Analysis of temperature field evolution in ground freezing construction of twin tunnels in a coastal urban area
Abstract In the field of underground engineering, the artificial ground freezing method has emerged as a highly effective technique due to its excellent impermeability, controllability, and minimal environmental impact. This method is particularly advantageous in complex geological and urban setting...
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Nature Portfolio
2025-08-01
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| Online Access: | https://doi.org/10.1038/s41598-025-14000-4 |
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| author | Tingfen Ye Jun Hu Jie Zhou Huajing Gan Lei Huang Xinmin Shang |
| author_facet | Tingfen Ye Jun Hu Jie Zhou Huajing Gan Lei Huang Xinmin Shang |
| author_sort | Tingfen Ye |
| collection | DOAJ |
| description | Abstract In the field of underground engineering, the artificial ground freezing method has emerged as a highly effective technique due to its excellent impermeability, controllability, and minimal environmental impact. This method is particularly advantageous in complex geological and urban settings, making it widely used in tunnel construction under challenging conditions. However, in the case of twin-tunnel (or two-lane tunnel) projects, accurately predicting the temperature field during the freezing process remains a critical challenge. One of the key issues lies in the uncertainty of excavation rates, which significantly affects the development and control of the frozen wall. This paper establishes a three-dimensional water-heat coupling model based on the actual project of an underground two-lane tunnel in a city near the sea. Through numerical simulations, the model analyzes and investigates the temperature field maps, effective permafrost curtain thickness, and the cooling law of the two primary surface paths. The findings indicate that the development of effective permafrost curtain thickness is significantly influenced by seepage. The upstream side of the left tunnel experiences the greatest impact at 45°, 90°, and 135°, with the downstream side of the right tunnel showing less influence in five directions. The development trend of effective permafrost curtain thickness in the 90° direction of the left tunnel is opposite to that of the right tunnel, with a difference of 1.7393 m, both reaching the design standard thickness. Over time, the freezing tubes continue to produce cold, causing the temperatures in the freezing zones to decrease. The temperature of the main face 1 exhibits a ‘double W’ shape distribution in the temporal-spatial change, while the temperature of the main face 2 shows a ‘W’ shape distribution in the same context. |
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| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-08-01 |
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| spelling | doaj-art-2b183b269f4e47d3a928a16dea0f7ab62025-08-20T03:46:05ZengNature PortfolioScientific Reports2045-23222025-08-0115111710.1038/s41598-025-14000-4Analysis of temperature field evolution in ground freezing construction of twin tunnels in a coastal urban areaTingfen Ye0Jun Hu1Jie Zhou2Huajing Gan3Lei Huang4Xinmin Shang5School of Civil Engineering and Architecture, Hainan UniversitySchool of Civil Engineering and Architecture, Hainan UniversityDepartment of Underground Architectural Engineering, College of Civil Engineering and Architectural Engineering, Tongji UniversitySchool of Civil Engineering and Architecture, Hainan UniversityShandong Jiayu Engineering Construction Co., LtdJunchi Engineering Co., LtdAbstract In the field of underground engineering, the artificial ground freezing method has emerged as a highly effective technique due to its excellent impermeability, controllability, and minimal environmental impact. This method is particularly advantageous in complex geological and urban settings, making it widely used in tunnel construction under challenging conditions. However, in the case of twin-tunnel (or two-lane tunnel) projects, accurately predicting the temperature field during the freezing process remains a critical challenge. One of the key issues lies in the uncertainty of excavation rates, which significantly affects the development and control of the frozen wall. This paper establishes a three-dimensional water-heat coupling model based on the actual project of an underground two-lane tunnel in a city near the sea. Through numerical simulations, the model analyzes and investigates the temperature field maps, effective permafrost curtain thickness, and the cooling law of the two primary surface paths. The findings indicate that the development of effective permafrost curtain thickness is significantly influenced by seepage. The upstream side of the left tunnel experiences the greatest impact at 45°, 90°, and 135°, with the downstream side of the right tunnel showing less influence in five directions. The development trend of effective permafrost curtain thickness in the 90° direction of the left tunnel is opposite to that of the right tunnel, with a difference of 1.7393 m, both reaching the design standard thickness. Over time, the freezing tubes continue to produce cold, causing the temperatures in the freezing zones to decrease. The temperature of the main face 1 exhibits a ‘double W’ shape distribution in the temporal-spatial change, while the temperature of the main face 2 shows a ‘W’ shape distribution in the same context.https://doi.org/10.1038/s41598-025-14000-4Two-lane tunnelFreezing temperature fieldEffective thicknessPermafrost curtain |
| spellingShingle | Tingfen Ye Jun Hu Jie Zhou Huajing Gan Lei Huang Xinmin Shang Analysis of temperature field evolution in ground freezing construction of twin tunnels in a coastal urban area Scientific Reports Two-lane tunnel Freezing temperature field Effective thickness Permafrost curtain |
| title | Analysis of temperature field evolution in ground freezing construction of twin tunnels in a coastal urban area |
| title_full | Analysis of temperature field evolution in ground freezing construction of twin tunnels in a coastal urban area |
| title_fullStr | Analysis of temperature field evolution in ground freezing construction of twin tunnels in a coastal urban area |
| title_full_unstemmed | Analysis of temperature field evolution in ground freezing construction of twin tunnels in a coastal urban area |
| title_short | Analysis of temperature field evolution in ground freezing construction of twin tunnels in a coastal urban area |
| title_sort | analysis of temperature field evolution in ground freezing construction of twin tunnels in a coastal urban area |
| topic | Two-lane tunnel Freezing temperature field Effective thickness Permafrost curtain |
| url | https://doi.org/10.1038/s41598-025-14000-4 |
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