Set-up of pile shaft friction in laboratory chamber tests
- 1 June 2014
- journal article
- Published by Thomas Telford Ltd. in International Journal of Physical Modelling in Geotechnics
- Vol. 14 (2), 21-30
- https://doi.org/10.1680/ijpmg.13.00017
Abstract
Although field evidence of increases in pile shaft friction over time (i.e. set-up) in sand is compelling, the observations are highly scattered and the mechanisms leading to the increases are poorly understood. Several attempts have been made to model the phenomenon using small-scale physical models in a controlled environment, but the investigations were hampered by numerous restrictions. This paper describes an improved small-scale model pile experiment designed to investigate the ageing effects of pile shaft friction in sand. Details of the experimental set-up adopted and procedures employed are presented. Results show that the phenomenon of pile set-up is successfully modelled and that load–displacement characteristics are in keeping with those observed in centrifuge tests. Although the ageing effects observed in this laboratory-scale physical model may not be directly applicable to field scale piles, comparative studies involving various influential parameters provide qualitative indications of the relative influence of a variety of parameters on the phenomenon.Keywords
This publication has 25 references indexed in Scilit:
- A model-scale investigation into ‘set-up’ of displacement piles in sandPublished by Taylor & Francis Ltd ,2006
- Some observations of the effects of time on the capacity of piles driven in sandGéotechnique, 2006
- Lateral stress changes and shaft friction for model displacement piles in sandCanadian Geotechnical Journal, 2005
- Seasonal dependence of in situ test parameters in sand above the water tableGéotechnique, 2004
- Interpretation of calibration chamber tests involving cone penetrometers in sandsGéotechnique, 2002
- Model Tests for Uplift Resistance of Piles in SandGeotechnical Testing Journal, 1998
- Effect of aging on the penetration resistance of sandsCanadian Geotechnical Journal, 1995
- Calibration chamber tests of a cone penetrometer in sandGéotechnique, 1988
- Tests of the interface between sand and steel in the simple shear apparatusGéotechnique, 1987
- Factors Affecting Sand Specimen Preparation by RainingGeotechnical Testing Journal, 1987