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DEM investigation of installation responses of jacked open-ended piles

Liu, Junwei, Duan, Nuo, Cui, Liang and Zhu, Na (2019) DEM investigation of installation responses of jacked open-ended piles Acta Geotechnica.

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Revised manuscript AGEO-D-18-00399-Junwei Liu-2.docx - Accepted version Manuscript
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This paper presents a Discrete Element modelling of the installation responses of rigid open-ended piles with different diameters. A two-dimensional model of granular soil is generated using the Particle Flow Code (PFC). The model is generated under 100g gravity to simulate deep foundations. The simulation results show good agreement with the published experimental measurements. Particle-scale information is retrieved to reveal the micromechanics underlying these dynamic behaviours. It is found that relative particle displacement field provides clear micro-scale evidence to the development of shear zones. The instantly fully plugged mode and the partially plugged mode continuously exchange during pile installation, which is more apparent in slimmer pile. Pile base resistance (plug resistance plus annulus resistance) contributes to the majority of pile resistance. The plug resistance is only concentrated within the zone 2-3 times of pile diameter above the pile base. The unit lateral resistance at a specific depth decreases in pile installation. Pile installation causes increases in the average stresses surrounding the pile, with the major influence zone concentrated within six times of pile diameter.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Civil and Environmental Engineering
Authors :
Liu, Junwei
Duan, Nuo
Zhu, Na
Date : 3 June 2019
DOI : 10.1007/s11440-019-00817-7
Copyright Disclaimer : © Springer-Verlag GmbH Germany, part of Springer Nature 2018
Uncontrolled Keywords : Discrete element modelling; Open-ended pile; Soil plug; Shear zone; micro-mechanics
Depositing User : Charlene King
Date Deposited : 29 May 2019 10:32
Last Modified : 14 Aug 2019 14:22

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