Zhongrui WANG, Shaohua ZHU, Yang CHEN, Houqing LU, Yangyang SUN, Hongbo HAN, Zhigang ZHANG. Application of OFDR Distributed Optical Fiber Sensing in Horizontal Displacement Measurement of Deep Soil[J]. Optoelectronic Technology, 2021, 41(4): 295
- Optoelectronic Technology
- Vol. 41, Issue 4, 295 (2021)
Fig. 1. Schematic of inclinometer tube
Fig. 2. Force analysis of bending deformation of inclinometer tube
Fig. 3. Calculation diagram of inclinometer tube
Fig. 4. Optical fiber layout on the inclinometer tube
Fig. 5. Photo of displacement measurement experiment site
Fig. 6. Schematic of the boundary conditions of the displacement measurement experiment
Fig. 7. Comparison of displacement measured by optical fiber and dial gauge displacement
Fig. 8. The location of the test foundation pit and its surrounding environment
Fig. 9. Steel strand strain optical cable
Fig. 10. Fiber-optic inclinometer sensors arranged in the ground connecting wall steel cage and the soil
Fig. 11. Fiber optic inclinometer point after installation
Fig. 12. Photo of foundation pit excavation site
Fig. 13. Denoising results of DBSCAN algorithm
Fig. 14. Comparison of initial strain and displacement of CX2 measuring point on October 13
Fig. 15. Comparison of initial strain displacement of TX4 measuring point on October 15
Fig. 16. Comparison of fiber displacement of CX2 measuring point and displacement of inclinometer and displacement error
Fig. 17. Comparison of fiber displacement of TX4 measuring point and displacement of inclinometer and displacement error
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Table 1. Comparison of automatic monitoring methods of horizontal displacement
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