Volume 47, N. 3

Special Issue: Deformation Characteristics of Geomaterials: Honorary & Special Lectures (Invited Editors: S. Rios, A. Viana da Fonseca, C. Ferreira), in progress, July-September 2024

In-situ and laboratory characterisation of stiff and dense geomaterials for driven pile analysis and design

Article

Volume 47, N. 3, Special Issue: Deformation Characteristics of Geomaterials: Honorary & Special Lectures (Invited Editors: S. Rios, A. Viana da Fonseca, C. Ferreira), in progress, July-September 2024 | DOWNLOAD PDF (29 downloads)

Abstract

Integrated field and laboratory characterisation of geomaterial behaviour is critical to foundation analysis and design for a wide range of offshore and onshore infrastructure. Challenges include the need for high-quality sampling, addressing natural and induced micro-to-macro structures, and applying soil and stress states that represent both in-situ and in-service conditions. This paper draws on the Authors’ recent research with stiff glacial till, dense marine sand and low-to-medium density chalk, and focuses particularly on these geomaterials’ mechanical behaviour, from small strains to failure, their anisotropy and response to cyclic loading. It considers a range of in-situ techniques as well as highly instrumented monotonic and cyclic stress-path triaxial experiments and hollow cylinder apparatus tests. The outcomes are shown to have important implications for the analysis of large driven piles under monotonic-and-cyclic, axial-and-lateral loading, and the development of practical design methods. Also highlighted are the needs for approaches that integrate field observations, advanced sampling and laboratory testing, numerical and theoretical modelling.

Keywords: Laboratory testing, Glacial till, Dense sand, Chalk, Driven piles, Offshore Engineering,


Submitted on August 23, 2023.
Final Acceptance on February 19, 2024.
Discussion open until November 30, 2024.
DOI: 10.28927/SR.2024.009323