Numerical Investigation of the Influence of Foundation Pit Excavation on the Deformation of Underlying Tunnels Based on a Multi-Factor Orthogonal Test
The excavation of pits will induce the vertical displacement of tunnels and lead to engineering problems. The shape as well as size of a pit, and the complex spatial position relationship between the pit and tunnel will induce different deformation responses of tunnel structures; however, the degree...
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MDPI AG
2024-08-01
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| author | Qingshan Wang Minmin Jiang Dakuo Feng Hailu Lu Mengcheng Yao Anlun Yang Meng Cao Zhongyang Ma |
| author_facet | Qingshan Wang Minmin Jiang Dakuo Feng Hailu Lu Mengcheng Yao Anlun Yang Meng Cao Zhongyang Ma |
| author_sort | Qingshan Wang |
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| description | The excavation of pits will induce the vertical displacement of tunnels and lead to engineering problems. The shape as well as size of a pit, and the complex spatial position relationship between the pit and tunnel will induce different deformation responses of tunnel structures; however, the degree to which each factor influences tunnel structure deformation is still unclear. This paper studied the impact of excavation on the deformation of tunnels via a combination of numerical simulation and orthogonal tests. The deformation of tunnels induced by excavation was studied using a numerical method, after which the sensitivity of influencing factors to tunnel deformation was studied by means of range and variance analyses through a four-factor and three-level orthogonal test. The results show that, for a foundation pit with a long side perpendicular to the tunnel longitude, the excavation has the least influence on tunnel deformation. Tunnel deformation increased with an increase in the excavation depth and decreased with an increase in tunnel–pit vertical and horizontal distance. As the plane shape of the foundation pit is 20 m × 45 m, the depth of excavation is 4 m, the pit tunnel vertical distance is 13 m, and the pit tunnel horizontal distance is 28 m, the tunnel has the least deformation. Based on the results of this study, the position relationship between the pit and the tunnel can be optimized in terms of design and construction, and the aim of controlling tunnel deformation can be achieved. |
| format | Article |
| id | doaj-art-6cde26ea3cdf433abd2b41d73e3c7e13 |
| institution | OA Journals |
| issn | 2075-5309 |
| language | English |
| publishDate | 2024-08-01 |
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| spelling | doaj-art-6cde26ea3cdf433abd2b41d73e3c7e132025-08-20T01:56:01ZengMDPI AGBuildings2075-53092024-08-01149261810.3390/buildings14092618Numerical Investigation of the Influence of Foundation Pit Excavation on the Deformation of Underlying Tunnels Based on a Multi-Factor Orthogonal TestQingshan Wang0Minmin Jiang1Dakuo Feng2Hailu Lu3Mengcheng Yao4Anlun Yang5Meng Cao6Zhongyang Ma7China Construction Seventh Engineering Division Corp., Ltd., Zhengzhou 450004, ChinaCollege of Civil Engineering, Henan University of Technology, Zhengzhou 450001, ChinaChina Construction Seventh Engineering Division Corp., Ltd., Zhengzhou 450004, ChinaChina Construction Seventh Engineering Division Corp., Ltd., Zhengzhou 450004, ChinaChina Construction Seventh Engineering Division Corp., Ltd., Zhengzhou 450004, ChinaChina Railway 16th Bureau Group, Corp., Ltd., Beijing 100018, ChinaCollege of Civil Engineering, Henan University of Technology, Zhengzhou 450001, ChinaCollege of Civil Engineering, Henan University of Technology, Zhengzhou 450001, ChinaThe excavation of pits will induce the vertical displacement of tunnels and lead to engineering problems. The shape as well as size of a pit, and the complex spatial position relationship between the pit and tunnel will induce different deformation responses of tunnel structures; however, the degree to which each factor influences tunnel structure deformation is still unclear. This paper studied the impact of excavation on the deformation of tunnels via a combination of numerical simulation and orthogonal tests. The deformation of tunnels induced by excavation was studied using a numerical method, after which the sensitivity of influencing factors to tunnel deformation was studied by means of range and variance analyses through a four-factor and three-level orthogonal test. The results show that, for a foundation pit with a long side perpendicular to the tunnel longitude, the excavation has the least influence on tunnel deformation. Tunnel deformation increased with an increase in the excavation depth and decreased with an increase in tunnel–pit vertical and horizontal distance. As the plane shape of the foundation pit is 20 m × 45 m, the depth of excavation is 4 m, the pit tunnel vertical distance is 13 m, and the pit tunnel horizontal distance is 28 m, the tunnel has the least deformation. Based on the results of this study, the position relationship between the pit and the tunnel can be optimized in terms of design and construction, and the aim of controlling tunnel deformation can be achieved.https://www.mdpi.com/2075-5309/14/9/2618tunnel deformationfoundation pit excavationnumerical simulationorthogonal test |
| spellingShingle | Qingshan Wang Minmin Jiang Dakuo Feng Hailu Lu Mengcheng Yao Anlun Yang Meng Cao Zhongyang Ma Numerical Investigation of the Influence of Foundation Pit Excavation on the Deformation of Underlying Tunnels Based on a Multi-Factor Orthogonal Test Buildings tunnel deformation foundation pit excavation numerical simulation orthogonal test |
| title | Numerical Investigation of the Influence of Foundation Pit Excavation on the Deformation of Underlying Tunnels Based on a Multi-Factor Orthogonal Test |
| title_full | Numerical Investigation of the Influence of Foundation Pit Excavation on the Deformation of Underlying Tunnels Based on a Multi-Factor Orthogonal Test |
| title_fullStr | Numerical Investigation of the Influence of Foundation Pit Excavation on the Deformation of Underlying Tunnels Based on a Multi-Factor Orthogonal Test |
| title_full_unstemmed | Numerical Investigation of the Influence of Foundation Pit Excavation on the Deformation of Underlying Tunnels Based on a Multi-Factor Orthogonal Test |
| title_short | Numerical Investigation of the Influence of Foundation Pit Excavation on the Deformation of Underlying Tunnels Based on a Multi-Factor Orthogonal Test |
| title_sort | numerical investigation of the influence of foundation pit excavation on the deformation of underlying tunnels based on a multi factor orthogonal test |
| topic | tunnel deformation foundation pit excavation numerical simulation orthogonal test |
| url | https://www.mdpi.com/2075-5309/14/9/2618 |
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