Field experiments at three sites to investigate the effects of age on steel piles driven in sand

Field experiments at three sites to investigate the effects of age on steel piles driven in sand

Carroll, R. (Norwegian Geotechnical Institute)
Carotenuto, P. (Norwegian Geotechnical Institute)
Dano, C. (Université Grenoble Alpes)
Salama, I. (Université Grenoble Alpes)
Silva, M. (Universidad Técnica Federico Santa María)
Rimoy, S. (University of Dar Es Salaam)
Gavin, Kenneth (TU Delft Geo-engineering)
Jardine, R. (Imperial College London)

2020

This paper investigates the influences that steel type, in situ soil properties, water table depth, pile diameter, roughness and driving procedures have on the ageing behaviour of piles driven in sand. Tension tests have been performed on 51 open-ended steel micro-piles, with 48 to 60 mm outside diameter, driven at well-established research sites at Larvik in Norway, Dunkirk in France and Blessington in Ireland to better understand the processes that control axial capacity set-up trends in the field. Mild steel, stainless and galvanised steel micro-piles were driven and left to age undisturbed for periods of between 2 h and 696 days before being subjected to first-time axial tension load tests. In addition to reporting and interpreting these experiments, further investigations of the sites' geotechnical profiles are reported, including new piezocone and seismic cone penetration soundings as well as laboratory tests. Integration with earlier ageing studies at the same sites with larger (340 to 508 mm outside diameter) open-ended steel piles driven to 7 to 20 m embedments and experiments that varied the piles' initial surface roughness shows that corrosion, pile scale, roughness, the bonding of soil particles and the driving process can all be highly significant. New insights are gained into the mechanisms that control the axial capacity of piles driven in sand.

model tests
offshore engineering
piles & piling
sands
time dependence

http://resolver.tudelft.nl/uuid:51d85957-38e9-410d-9ad5-2f7b9fcddca3

https://doi.org/10.1680/jgeot.17.P.185

2020-11-18

0016-8505

Geotechnique: international journal of soil mechanics, 70 (6), 469-489

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2020 R. Carroll, P. Carotenuto, C. Dano, I. Salama, M. Silva, S. Rimoy, Kenneth Gavin, R. Jardine