Optimization of heavy haul railway tunnel lining based on ultimate bearing capacity
The optimization process of design parameters for composite lining of heavy haul railway tunnel is a key problem to be solved in tunnel engineering design. In order to put forward a better design scheme of composite lining for heavy haul railway tunnel, combined with field measurement and numerical...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Polish Academy of Sciences
2022-12-01
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| Series: | Archives of Civil Engineering |
| Subjects: | |
| Online Access: | https://journals.pan.pl/Content/125691/PDF/art29_int.pdf |
| _version_ | 1797954350943830016 |
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| author | Wei Han Taoli Xiao Duanwen Shi Yupeng Wang |
| author_facet | Wei Han Taoli Xiao Duanwen Shi Yupeng Wang |
| author_sort | Wei Han |
| collection | DOAJ |
| description | The optimization process of design parameters for composite lining of heavy haul railway tunnel is a key problem to be solved in tunnel engineering design. In order to put forward a better design scheme of composite lining for heavy haul railway tunnel, combined with field measurement and numerical simulation, the optimal working condition design is carried out by changing the thickness of shotcrete layer, the type of grid steel frame and the thickness of secondary lining. The influence of the above design parameters on the stress state of the composite lining is analyzed to obtain the optimal design parameters. Finally, the safety performance of the optimized lining is evaluated by the ultimate bearing capacity curve of the secondary lining section. The research shows that: 1) The optimal design parameters of the composite lining of the tunnel are the thickness of the shotcrete layer of 25 cm, the type of the grid steel frame of H180, the thickness of the secondary lining arch waist and the side wall of 40 cm and 35 cm respectively; 2) Different from the single-track heavy haul railway tunnel, the displacement value of the vault settlement of the double-track heavy haul railway tunnel is significantly greater than that of the inner convergence. Increasing the thickness of the shotcrete layer and changing the type of the grid steel frame have better effects on reducing the vault settlement, and have little effect on the inner convergence. |
| first_indexed | 2024-04-10T23:17:16Z |
| format | Article |
| id | doaj.art-0a0a11129ad543c5be5b7656d3a37746 |
| institution | Directory Open Access Journal |
| issn | 1230-2945 |
| language | English |
| last_indexed | 2024-04-10T23:17:16Z |
| publishDate | 2022-12-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Civil Engineering |
| spelling | doaj.art-0a0a11129ad543c5be5b7656d3a377462023-01-12T18:06:08ZengPolish Academy of SciencesArchives of Civil Engineering1230-29452022-12-01vol. 68No 4493511https://doi.org/10.24425/ace.2022.143051Optimization of heavy haul railway tunnel lining based on ultimate bearing capacityWei Han0https://orcid.org/0000-0002-2944-8525Taoli Xiao1https://orcid.org/0000-0001-6796-8268Duanwen Shi2https://orcid.org/0000-0002-3874-1838Yupeng Wang3https://orcid.org/0000-0002-4859-1386Fujian Forestry Vocational and Technical College, Department of Traffic Engineering, Nanping, 353000, ChinaYangtze University, School of Urban Construction, Jingzhou, 434000, ChinaChina Railway Fourth Survey and Design Institute Group Co., Ltd, Tunnel Engineering, Wuhan,430000, ChinaFujian Forestry Vocational and Technical College, Department of Traffic Engineering, Nanping, 353000, ChinaThe optimization process of design parameters for composite lining of heavy haul railway tunnel is a key problem to be solved in tunnel engineering design. In order to put forward a better design scheme of composite lining for heavy haul railway tunnel, combined with field measurement and numerical simulation, the optimal working condition design is carried out by changing the thickness of shotcrete layer, the type of grid steel frame and the thickness of secondary lining. The influence of the above design parameters on the stress state of the composite lining is analyzed to obtain the optimal design parameters. Finally, the safety performance of the optimized lining is evaluated by the ultimate bearing capacity curve of the secondary lining section. The research shows that: 1) The optimal design parameters of the composite lining of the tunnel are the thickness of the shotcrete layer of 25 cm, the type of the grid steel frame of H180, the thickness of the secondary lining arch waist and the side wall of 40 cm and 35 cm respectively; 2) Different from the single-track heavy haul railway tunnel, the displacement value of the vault settlement of the double-track heavy haul railway tunnel is significantly greater than that of the inner convergence. Increasing the thickness of the shotcrete layer and changing the type of the grid steel frame have better effects on reducing the vault settlement, and have little effect on the inner convergence.https://journals.pan.pl/Content/125691/PDF/art29_int.pdfsafety factor of bending resistancesafety of lining structuretunnel engineeringlining optimizationultimate bearing capacity |
| spellingShingle | Wei Han Taoli Xiao Duanwen Shi Yupeng Wang Optimization of heavy haul railway tunnel lining based on ultimate bearing capacity Archives of Civil Engineering safety factor of bending resistance safety of lining structure tunnel engineering lining optimization ultimate bearing capacity |
| title | Optimization of heavy haul railway tunnel lining based on ultimate bearing capacity |
| title_full | Optimization of heavy haul railway tunnel lining based on ultimate bearing capacity |
| title_fullStr | Optimization of heavy haul railway tunnel lining based on ultimate bearing capacity |
| title_full_unstemmed | Optimization of heavy haul railway tunnel lining based on ultimate bearing capacity |
| title_short | Optimization of heavy haul railway tunnel lining based on ultimate bearing capacity |
| title_sort | optimization of heavy haul railway tunnel lining based on ultimate bearing capacity |
| topic | safety factor of bending resistance safety of lining structure tunnel engineering lining optimization ultimate bearing capacity |
| url | https://journals.pan.pl/Content/125691/PDF/art29_int.pdf |
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