Numerical Simulation of Ultra-Shallow Buried Large-Span Double-Arch Tunnel Excavated under an Expressway
The temporal and spatial effects of a complicated excavation process are vital for an ultra-shallow buried large-span double-arch tunnel excavated under an expressway in service. Numerical simulations are urgent and necessary to understand the effect of the total construction process. Taking Xiamen...
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| Format: | Article |
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MDPI AG
2021-12-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/1/39 |
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| author | Jianxiu Wang Ansheng Cao Zhao Wu Zhipeng Sun Xiao Lin Lei Sun Xiaotian Liu Huboqiang Li Yuanwei Sun |
| author_facet | Jianxiu Wang Ansheng Cao Zhao Wu Zhipeng Sun Xiao Lin Lei Sun Xiaotian Liu Huboqiang Li Yuanwei Sun |
| author_sort | Jianxiu Wang |
| collection | DOAJ |
| description | The temporal and spatial effects of a complicated excavation process are vital for an ultra-shallow buried large-span double-arch tunnel excavated under an expressway in service. Numerical simulations are urgent and necessary to understand the effect of the total construction process. Taking Xiamen Haicang tunnel as a research object, the total excavation process of three pilot tunnels and the three-bench reserved core soil method of an ultra-shallow buried large-span double-arch tunnel with a fault fracture zone under an expressway was simulated using software FLAC<sup>3D</sup>. The deformation of the surface, surrounding rock, underground pipelines, tunnel support structure and partition wall of the three pilot tunnels and the main tunnel was analyzed, and the dangerous areas and time nodes were obtained. When the tunnel was excavated to the fault fracture zone, the deformation of the surface and surrounding rock increased significantly. The rock and soil within 20 m behind the excavation surface of the pilot tunnel were greatly disturbed by the excavation. During the excavation of the main tunnel, the horizontal displacement of the middle partition wall moved slightly towards the main tunnel excavated first. The research results can provide a reference for the construction design of double-arch tunnels. |
| first_indexed | 2024-03-10T03:51:22Z |
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| id | doaj.art-8745402359414d2e8653fd1f867f826c |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T03:51:22Z |
| publishDate | 2021-12-01 |
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| series | Applied Sciences |
| spelling | doaj.art-8745402359414d2e8653fd1f867f826c2023-11-23T11:06:40ZengMDPI AGApplied Sciences2076-34172021-12-011213910.3390/app12010039Numerical Simulation of Ultra-Shallow Buried Large-Span Double-Arch Tunnel Excavated under an ExpresswayJianxiu Wang0Ansheng Cao1Zhao Wu2Zhipeng Sun3Xiao Lin4Lei Sun5Xiaotian Liu6Huboqiang Li7Yuanwei Sun8College of Civil Engineering, Tongji University, Shanghai 200092, ChinaCollege of Civil Engineering, Tongji University, Shanghai 200092, ChinaCollege of Civil Engineering, Tongji University, Shanghai 200092, ChinaXiamen Road and Bridge Construction Group Company Ltd., Xiamen 361026, ChinaXiamen Road and Bridge Construction Group Company Ltd., Xiamen 361026, ChinaXiamen Road and Bridge Construction Group Company Ltd., Xiamen 361026, ChinaCollege of Civil Engineering, Tongji University, Shanghai 200092, ChinaCollege of Civil Engineering, Tongji University, Shanghai 200092, ChinaCollege of Civil Engineering, Tongji University, Shanghai 200092, ChinaThe temporal and spatial effects of a complicated excavation process are vital for an ultra-shallow buried large-span double-arch tunnel excavated under an expressway in service. Numerical simulations are urgent and necessary to understand the effect of the total construction process. Taking Xiamen Haicang tunnel as a research object, the total excavation process of three pilot tunnels and the three-bench reserved core soil method of an ultra-shallow buried large-span double-arch tunnel with a fault fracture zone under an expressway was simulated using software FLAC<sup>3D</sup>. The deformation of the surface, surrounding rock, underground pipelines, tunnel support structure and partition wall of the three pilot tunnels and the main tunnel was analyzed, and the dangerous areas and time nodes were obtained. When the tunnel was excavated to the fault fracture zone, the deformation of the surface and surrounding rock increased significantly. The rock and soil within 20 m behind the excavation surface of the pilot tunnel were greatly disturbed by the excavation. During the excavation of the main tunnel, the horizontal displacement of the middle partition wall moved slightly towards the main tunnel excavated first. The research results can provide a reference for the construction design of double-arch tunnels.https://www.mdpi.com/2076-3417/12/1/39ultra-shallow buried large-span double-arch tunnelthree pilot tunnels methodthree-bench reserved core soil methodtotal construction processdeformation analysisnumerical simulation |
| spellingShingle | Jianxiu Wang Ansheng Cao Zhao Wu Zhipeng Sun Xiao Lin Lei Sun Xiaotian Liu Huboqiang Li Yuanwei Sun Numerical Simulation of Ultra-Shallow Buried Large-Span Double-Arch Tunnel Excavated under an Expressway Applied Sciences ultra-shallow buried large-span double-arch tunnel three pilot tunnels method three-bench reserved core soil method total construction process deformation analysis numerical simulation |
| title | Numerical Simulation of Ultra-Shallow Buried Large-Span Double-Arch Tunnel Excavated under an Expressway |
| title_full | Numerical Simulation of Ultra-Shallow Buried Large-Span Double-Arch Tunnel Excavated under an Expressway |
| title_fullStr | Numerical Simulation of Ultra-Shallow Buried Large-Span Double-Arch Tunnel Excavated under an Expressway |
| title_full_unstemmed | Numerical Simulation of Ultra-Shallow Buried Large-Span Double-Arch Tunnel Excavated under an Expressway |
| title_short | Numerical Simulation of Ultra-Shallow Buried Large-Span Double-Arch Tunnel Excavated under an Expressway |
| title_sort | numerical simulation of ultra shallow buried large span double arch tunnel excavated under an expressway |
| topic | ultra-shallow buried large-span double-arch tunnel three pilot tunnels method three-bench reserved core soil method total construction process deformation analysis numerical simulation |
| url | https://www.mdpi.com/2076-3417/12/1/39 |
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