Laser & Optoelectronics Progress, Volume. 57, Issue 21, 210603(2020)
Structural Health Monitoring of Large-Section Tunnel of Jingxiong High-Speed Railway Based on Fiber Bragg Grating Monitoring Technology
Figures & Tables(9)
Fig. 1. Sectional circumferential strain monitoring. (a) FBG strain gauge; (b) layout of strain gauges in tunnel section; (c) installation of strain gauge
Fig. 3. Monitoring of bidirectional displacement of deformation joints. (a) layout of displacement meter in tunnel section; (b) FBG displacement meter; (c) installation of bidirectional displacement meter
Fig. 4. Layered settlement monitoring. (a) Layout of layered settlement meter and bedrock mark; (b) FBG static level
Fig. 5. Layout of sensors for structural health monitoring of Jingxiong high-speed railway tunnel with large section
Fig. 8. Average strain of 14 measurement points at DK51 + 907 cross section varying with time during filling
Fig. 9. Internal force changes of 14 measurement points at DK51 + 907 cross section during filling. (a) Axial force; (b) bending moment
Table 1. Statistics of average strain at each measurement point during pouring
View tableTable 1. Statistics of average strain at each measurement point during pouring
Measurement point Strain during pouring /με Measurement point Strain during pouring /με Maximum Average Minimum Maximum Average Minimum 1 8.7 -13.8 -29.1 2 23.3 -10.1 -27.8 14 6.5 -34.2 51.8 3 -0.6 -30.2 -40.4 13 -0.5 -29.2 -41.7 4 -0.9 -26.9 -34.6 12 0.0 -29.0 -38.2 5 -0.2 -6.5 -9.9 11 -0.1 -7.1 -10.1 6 -0.2 -6.0 -9.0 10 -0.1 -5.0 -6.9 7 5.2 3.2 0.1 9 4.8 3.2 -0.2 8 2.2 -3.3 -6.2
Table 2. Statistics of average strain at each measurement point during filling
View tableTable 2. Statistics of average strain at each measurement point during filling
Measurement point Strain during filling /με Measurement point Strain during filling /με Maximum Average Minimum Maximum Average Minimum 1 -7.3 -40.8 -68.8 2 -13.7 -42.4 -68.8 14 -13.6 -39.2 -51.2 3 -1.5 -27.8 -49.8 13 -7.7 -59.9 -90.8 4 0.7 -29.9 -48.6 12 -3.5 -28.9 -48.9 5 -0.5 -23.1 -43.5 11 3.1 -5.6 -24.3 6 -4.2 -21.7 -42.5 10 5.5 -1.2 -12.6 7 5.4 -12.4 -37.7 9 4.7 -7.4 -21.7 8 -4.8 -12.9 -27.1
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Wu Jinghong, Ye Shaomin, Zhang Jiqing, Zhao Qing, Zhang Wenxuan. Structural Health Monitoring of Large-Section Tunnel of Jingxiong High-Speed Railway Based on Fiber Bragg Grating Monitoring Technology[J]. Laser & Optoelectronics Progress, 2020, 57(21): 210603
Paper Information
Category: Fiber Optics and Optical Communications
Received: Feb. 20, 2020
Accepted: --
Published Online: Oct. 26, 2020
The Author Email: Jinghong Wu (wjh@mail.usts.edu.cn)
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