Characterisation of Sand-Steel Interface Shearing Behaviour for the Interpretation of Driven Pile Behaviour in Sands

Liu, T., Chen, H., Buckley, R. M. , Quinteros, V. S. and Jardine, R. J. (2019) Characterisation of Sand-Steel Interface Shearing Behaviour for the Interpretation of Driven Pile Behaviour in Sands. In: 7th International Symposium on Deformation Characteristics of Geomaterials (IS-Glasgow 2019), Glasgow, Scotland, 26-29 Jun 2019, (doi: 10.1051/e3sconf/20199213001)

Abstract

The installation and loading of steel piles driven in sands modifies both the piles' surface topography and the characteristics of the granular materials present adjacent to the pile shaft. Large-displacement ring shear interface tests incorporating pre-conditioning stages are capable of reproducing such physical processes in the laboratory and can generate case-specific interface design parameters. This paper summarises laboratory research that characterised the interface shearing behaviour of three natural sandy soils retrieved from field test sites (Dunkirk, France; Blessington, Ireland; Larvik, SE Norway) where extensive piling studies on micro and industrial scale driven piles have been carried out. The programme examined the influences of soil characteristics (physical properties and chemical compositions), interface type (mild steel or stainless steel) and surface roughness, and highlighted the significant effects of normal effective stress level and ageing time duration. Remarkable trends of increasing interface friction angles with elevated normal effective stress levels and prolonged ageing were observed. The results from supplementary small-displacement direct shear interface tests and triaxial tests are also reported. The experiments are interpreted with reference to earlier studies to develop an overview of interface shearing characteristics between steels and sandy soils and provide important insights into the mechanisms of axial capacity increases applying to steel piles driven in sands.

• Item Type: Conference Proceedings
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Buckley, Dr Roisin
• Authors: Liu, T., Chen, H., Buckley, R. M., Quinteros, V. S., and Jardine, R. J.
• College/School: College of Science and Engineering > School of Engineering > Infrastructure and Environment
• ISSN: 2267-1242
• Published Online: 25 June 2019
• Copyright Holders: Copyright © The Authors
• First Published: First published in E3S Web Conf. 92: 13001
• Publisher Policy: Reproduced under a Creative Commons license