Soil Deformations During Casing Jacking and Extraction of Expanded-Shoe Piles, Using Model Tests

Chang Guang Qi, Magued Iskander, Mehdi Omidvar

Research output: Contribution to journalArticle

Abstract

A small-scale 1-g transparent soil model was employed to investigate soil deformations caused by casing-assisted pile jacking of plastic tube cast-in-place concrete piles. The transparent soil was made of fused quartz and a refractive index matched blended oil. Models were sliced with a laser light sheet and digital images were employed to record jacking and extraction of the casing, allowing the use of digital image correlation to derive the generated displacement fields, non-intrusively. The effects of the shoe shape as well as use of a casing to jack the pile were investigated. It was found that under unconfined conditions, soil response to jacking is significantly affected by the pile shoe shape, with displacements adjacent to a conical shoe markedly smaller compared to a flat shoe. Moreover, casing extraction results in recovery of some of the soil deformation that takes place during pile jacking.

Original languageEnglish (US)
Pages (from-to)809-826
Number of pages18
JournalGeotechnical and Geological Engineering
Volume35
Issue number2
DOIs
StatePublished - Apr 1 2017

Keywords

  • Expanded-shoe
  • PIV
  • Particle image velocimetry
  • Physical modeling
  • Transparent soil

ASJC Scopus subject areas

  • Architecture
  • Geotechnical Engineering and Engineering Geology
  • Soil Science
  • Geology

Fingerprint Dive into the research topics of 'Soil Deformations During Casing Jacking and Extraction of Expanded-Shoe Piles, Using Model Tests'. Together they form a unique fingerprint.

  • Cite this