A study on critical dislocation of gasket for segmental linings of shield tunnels
Abstract Dislocation of segments in shield tunnels significantly contributes to joint leakage, making it crucial to identify the critical dislocation amount of segment linings. To explore the waterproofing mechanism of sealing gaskets under water pressure, a structural coupling finite element analys...
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Nature Portfolio
2025-01-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-024-83882-7 |
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| author | Xuan Guo Zhitong Li Senyang Yuan |
| author_facet | Xuan Guo Zhitong Li Senyang Yuan |
| author_sort | Xuan Guo |
| collection | DOAJ |
| description | Abstract Dislocation of segments in shield tunnels significantly contributes to joint leakage, making it crucial to identify the critical dislocation amount of segment linings. To explore the waterproofing mechanism of sealing gaskets under water pressure, a structural coupling finite element analysis model was created. This model simulates water intrusion dynamics at segment joints, analyzing contact stress distribution and waterproof performance across various dislocation amounts. The comparison of finite element calculations with experimental data shows a positive correlation, although simulation results are slightly lower than experimental findings. The analysis demonstrates that lower effective contact stress due to dislocation increases leakage risk. In small deformation ranges, opposite segment constraints can enhance gasket contact, reducing leakage risks. However, exceeding critical dislocation leads to leakage. Findings indicate that as dislocation increases, the effective contact stress between the gasket and groove first decreases, then increases. A dislocation of 9 mm and an opening of 8 mm yield the lowest effective contact stress proportion and worst waterproof performance, marking a critical point for sealing water pressure changes. This study provides a scientific basis for determining critical dislocation amounts, optimizing joint sealing performance, and reducing leakage in shield tunnels. |
| format | Article |
| id | doaj-art-0820c5a9a6244a608315a4d75a4bd5eb |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-0820c5a9a6244a608315a4d75a4bd5eb2025-01-26T12:32:53ZengNature PortfolioScientific Reports2045-23222025-01-0115111810.1038/s41598-024-83882-7A study on critical dislocation of gasket for segmental linings of shield tunnelsXuan Guo0Zhitong Li1Senyang Yuan2Key Laboratory of Urban Underground Engineering of Ministry of Education, Beijing Jiaotong UniversityArchitecture Department, Shijiazhuang Institute of Railway TechnologySchool of Civil Engineering, Beijing Jiaotong UniversityAbstract Dislocation of segments in shield tunnels significantly contributes to joint leakage, making it crucial to identify the critical dislocation amount of segment linings. To explore the waterproofing mechanism of sealing gaskets under water pressure, a structural coupling finite element analysis model was created. This model simulates water intrusion dynamics at segment joints, analyzing contact stress distribution and waterproof performance across various dislocation amounts. The comparison of finite element calculations with experimental data shows a positive correlation, although simulation results are slightly lower than experimental findings. The analysis demonstrates that lower effective contact stress due to dislocation increases leakage risk. In small deformation ranges, opposite segment constraints can enhance gasket contact, reducing leakage risks. However, exceeding critical dislocation leads to leakage. Findings indicate that as dislocation increases, the effective contact stress between the gasket and groove first decreases, then increases. A dislocation of 9 mm and an opening of 8 mm yield the lowest effective contact stress proportion and worst waterproof performance, marking a critical point for sealing water pressure changes. This study provides a scientific basis for determining critical dislocation amounts, optimizing joint sealing performance, and reducing leakage in shield tunnels.https://doi.org/10.1038/s41598-024-83882-7Shield tunnelJoint waterproofingHyperelastic constitutive modelRatio of effective contact stressCritical displacement |
| spellingShingle | Xuan Guo Zhitong Li Senyang Yuan A study on critical dislocation of gasket for segmental linings of shield tunnels Scientific Reports Shield tunnel Joint waterproofing Hyperelastic constitutive model Ratio of effective contact stress Critical displacement |
| title | A study on critical dislocation of gasket for segmental linings of shield tunnels |
| title_full | A study on critical dislocation of gasket for segmental linings of shield tunnels |
| title_fullStr | A study on critical dislocation of gasket for segmental linings of shield tunnels |
| title_full_unstemmed | A study on critical dislocation of gasket for segmental linings of shield tunnels |
| title_short | A study on critical dislocation of gasket for segmental linings of shield tunnels |
| title_sort | study on critical dislocation of gasket for segmental linings of shield tunnels |
| topic | Shield tunnel Joint waterproofing Hyperelastic constitutive model Ratio of effective contact stress Critical displacement |
| url | https://doi.org/10.1038/s41598-024-83882-7 |
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