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Numerical investigation on installation process of displacement pile

Duan, N; Lu, Y; Cheng, YP; (2019) Numerical investigation on installation process of displacement pile. In: Proceedings of the 53rd U.S. Rock Mechanics/Geomechanics Symposium. American Rock Mechanics Association (ARMA) Green open access

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Abstract

The fundamental mechanisms governing the behaviour of displacement piles in sand are not well comprehended, leading to unreliability in design methods. Understanding the soil responses during monotonic jacking can help improve the pile foundation design. This paper presents numerical results from a two-dimensional discrete element method (DEM), and the influence of soil properties is investigated. The soil responses were examined in terms of displacement, stress and porosity distributions during monotonic jacking, and the Grid Method (GM) was used during sample preparation. The simulation results show great resemblance to the experimental phenomenon. An interface zone adjacent to the pile shaft is observed to comprise of both of both varying stress states and volumetric states while the pile-soil interface is being sheared. The horizontal stress that acted on the pile shaft reduced in response to installation.

Type: Proceedings paper
Title: Numerical investigation on installation process of displacement pile
Event: 53rd U.S. Rock Mechanics/Geomechanics Symposium
Location: New York (NY), USA
Dates: 23rd-26th June 2019
Open access status: An open access version is available from UCL Discovery
Publisher version: https://www.onepetro.org/conference-paper/ARMA-201...
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
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/10087601
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