Analyses of the Ground Surface Displacement under Reinforcement Construction in the Shield Tunnel End Using the Artificial Ground Freezing Method
There are stringent requirements on the vertical movement of a ground surface when using artificial ground freezing method to reinforce a shield tunnel in a city. This paper focused on the tunnel of Nanjing Metro Line Two between Yixianqiao and Daxinggong. Based on the discrete element thermo-mechan...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-07-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/14/8508 |
| _version_ | 1797590357550039040 |
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| author | Hui Xiang Guoce Zhang Po Cheng Jun Hu Zhixin Wang Dongling Zeng |
| author_facet | Hui Xiang Guoce Zhang Po Cheng Jun Hu Zhixin Wang Dongling Zeng |
| author_sort | Hui Xiang |
| collection | DOAJ |
| description | There are stringent requirements on the vertical movement of a ground surface when using artificial ground freezing method to reinforce a shield tunnel in a city. This paper focused on the tunnel of Nanjing Metro Line Two between Yixianqiao and Daxinggong. Based on the discrete element thermo-mechanical coupling theory, the horizontal freezing reinforcement project was numerically simulated. The numerical results of the soil temperature field and displacement field are approximately compatible with the field measurements. When the tunnel was frozen for 40 days, an effectively frozen soil wall was created and satisfied the construction requirements. During the freezing construction, both frost heave and thaw settlement obviously occurred. Above the tunnel, the vertical deformation of the ground surface was symmetrical about the center of the tunnel and decayed towards the ends. The maximum vertical displacement of ground surface frost heave was 8 mm, and the maximum vertical displacement of ground surface thaw settlement was 18 mm. Increasing the depth of the tunnel embedment can result in a decline in ground surface displacement. The study serves as a viable means of predicting ground surface displacements. |
| first_indexed | 2024-03-11T01:19:20Z |
| format | Article |
| id | doaj.art-2e4a9e2217ce4440867a6c38a19b7135 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T01:19:20Z |
| publishDate | 2023-07-01 |
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| series | Applied Sciences |
| spelling | doaj.art-2e4a9e2217ce4440867a6c38a19b71352023-11-18T18:14:03ZengMDPI AGApplied Sciences2076-34172023-07-011314850810.3390/app13148508Analyses of the Ground Surface Displacement under Reinforcement Construction in the Shield Tunnel End Using the Artificial Ground Freezing MethodHui Xiang0Guoce Zhang1Po Cheng2Jun Hu3Zhixin Wang4Dongling Zeng5School of Civil Engineering and Architecture, Hainan University, Haikou 570228, ChinaSchool of Civil Engineering and Architecture, Hainan University, Haikou 570228, ChinaState Key Laboratory of Water Resources Engineering and Management, Wuhan University, Wuhan 430072, ChinaSchool of Civil Engineering and Architecture, Hainan University, Haikou 570228, ChinaHainan Hydrogeology and Engineering Geology Survey Institute, Haikou 570206, ChinaHainan Hydrogeology and Engineering Geology Survey Institute, Haikou 570206, ChinaThere are stringent requirements on the vertical movement of a ground surface when using artificial ground freezing method to reinforce a shield tunnel in a city. This paper focused on the tunnel of Nanjing Metro Line Two between Yixianqiao and Daxinggong. Based on the discrete element thermo-mechanical coupling theory, the horizontal freezing reinforcement project was numerically simulated. The numerical results of the soil temperature field and displacement field are approximately compatible with the field measurements. When the tunnel was frozen for 40 days, an effectively frozen soil wall was created and satisfied the construction requirements. During the freezing construction, both frost heave and thaw settlement obviously occurred. Above the tunnel, the vertical deformation of the ground surface was symmetrical about the center of the tunnel and decayed towards the ends. The maximum vertical displacement of ground surface frost heave was 8 mm, and the maximum vertical displacement of ground surface thaw settlement was 18 mm. Increasing the depth of the tunnel embedment can result in a decline in ground surface displacement. The study serves as a viable means of predicting ground surface displacements.https://www.mdpi.com/2076-3417/13/14/8508artificial ground freezing methodfrost heavethaw settlementdiscrete element methodnumerical simulation |
| spellingShingle | Hui Xiang Guoce Zhang Po Cheng Jun Hu Zhixin Wang Dongling Zeng Analyses of the Ground Surface Displacement under Reinforcement Construction in the Shield Tunnel End Using the Artificial Ground Freezing Method Applied Sciences artificial ground freezing method frost heave thaw settlement discrete element method numerical simulation |
| title | Analyses of the Ground Surface Displacement under Reinforcement Construction in the Shield Tunnel End Using the Artificial Ground Freezing Method |
| title_full | Analyses of the Ground Surface Displacement under Reinforcement Construction in the Shield Tunnel End Using the Artificial Ground Freezing Method |
| title_fullStr | Analyses of the Ground Surface Displacement under Reinforcement Construction in the Shield Tunnel End Using the Artificial Ground Freezing Method |
| title_full_unstemmed | Analyses of the Ground Surface Displacement under Reinforcement Construction in the Shield Tunnel End Using the Artificial Ground Freezing Method |
| title_short | Analyses of the Ground Surface Displacement under Reinforcement Construction in the Shield Tunnel End Using the Artificial Ground Freezing Method |
| title_sort | analyses of the ground surface displacement under reinforcement construction in the shield tunnel end using the artificial ground freezing method |
| topic | artificial ground freezing method frost heave thaw settlement discrete element method numerical simulation |
| url | https://www.mdpi.com/2076-3417/13/14/8508 |
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