Modelling the dynamic pile-soil-pile interaction in a multi-layered half-space

Abstract

Within the context of railway ground-borne vibration, the dynamic pile-soil-pile interaction remains an area that has not been sufficiently investigated. Whilest a number of researchers have scrutinised the vibration response of piled-foundations, their approaches exhibit a compromise between computation time and solution accuracy. In this paper, two models of piled-foundations in a multi-layered half-space are presented; one is an efficient semi-analytical model and another is a fully-coupled boundary element model. The pile is simulated, in both models, by an elastic bar for axial loading and an Euler-Bernoulli beam for transverse loading. A set of comparisons has been performed, including the driving point response of a single pile, the interaction between two piles and the 'far-field' response due to axial and transverse loading on the pile's head. The comparisons reveal that the semianalytical model predicts at most frequencies the driving point response and the dynamic interaction with acceptable accuracy and computational efficiency. It is also highlighted that the semi-analytical model with its present assumptions does not accurately approximate the 'far-field' response

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Identifiers

ORCID for Evangelos Ntotsios: orcid.org/0000-0001-7382-0948

ORCID for D.J. Thompson: orcid.org/0000-0002-7964-5906

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