Study on the Optimized Perception of Structural Behavior in Shield Tunneling by Fiber Grating Layouts
Shield tunnels’ structural stability is challenged due to the fact that they are often built under rivers, lakes, and oceans. It is crucial to execute the structural deformation perception of the shield tunnel. Fiber Bragg grating (FBG) sensing technology is sensitive to deformation information, mak...
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MDPI AG
2024-09-01
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| Online Access: | https://www.mdpi.com/2075-5309/14/9/2888 |
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| author | Rongjun Xing Yufu Li Chuan He Daiqiang Zhu Yujun Li Kun Feng Pai Xu Yu Liu Zhongchao Zhao |
| author_facet | Rongjun Xing Yufu Li Chuan He Daiqiang Zhu Yujun Li Kun Feng Pai Xu Yu Liu Zhongchao Zhao |
| author_sort | Rongjun Xing |
| collection | DOAJ |
| description | Shield tunnels’ structural stability is challenged due to the fact that they are often built under rivers, lakes, and oceans. It is crucial to execute the structural deformation perception of the shield tunnel. Fiber Bragg grating (FBG) sensing technology is sensitive to deformation information, making it one of the greatest options for shield tunnels to perceive structural deformation. In this study, a 1:20 scale model test was carried out to investigate the deformation perception of the shield tunnel structure under three different layouts of surface-mounted FBG sensors. The deformation law of the tunnel is discussed, under the condition of two-factor cross fusion and especially under the condition of constant water pressure and soil pressure change. The results indicate that, under the combined action of water and soil pressure, the uniform water pressure of 0.33 MPa has a stabilizing effect on the segment strain under the vertical load of 0.4 MPa. The traditional four-point layout and the 18° uniform layout are more effective in detecting changes in local tunnel curvature and strain, respectively, compared to the 36° uniform layout mode. It is advised that the traditional four-point layout be used to collect information for other sections’ monitoring and that the 18° uniform layout is for harsh terrain conditions. |
| format | Article |
| id | doaj-art-4bc5e7da06174c4d9c0d6a2ca33b65f7 |
| institution | OA Journals |
| issn | 2075-5309 |
| language | English |
| publishDate | 2024-09-01 |
| publisher | MDPI AG |
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| series | Buildings |
| spelling | doaj-art-4bc5e7da06174c4d9c0d6a2ca33b65f72025-08-20T01:56:01ZengMDPI AGBuildings2075-53092024-09-01149288810.3390/buildings14092888Study on the Optimized Perception of Structural Behavior in Shield Tunneling by Fiber Grating LayoutsRongjun Xing0Yufu Li1Chuan He2Daiqiang Zhu3Yujun Li4Kun Feng5Pai Xu6Yu Liu7Zhongchao Zhao8State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, No. 66, Xuefu Avenue, Nan’an District, Chongqing 400074, ChinaState Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, No. 66, Xuefu Avenue, Nan’an District, Chongqing 400074, ChinaKey Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, ChinaState Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, No. 66, Xuefu Avenue, Nan’an District, Chongqing 400074, ChinaState Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, No. 66, Xuefu Avenue, Nan’an District, Chongqing 400074, ChinaKey Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, ChinaState Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, No. 66, Xuefu Avenue, Nan’an District, Chongqing 400074, ChinaState Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, No. 66, Xuefu Avenue, Nan’an District, Chongqing 400074, ChinaState Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, No. 66, Xuefu Avenue, Nan’an District, Chongqing 400074, ChinaShield tunnels’ structural stability is challenged due to the fact that they are often built under rivers, lakes, and oceans. It is crucial to execute the structural deformation perception of the shield tunnel. Fiber Bragg grating (FBG) sensing technology is sensitive to deformation information, making it one of the greatest options for shield tunnels to perceive structural deformation. In this study, a 1:20 scale model test was carried out to investigate the deformation perception of the shield tunnel structure under three different layouts of surface-mounted FBG sensors. The deformation law of the tunnel is discussed, under the condition of two-factor cross fusion and especially under the condition of constant water pressure and soil pressure change. The results indicate that, under the combined action of water and soil pressure, the uniform water pressure of 0.33 MPa has a stabilizing effect on the segment strain under the vertical load of 0.4 MPa. The traditional four-point layout and the 18° uniform layout are more effective in detecting changes in local tunnel curvature and strain, respectively, compared to the 36° uniform layout mode. It is advised that the traditional four-point layout be used to collect information for other sections’ monitoring and that the 18° uniform layout is for harsh terrain conditions.https://www.mdpi.com/2075-5309/14/9/2888shield tunnelsegment liningmodel testfiber Bragg gratingdeformation perception |
| spellingShingle | Rongjun Xing Yufu Li Chuan He Daiqiang Zhu Yujun Li Kun Feng Pai Xu Yu Liu Zhongchao Zhao Study on the Optimized Perception of Structural Behavior in Shield Tunneling by Fiber Grating Layouts Buildings shield tunnel segment lining model test fiber Bragg grating deformation perception |
| title | Study on the Optimized Perception of Structural Behavior in Shield Tunneling by Fiber Grating Layouts |
| title_full | Study on the Optimized Perception of Structural Behavior in Shield Tunneling by Fiber Grating Layouts |
| title_fullStr | Study on the Optimized Perception of Structural Behavior in Shield Tunneling by Fiber Grating Layouts |
| title_full_unstemmed | Study on the Optimized Perception of Structural Behavior in Shield Tunneling by Fiber Grating Layouts |
| title_short | Study on the Optimized Perception of Structural Behavior in Shield Tunneling by Fiber Grating Layouts |
| title_sort | study on the optimized perception of structural behavior in shield tunneling by fiber grating layouts |
| topic | shield tunnel segment lining model test fiber Bragg grating deformation perception |
| url | https://www.mdpi.com/2075-5309/14/9/2888 |
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