Comparison of Dynamic Characteristics between Small and Super-Large Diameter Cross-River Twin Tunnels under Train Vibration
Train vibration from closely aligned adjacent tunnels could cause safety concerns, especially given the soaring size of the tunnel diameter. This paper established a two-dimensional discrete element model (DEM) of small (<i>d</i> = 6.2 m) and super-large (<i>D</i> = 15.2 m) d...
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MDPI AG
2021-08-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/16/7577 |
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| author | Lin Wu Xiedong Zhang Wei Wang Xiancong Meng Hong Guo |
| author_facet | Lin Wu Xiedong Zhang Wei Wang Xiancong Meng Hong Guo |
| author_sort | Lin Wu |
| collection | DOAJ |
| description | Train vibration from closely aligned adjacent tunnels could cause safety concerns, especially given the soaring size of the tunnel diameter. This paper established a two-dimensional discrete element model (DEM) of small (<i>d</i> = 6.2 m) and super-large (<i>D</i> = 15.2 m) diameter cross-river twin tunnels and discussed the dynamic characteristics of adjacent tunnels during the vibration of a train that runs through the tunnel at a speed of 120 km/h. Results in the <i>D</i> tunnel showed that the horizontal walls have the same horizontal displacement (<i>D</i><sub>H</sub>) and the vertical walls have the same vertical displacement (<i>D</i><sub>V</sub>). The stress state of the surroundings of the <i>D</i> tunnel is the decisive factor for <i>D</i><sub>H</sub>, and the distance from the vibration point to the measurement point is the decisive factor for <i>D</i><sub>V</sub>. Results in the comparison of the <i>d</i> and <i>D</i> tunnels showed that the <i>D</i> tunnel is more stable than the <i>d</i> tunnel with respect to two aspects: the time the tunnel reaches the equilibrium state and the vibration amplitude of the structure’s dynamic and static responses. The dynamic characteristic of the <i>d</i> and <i>D</i> tunnel is significantly different. This research is expected to guide the design and construction of large diameter twin tunnels. |
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| id | doaj.art-8c0bb608f300495aba3e2a60cc3845a5 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T09:01:30Z |
| publishDate | 2021-08-01 |
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| spelling | doaj.art-8c0bb608f300495aba3e2a60cc3845a52023-11-22T06:43:43ZengMDPI AGApplied Sciences2076-34172021-08-011116757710.3390/app11167577Comparison of Dynamic Characteristics between Small and Super-Large Diameter Cross-River Twin Tunnels under Train VibrationLin Wu0Xiedong Zhang1Wei Wang2Xiancong Meng3Hong Guo4School of Transportation and Logistics Engineering, Wuhan University of Technology, Wuhan 430063, ChinaSchool of Transportation and Logistics Engineering, Wuhan University of Technology, Wuhan 430063, ChinaSchool of Transportation and Logistics Engineering, Wuhan University of Technology, Wuhan 430063, ChinaSchool of Transportation and Logistics Engineering, Wuhan University of Technology, Wuhan 430063, ChinaSchool of Civil Engineering and Architecture, Shaanxi University of Technology, Hanzhong 723001, ChinaTrain vibration from closely aligned adjacent tunnels could cause safety concerns, especially given the soaring size of the tunnel diameter. This paper established a two-dimensional discrete element model (DEM) of small (<i>d</i> = 6.2 m) and super-large (<i>D</i> = 15.2 m) diameter cross-river twin tunnels and discussed the dynamic characteristics of adjacent tunnels during the vibration of a train that runs through the tunnel at a speed of 120 km/h. Results in the <i>D</i> tunnel showed that the horizontal walls have the same horizontal displacement (<i>D</i><sub>H</sub>) and the vertical walls have the same vertical displacement (<i>D</i><sub>V</sub>). The stress state of the surroundings of the <i>D</i> tunnel is the decisive factor for <i>D</i><sub>H</sub>, and the distance from the vibration point to the measurement point is the decisive factor for <i>D</i><sub>V</sub>. Results in the comparison of the <i>d</i> and <i>D</i> tunnels showed that the <i>D</i> tunnel is more stable than the <i>d</i> tunnel with respect to two aspects: the time the tunnel reaches the equilibrium state and the vibration amplitude of the structure’s dynamic and static responses. The dynamic characteristic of the <i>d</i> and <i>D</i> tunnel is significantly different. This research is expected to guide the design and construction of large diameter twin tunnels.https://www.mdpi.com/2076-3417/11/16/7577twin tunnelssuper-large diameter tunneltrain vibration loaddynamic characteristicsdiscrete element method (DEM) |
| spellingShingle | Lin Wu Xiedong Zhang Wei Wang Xiancong Meng Hong Guo Comparison of Dynamic Characteristics between Small and Super-Large Diameter Cross-River Twin Tunnels under Train Vibration Applied Sciences twin tunnels super-large diameter tunnel train vibration load dynamic characteristics discrete element method (DEM) |
| title | Comparison of Dynamic Characteristics between Small and Super-Large Diameter Cross-River Twin Tunnels under Train Vibration |
| title_full | Comparison of Dynamic Characteristics between Small and Super-Large Diameter Cross-River Twin Tunnels under Train Vibration |
| title_fullStr | Comparison of Dynamic Characteristics between Small and Super-Large Diameter Cross-River Twin Tunnels under Train Vibration |
| title_full_unstemmed | Comparison of Dynamic Characteristics between Small and Super-Large Diameter Cross-River Twin Tunnels under Train Vibration |
| title_short | Comparison of Dynamic Characteristics between Small and Super-Large Diameter Cross-River Twin Tunnels under Train Vibration |
| title_sort | comparison of dynamic characteristics between small and super large diameter cross river twin tunnels under train vibration |
| topic | twin tunnels super-large diameter tunnel train vibration load dynamic characteristics discrete element method (DEM) |
| url | https://www.mdpi.com/2076-3417/11/16/7577 |
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