxiong Li |
| collection | DOAJ |
| description | Abstract The lateral spread of the fluvial terraces due to liquefaction can cause tremendous physical damage to the underground structure. This paper designs a liquefaction slippage site and discusses the feasibility of the generalized response displacement method for investigating the seismic response of shield tunnels in liquefaction slippage areas. According to the actual shield tunnel project across the lower reaches of the Yangtze River, a 4.8-km large-scale liquefaction site and a refined beam-spring shield tunnel model based on the generalized response displacement method are established, respectively. Further, the seismic response of the shield tunnel is evaluated. The numerical results show that for the focus area: (1) The generalized response displacement method can consider the influences of topographic effects and site liquefaction slippage on the longitudinal seismic response of the shield tunnel. (2) The site slippage of bank slope is harmful to the safety of the large-diameter tunnel structure, as it may cause a large longitudinal opening width at the ring intersegment as well as sudden changes in section tension and pressure. (3) The bending moment variation curve and the acceleration amplification factor curve along the tunnel axis are consistent with the site topography, and the curves show obvious abrupt changes in the liquefied slippage areas. |
| format | Article |
| id | doaj-art-09cdbd1bd6624de0975b04d1b94c882d |
| institution | DOAJ |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Nature Portfolio |
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| series | Scientific Reports |
| spelling | doaj-art-09cdbd1bd6624de0975b04d1b94c882d2025-08-20T03:18:42ZengNature PortfolioScientific Reports2045-23222025-04-0115111810.1038/s41598-025-95083-xLongitudinal seismic responses of large diameter shield tunnel crossing liquefied bank slopeXiaoxiong Li0Haiyang Zhuang1Bin Ruan2Kai Zhao3Guoxing Chen4Institute of Geotechnical Engineering, Nanjing Tech UniversityInstitute of Geotechnical Engineering, Nanjing Tech UniversityNational Center of Technology Innovation for Digital Construction, School of Civil and Hydraulic Engineering, Huazhong University of Science and TechnologyInstitute of Geotechnical Engineering, Nanjing Tech UniversityInstitute of Geotechnical Engineering, Nanjing Tech UniversityAbstract The lateral spread of the fluvial terraces due to liquefaction can cause tremendous physical damage to the underground structure. This paper designs a liquefaction slippage site and discusses the feasibility of the generalized response displacement method for investigating the seismic response of shield tunnels in liquefaction slippage areas. According to the actual shield tunnel project across the lower reaches of the Yangtze River, a 4.8-km large-scale liquefaction site and a refined beam-spring shield tunnel model based on the generalized response displacement method are established, respectively. Further, the seismic response of the shield tunnel is evaluated. The numerical results show that for the focus area: (1) The generalized response displacement method can consider the influences of topographic effects and site liquefaction slippage on the longitudinal seismic response of the shield tunnel. (2) The site slippage of bank slope is harmful to the safety of the large-diameter tunnel structure, as it may cause a large longitudinal opening width at the ring intersegment as well as sudden changes in section tension and pressure. (3) The bending moment variation curve and the acceleration amplification factor curve along the tunnel axis are consistent with the site topography, and the curves show obvious abrupt changes in the liquefied slippage areas.https://doi.org/10.1038/s41598-025-95083-xShield tunnelGeneralized response displacement methodLiquefied slippageOpening width at ring intersegmentSeismic response |
| spellingShingle | Xiaoxiong Li Haiyang Zhuang Bin Ruan Kai Zhao Guoxing Chen Longitudinal seismic responses of large diameter shield tunnel crossing liquefied bank slope Scientific Reports Shield tunnel Generalized response displacement method Liquefied slippage Opening width at ring intersegment Seismic response |
| title | Longitudinal seismic responses of large diameter shield tunnel crossing liquefied bank slope |
| title_full | Longitudinal seismic responses of large diameter shield tunnel crossing liquefied bank slope |
| title_fullStr | Longitudinal seismic responses of large diameter shield tunnel crossing liquefied bank slope |
| title_full_unstemmed | Longitudinal seismic responses of large diameter shield tunnel crossing liquefied bank slope |
| title_short | Longitudinal seismic responses of large diameter shield tunnel crossing liquefied bank slope |
| title_sort | longitudinal seismic responses of large diameter shield tunnel crossing liquefied bank slope |
| topic | Shield tunnel Generalized response displacement method Liquefied slippage Opening width at ring intersegment Seismic response |
| url | https://doi.org/10.1038/s41598-025-95083-x |
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