Failure analyses of open-ended pre-stressed high-strength concrete pile during driving: insights from distributed fiber optic sensing

Hong Hu Zhu, Jing Wang, Wei Zhang, Wen Bin Suo, Bin Shi, Assaf Klar

Research output: Contribution to journalArticlepeer-review

Abstract

Open-ended pre-stressed high-strength concrete (PHC) pipe piles are susceptible to progressive distortion and even failure in the vicinity of the pile toe during driving into stiff soil or rock strata. This paper presents an experimental investigation conducted as part of a power plant construction in Huainan, China. After 50 piles were driven in the initial phase, the toe of 9 piles were detected as damaged using the sonic echo testing method. In the second construction phase, four piles were instrumented with longitudinal and circumferential fiber optic cables, as well as discrete strain gauges. The recorded responses of pipe piles throughout their driving process are analyzed to reveal the causes of damages. The results show that a maximum circumferential tensile stress developed at a distance of 1/6 pile length above the pile toe, with its value three times greater than that in other cross-sections. This high circumferential stress results in transverse cracks and the failure of open-ended PHC piles and is believed to be related to the formation of soil plugs. The findings provide valuable insights into performance evaluation of driven open-ended PHC piles.

Original languageEnglish
JournalActa Geotechnica
DOIs
StateAccepted/In press - 2024

Keywords

  • Brillouin optical time-domain analysis (BOTDA)
  • Failure analysis
  • Open-ended pile
  • Pile driving
  • Soil plug

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Earth and Planetary Sciences (miscellaneous)

Fingerprint

Dive into the research topics of 'Failure analyses of open-ended pre-stressed high-strength concrete pile during driving: insights from distributed fiber optic sensing'. Together they form a unique fingerprint.

Cite this