Experimental Investigations on Load Transfer of PHC Piles in Highway Foundation Using FBG Sensing Technology

Pretensioned spun high-strength concrete (PHC) piles are increasingly used to improve highway foundations with large pile spacing and short pile length without splicing. In this paper, a series of field tests comprising cone penetration tests (CPTs), piling, and static pile load tests were performed to investigate the load transfer mechanism of such PHC piles, the load transfer mechanisms of which are different from that of long piles with splices used in structural foundations. The variation of axial strain along PHC piles was monitored during piling and load tests using fiber Bragg grating (FBG) sensing technology and conventional vibrating wire (VW) strain gauges. The results show the superiority of FBG sensing technology in terms of reliability of data and feasibility of measurement under fast changing axial strain. The experimental data also show significant variation in the shaft and tip resistance during piling and the pile-soil strength limit state of the load tests.

• Record URL:
  https://doi.org/10.1061/(ASCE)GM.1943-5622.0000797
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/15323641
• Supplemental Notes:
  • © 2016 American Society of Civil Engineers.
• Authors:
  • Lu, Xiao-cen
  • Li, Guo-wei
  • Pei, Hua-fu
  • Su, Gao-yu
  • Wu, Jian-tao
  • Amenuvor, Andrew Cudzo
• Publication Date: 2017-6

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 04016123
• Serial:
  • International Journal of Geomechanics
  • Volume: 17
  • Issue Number: 6
  • Publisher: American Society of Civil Engineers
  • ISSN: 1532-3641
  • EISSN: 1943-5622
  • Serial URL: http://ascelibrary.org/journal/ijgnai

Subject/Index Terms

• TRT Terms: Cone penetrometers; High strength concrete; Load transfer; Pile foundations; Soil structure; Strain gages; Structural supports; Support piles
• Subject Areas: Construction; Highways; Materials;

Filing Info

• Accession Number: 01614722
• Record Type: Publication
• Files: TRIS, ASCE
• Created Date: Oct 25 2016 10:00AM