Monitoring and analysis of PHC pipe piles under hydraulic jacking using FBG sensing technology

Guo Wei Li, Hua Fu Pei, Jianhua Yin, Xiao Cen Lu, Jun Teng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

24 Citations (Scopus)

Abstract

Pretensioned high-strength concrete (PHC) pipe piles have been widely used for geotechnical engineering such as foundation engineering, slope engineering, highway engineering. To study the performance of a PHC pipe pile under hydraulic jacking, the monitoring of the strain profile along the PHC pipe pile under hydraulic jacking was carried out using FBG sensing technology. In this study, a PHC pipe pile was instrumented with two series of fiber Bragg grating (FBG) sensors along pile axial direction and was then installed in the field using a hydraulic jacking method. To monitor the variation of strains along a PHC pile, two series of eight FBG strain sensors with different peak wavelengths were mounted on opposite sides of the pile with one meter spacing. In addition, based on the pile theory, both the axial force of the pile and average shear stress on the pile surface are calculated using the measured axial strains. It is found that there were significant residual strains in the piles after installation when hydraulic force was removed. This study confirms that the fiber Bragg grating (FBG) sensors are suitable for monitoring strain distribution along a pile under hydraulic jacking.
Original languageEnglish
Pages (from-to)358-367
Number of pages10
JournalMeasurement: Journal of the International Measurement Confederation
Volume49
Issue number1
DOIs
Publication statusPublished - 1 Jan 2014

Keywords

  • Fiber Bragg grating (FBG)
  • Hydraulic jacking
  • Pile
  • Pretensioned high-strength concrete (PHC)
  • Strain
  • Stress

ASJC Scopus subject areas

  • Statistics and Probability
  • Education
  • Condensed Matter Physics
  • Applied Mathematics

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