Yonghong Wang, Mingyi Zhang, Jiaxiao Ma, Xiaoyu Bai, Suchun Yang. Measurements of Penetration Characteristics of Jacked Piles in Clayey Soil Based on Fiber Bragg Gratings[J]. Acta Optica Sinica, 2020, 40(7): 0706004
- Acta Optica Sinica
- Vol. 40, Issue 7, 0706004 (2020)
Fig. 1. Working principle of the fiber Bragg grating sensor
Fig. 2. Working principle structure of sensors
Fig. 3. Installation of full-section dynamic spoke pressure sensor at pile end
Fig. 4. FBG soil pressure sensor emplacement at pipe top
Fig. 5. FBG sensors installation of pile. (a) Outside pile; (b) inside pile
Fig. 6. Relationship between pile end resistance and driving length of test pile TP2
Fig. 7. Relationship between pile driving pressure obtained by strain sensors and pressure sensors and driving length of test piles TP2 and TP3
Fig. 8. Variation of pile driving pressure obtained by pressure sensors with pile driving length
Fig. 9. Variation of pile end resistance with pile driving length
Fig. 10. Variation of side frictional resistance of inner and outer tube of open test pile TP1 with pile driving length
Fig. 11. Variation of side frictional resistance with pile driving length
Fig. 12. Variation curves of axial force of piles. (a) Inner tube of test pile 1; (b) outer tube of test pile 1; (c) test pile 2; (d) test pile 3
Fig. 13. Variation curves of unit side frictional resistance of piles. (a) Inner tube of test pile 1; (b) outer tube of test pile 1; (c) test pile 2; (d) test pile 3
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Table 1. FBG soil pressure sensor parameters
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Table 2. Model pipe pile parameter table
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Table 3. FBG Parameter
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