Ni, Q., Hird, C. C. and Guymer, I. (2010) Physical modelling of pile penetration in clay using transparent soil and particle image velocimetry. Geotechnique, Vol.60 (No.2). pp. 121-132. doi:10.1680/geot.8.P.052 ISSN 0016-8505.

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Abstract

A small-scale physical modelling method was developed to study the movement of clay during pile installation. The clay was simulated using a mixture of amorphous silica and mineral oil, which becomes almost transparent when the refractive indices of the oil and the silica are well matched. After adding reflective particles and consolidating the mixture in a transparent container, cylindrical model piles were driven vertically at the centre. A vertical section aligned with the pile centreline was illuminated by a laser light sheet, and a sequence of digital images was recorded. These were analysed using particle image velocimetry, and the complete displacement distribution during the pile installation was obtained. Notwithstanding some discrepancies at shallow depths, the observed displacements generally showed fairly good agreement with the theoretical predictions of the shallow strain path method (SSPM) once the effect of some soil trapped beneath the flat pile tip was taken into account. Normalisation of the horizontal and vertical components of movement employing both the pile length and radius, based on SSPM theory, was shown to be valid. The normalised vertical displacement contours were similar to those published by previous researchers. The results of this study could be used to assess the impact of disturbance due to pile installation on, for example, buried services or archaeology.

Item Type:	Journal Article
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) Q Science > QE Geology
Divisions:	Faculty of Science, Engineering and Medicine > Engineering > Engineering
Journal or Publication Title:	Geotechnique
Publisher:	ICE Publishing
ISSN:	0016-8505
Official Date:	February 2010
Dates:	Date Event February 2010 Published
Volume:	Vol.60
Number:	No.2
Number of Pages:	12
Page Range:	pp. 121-132
DOI:	10.1680/geot.8.P.052
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Engineering and Physical Sciences Research Council (EPSRC)

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