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Element soil behaviour during pile installation simulated by 2D-DEM

Ji, X; Cheng, YP; Liu, J; (2017) Element soil behaviour during pile installation simulated by 2D-DEM. In: EPJ Web of Conferences. (pp. p. 15028). EDP Sciences Green open access

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Abstract

The estimation of the skin friction of onshore or offshore piles in sand is still a difficult problem for geotechnical engineers. It has been accepted by many researchers that the mechanism of driving piles in the soil has shared some similarities with that of an element shear test under the constant normal stiffness (CNS) condition. This paper describes the behaviour of an element of soil next to a pile during the process of pile penetration into dense fine sand using the 2D-DEM numerical simulation software. A new CNS servo was added to the horizontal boundary while maintaining the vertical stress constant. This should simulate the soil in a similar manner to that of a CNS pile-soil interface shear test, but allowing the vertical stress to remain constant which is more realistic to the field situation. Shear behaviours observed in these simulations were very similar to the results from previous researchers' lab shearing tests. With the normal stress and shear stress obtained from the virtual models, the friction angle and the shaft friction factor β mentioned in the API-2007 offshore pile design guideline were calculated and compared with the API recommended values.

Type: Proceedings paper
Title: Element soil behaviour during pile installation simulated by 2D-DEM
Event: Powders and Grains 2017 – 8th International Conference on Micromechanics on Granular Media
Open access status: An open access version is available from UCL Discovery
DOI: 10.1051/epjconf/201714015028
Publisher version: https://doi.org/10.1051/epjconf/201714015028
Language: English
Additional information: This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10040474
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