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)1-18
Number of pages18
JournalGeotechnical and Geological Engineering
DOIs
StateAccepted/In press - Dec 30 2016

Fingerprint

model test
Piles
pile
Soils
digital images
soil
digital image
testing
refractive index
Cast in place concrete
quartz
Jacks
lasers
soil quality
plastics
Quartz
Refractive index
oils
laser
plastic

Keywords

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

ASJC Scopus subject areas

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

Cite this

Soil Deformations During Casing Jacking and Extraction of Expanded-Shoe Piles, Using Model Tests. / Qi, Chang Guang; Iskander, Magued; Omidvar, Mehdi.

In: Geotechnical and Geological Engineering, 30.12.2016, p. 1-18.

Research output: Contribution to journalArticle

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