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DEM study of particle scale and penetration rate on the installation mechanisms of screw piles in sand

DEM study of particle scale and penetration rate on the installation mechanisms of screw piles in sand
DEM study of particle scale and penetration rate on the installation mechanisms of screw piles in sand
Screw piles are efficient anchors to sustain large uplift loads and can be installed with low noise or vibration. Screw piles dimensions are currently increasing, renewing research interest to reduce the installation requirements (torque and crowd or vertical force). The Discrete Element Method (DEM) is an ideal technique to investigate the complex soil behaviour during screw pile installation. Different techniques such as particle upscaling or increase of pile penetration rate have been used to reduce the CPU time to more acceptable durations (e.g. few days or weeks). This paper investigates how such techniques can affect the accuracy of the results and change the installation mechanisms. Results show that maintaining a low particle scaling factor is essential to reproduce the correct mechanism at low pile advancement ratio (AR, defined as the vertical displacement per rotation divided by the helix pitch). The pile overflighting (AR≤1) creates an upwards movement of particles, which in turn creates some tension in the pile. Smaller advancement ratios require smaller particles to accurately capture this effect. Results also show that the pile penetration rate must be maintained relatively low to avoid spurious inertial effects.
Anchors, Discrete Element Method (DEM), Helical Piles, Screw Piles
0266-352X
Cerfontaine, Benjamin
0730daf4-9d6b-4f2d-a848-a3fc54505a02
Ciantia, Matteo
a96c5e90-142b-4dae-9369-4c6c54d130d0
Brown, Michael
a653384d-4fa7-4987-b03c-8a6ce153c6e7
umar Sharif, Yaseen
434548eb-2d00-4815-b808-4120773f0ed6
Cerfontaine, Benjamin
0730daf4-9d6b-4f2d-a848-a3fc54505a02
Ciantia, Matteo
a96c5e90-142b-4dae-9369-4c6c54d130d0
Brown, Michael
a653384d-4fa7-4987-b03c-8a6ce153c6e7
umar Sharif, Yaseen
434548eb-2d00-4815-b808-4120773f0ed6

Cerfontaine, Benjamin, Ciantia, Matteo, Brown, Michael and umar Sharif, Yaseen (2021) DEM study of particle scale and penetration rate on the installation mechanisms of screw piles in sand. Computers and Geotechnics, 139, [104380]. (doi:10.1016/j.compgeo.2021.104380).

Record type: Article

Abstract

Screw piles are efficient anchors to sustain large uplift loads and can be installed with low noise or vibration. Screw piles dimensions are currently increasing, renewing research interest to reduce the installation requirements (torque and crowd or vertical force). The Discrete Element Method (DEM) is an ideal technique to investigate the complex soil behaviour during screw pile installation. Different techniques such as particle upscaling or increase of pile penetration rate have been used to reduce the CPU time to more acceptable durations (e.g. few days or weeks). This paper investigates how such techniques can affect the accuracy of the results and change the installation mechanisms. Results show that maintaining a low particle scaling factor is essential to reproduce the correct mechanism at low pile advancement ratio (AR, defined as the vertical displacement per rotation divided by the helix pitch). The pile overflighting (AR≤1) creates an upwards movement of particles, which in turn creates some tension in the pile. Smaller advancement ratios require smaller particles to accurately capture this effect. Results also show that the pile penetration rate must be maintained relatively low to avoid spurious inertial effects.

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DEM study of particle scale and penetration rate on the installation mechanisms of screw piles in sand - Accepted Manuscript
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More information

Accepted/In Press date: 30 July 2021
e-pub ahead of print date: 20 August 2021
Published date: 20 November 2021
Additional Information: Publisher Copyright: © 2021 Elsevier Ltd
Keywords: Anchors, Discrete Element Method (DEM), Helical Piles, Screw Piles

Identifiers

Local EPrints ID: 452005
URI: http://eprints.soton.ac.uk/id/eprint/452005
ISSN: 0266-352X
PURE UUID: 85f43715-aff4-46df-ab3d-6728aa0c2931
ORCID for Benjamin Cerfontaine: ORCID iD orcid.org/0000-0002-4833-9412

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Date deposited: 08 Nov 2021 17:32
Last modified: 17 Mar 2024 06:53

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Contributors

Author: Matteo Ciantia
Author: Michael Brown
Author: Yaseen umar Sharif

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