Research on the combined control of tunnel deformation adjacent to the foundation pit by servo steel strut and capsule grouting
Abstract To address the issue of controlling the deformation of adjacent tunnels after excavation of the foundation pit, a method combining servo steel strut and capsule grouting for controlling the deformation of adjacent tunnels is proposed. First, the scaled model tests were conducted to determin...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-07-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-07678-z |
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| author | Gang Wei Weihao Feng Xuehua Wu Pengfei Wu Hang Li Zhenyi Zhu Zhe Wang |
| author_facet | Gang Wei Weihao Feng Xuehua Wu Pengfei Wu Hang Li Zhenyi Zhu Zhe Wang |
| author_sort | Gang Wei |
| collection | DOAJ |
| description | Abstract To address the issue of controlling the deformation of adjacent tunnels after excavation of the foundation pit, a method combining servo steel strut and capsule grouting for controlling the deformation of adjacent tunnels is proposed. First, the scaled model tests were conducted to determine the influence of the number of servo loading and their arrangement on the stress and deformation of the tunnel and diaphragm wall under the same capsule grouting conditions. This led to the identification of the optimal servo loading mode. Subsequently, numerical simulations were performed to analyze the effects of different double-row capsule grouting spacings on the tunnel and diaphragm wall under the optimal servo loading mode. The research results indicate that in the model tests, both servo loading and capsule grouting reduce the horizontal deformation and horizontal convergence of the tunnel but increase the tunnel settlement and pressure at the right hance. The greater the number of servo loading struts, the more effective the control of deformation in the diaphragm wall and tunnel. When the number of servo steel strut is constant, the closer the burial depth of the servo loading arrangement is to the burial depth of the tunnel axis, the greater the deformation of the tunnel. In the numerical simulations, the change in the horizontal spacing of the double-row capsule grouting has a greater impact on the deformation of the diaphragm wall and the right hance of the tunnel than changes in the tunnel clearance. The smaller the horizontal spacing, the greater the deformation of the diaphragm wall and the right hance of the tunnel. |
| format | Article |
| id | doaj-art-2b45a1dd3ca64e87b5b12e67f1d4c899 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-2b45a1dd3ca64e87b5b12e67f1d4c8992025-08-20T04:01:26ZengNature PortfolioScientific Reports2045-23222025-07-0115111910.1038/s41598-025-07678-zResearch on the combined control of tunnel deformation adjacent to the foundation pit by servo steel strut and capsule groutingGang Wei0Weihao Feng1Xuehua Wu2Pengfei Wu3Hang Li4Zhenyi Zhu5Zhe Wang6Department of Civil Engineering, Hangzhou City UniversityCollege of Civil Engineering, Zhejiang College of ConstructionDepartment of Civil Engineering, Zhejiang University of TechnologyDepartment of Civil Engineering, Zhejiang University of TechnologyCollege of Civil Engineering and Architecture, Zhejiang UniversityDepartment of Civil Engineering, Zhejiang University of TechnologyDepartment of Civil Engineering, Zhejiang University of TechnologyAbstract To address the issue of controlling the deformation of adjacent tunnels after excavation of the foundation pit, a method combining servo steel strut and capsule grouting for controlling the deformation of adjacent tunnels is proposed. First, the scaled model tests were conducted to determine the influence of the number of servo loading and their arrangement on the stress and deformation of the tunnel and diaphragm wall under the same capsule grouting conditions. This led to the identification of the optimal servo loading mode. Subsequently, numerical simulations were performed to analyze the effects of different double-row capsule grouting spacings on the tunnel and diaphragm wall under the optimal servo loading mode. The research results indicate that in the model tests, both servo loading and capsule grouting reduce the horizontal deformation and horizontal convergence of the tunnel but increase the tunnel settlement and pressure at the right hance. The greater the number of servo loading struts, the more effective the control of deformation in the diaphragm wall and tunnel. When the number of servo steel strut is constant, the closer the burial depth of the servo loading arrangement is to the burial depth of the tunnel axis, the greater the deformation of the tunnel. In the numerical simulations, the change in the horizontal spacing of the double-row capsule grouting has a greater impact on the deformation of the diaphragm wall and the right hance of the tunnel than changes in the tunnel clearance. The smaller the horizontal spacing, the greater the deformation of the diaphragm wall and the right hance of the tunnel.https://doi.org/10.1038/s41598-025-07678-zShield tunnelServo steel strutCapsule groutingActive controlModel test |
| spellingShingle | Gang Wei Weihao Feng Xuehua Wu Pengfei Wu Hang Li Zhenyi Zhu Zhe Wang Research on the combined control of tunnel deformation adjacent to the foundation pit by servo steel strut and capsule grouting Scientific Reports Shield tunnel Servo steel strut Capsule grouting Active control Model test |
| title | Research on the combined control of tunnel deformation adjacent to the foundation pit by servo steel strut and capsule grouting |
| title_full | Research on the combined control of tunnel deformation adjacent to the foundation pit by servo steel strut and capsule grouting |
| title_fullStr | Research on the combined control of tunnel deformation adjacent to the foundation pit by servo steel strut and capsule grouting |
| title_full_unstemmed | Research on the combined control of tunnel deformation adjacent to the foundation pit by servo steel strut and capsule grouting |
| title_short | Research on the combined control of tunnel deformation adjacent to the foundation pit by servo steel strut and capsule grouting |
| title_sort | research on the combined control of tunnel deformation adjacent to the foundation pit by servo steel strut and capsule grouting |
| topic | Shield tunnel Servo steel strut Capsule grouting Active control Model test |
| url | https://doi.org/10.1038/s41598-025-07678-z |
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