Construction Mechanical Response Analysis of City Railway Machinary Method Link Passage under Eccentric Opening Conditions
[Objective] The machinery construction method for link passages has been widely applied in 6-meter-class diameter shield tunnels, typically used in metro projects. However, there are few engineering practice cases and the limited research regarding its application in city railway tunnels, where 9-me...
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Urban Mass Transit Magazine Press
2025-07-01
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| Series: | Chengshi guidao jiaotong yanjiu |
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| Online Access: | https://umt1998.tongji.edu.cn/journal/paper/doi/10.16037/j.1007-869x.20245933.html |
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| author | LI Yitao SUN Shuangchi YU Jing ZHOU Meng WANG Wenzhong |
| author_facet | LI Yitao SUN Shuangchi YU Jing ZHOU Meng WANG Wenzhong |
| author_sort | LI Yitao |
| collection | DOAJ |
| description | [Objective] The machinery construction method for link passages has been widely applied in 6-meter-class diameter shield tunnels, typically used in metro projects. However, there are few engineering practice cases and the limited research regarding its application in city railway tunnels, where 9-meter-class large-diameter shields are used. [Method] Focusing on a city railway project with 9-meter-class diameter shield tunnel, a three-dimensional load structure model of main tunnel and link passage is established. Under varying conditions of burial depth, soil parameter, and shield machine thrust, the impact of link passage construction on the main tunnel structure is analyzed from three aspects: deformation, axial force, and bending moment of special segments under different operating conditions. [Result & Conclusion] The additional deformation caused by the construction of link passage is influenced by both the burial depth and the thrust of the shield machine. When the burial depth is large, the link passage construction will increase the convergence deformation of the main tunnel; when the burial depth is small, it reduces the convergence deformation. An increase in shield machine thrust further reduces the convergence deformation of the main tunnel. Changes in the main tunnel internal forces are mainly concentrated in the steel segment sections of the three-ring special segments, where the axial force and bending moment at the arch waist of semi-open segment significantly increase, with the maximum occurring under operational conditions, which requires special attention during design. In contrast, internal force changes in the concrete segments are relatively minor. |
| format | Article |
| id | doaj-art-15c98c4b160e409b86e9e933ecd081c7 |
| institution | Kabale University |
| issn | 1007-869X |
| language | zho |
| publishDate | 2025-07-01 |
| publisher | Urban Mass Transit Magazine Press |
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| series | Chengshi guidao jiaotong yanjiu |
| spelling | doaj-art-15c98c4b160e409b86e9e933ecd081c72025-08-20T03:50:26ZzhoUrban Mass Transit Magazine PressChengshi guidao jiaotong yanjiu1007-869X2025-07-0128711612310.16037/j.1007-869x.20245933Construction Mechanical Response Analysis of City Railway Machinary Method Link Passage under Eccentric Opening ConditionsLI Yitao0SUN Shuangchi1YU Jing2ZHOU Meng3WANG Wenzhong4China Railway Shanghai Design Institute Group Co., Ltd., 200070, Shanghai, ChinaShanghai Shen-Tie Investment Co., Ltd., 200030, Shanghai, ChinaShanghai Shen-Tie Investment Co., Ltd., 200030, Shanghai, ChinaChina Railway Shanghai Design Institute Group Co., Ltd., 200070, Shanghai, ChinaChina Railway Shanghai Design Institute Group Co., Ltd., 200070, Shanghai, China[Objective] The machinery construction method for link passages has been widely applied in 6-meter-class diameter shield tunnels, typically used in metro projects. However, there are few engineering practice cases and the limited research regarding its application in city railway tunnels, where 9-meter-class large-diameter shields are used. [Method] Focusing on a city railway project with 9-meter-class diameter shield tunnel, a three-dimensional load structure model of main tunnel and link passage is established. Under varying conditions of burial depth, soil parameter, and shield machine thrust, the impact of link passage construction on the main tunnel structure is analyzed from three aspects: deformation, axial force, and bending moment of special segments under different operating conditions. [Result & Conclusion] The additional deformation caused by the construction of link passage is influenced by both the burial depth and the thrust of the shield machine. When the burial depth is large, the link passage construction will increase the convergence deformation of the main tunnel; when the burial depth is small, it reduces the convergence deformation. An increase in shield machine thrust further reduces the convergence deformation of the main tunnel. Changes in the main tunnel internal forces are mainly concentrated in the steel segment sections of the three-ring special segments, where the axial force and bending moment at the arch waist of semi-open segment significantly increase, with the maximum occurring under operational conditions, which requires special attention during design. In contrast, internal force changes in the concrete segments are relatively minor.https://umt1998.tongji.edu.cn/journal/paper/doi/10.16037/j.1007-869x.20245933.htmlcity railwayshield tunnel constructionmachinery construction method link passageeccentric openingnumerical simulation |
| spellingShingle | LI Yitao SUN Shuangchi YU Jing ZHOU Meng WANG Wenzhong Construction Mechanical Response Analysis of City Railway Machinary Method Link Passage under Eccentric Opening Conditions Chengshi guidao jiaotong yanjiu city railway shield tunnel construction machinery construction method link passage eccentric opening numerical simulation |
| title | Construction Mechanical Response Analysis of City Railway Machinary Method Link Passage under Eccentric Opening Conditions |
| title_full | Construction Mechanical Response Analysis of City Railway Machinary Method Link Passage under Eccentric Opening Conditions |
| title_fullStr | Construction Mechanical Response Analysis of City Railway Machinary Method Link Passage under Eccentric Opening Conditions |
| title_full_unstemmed | Construction Mechanical Response Analysis of City Railway Machinary Method Link Passage under Eccentric Opening Conditions |
| title_short | Construction Mechanical Response Analysis of City Railway Machinary Method Link Passage under Eccentric Opening Conditions |
| title_sort | construction mechanical response analysis of city railway machinary method link passage under eccentric opening conditions |
| topic | city railway shield tunnel construction machinery construction method link passage eccentric opening numerical simulation |
| url | https://umt1998.tongji.edu.cn/journal/paper/doi/10.16037/j.1007-869x.20245933.html |
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