M. Rahimi
Experimental and numerical investigation of the uplift capacity of plate anchors in geocell-reinforced sand
Rahimi, M.; Moghaddas Tafreshi, S.N.; Leshchinsky, B.; Dawson, Andrew
Authors
S.N. Moghaddas Tafreshi
B. Leshchinsky
Andrew Dawson
Abstract
Plate anchors are frequently used to provide resistance against uplift forces. This paper describes the reinforcing effects of a geocell-reinforced soil layer on uplift behavior of anchor plates. The uplift tests were conducted in a test pit at near full-scale on anchor plates with widths between 150 and 300 mm with embedment depths of 1.5–3 times the anchor width for both unreinforced and geocell-reinforced backfill. A single geocell layer with pocket size 110 mm × 110 mm and height 100 mm, fabricated from non-perforated and nonwoven geotextile, was used. The results show that the peak and residual uplift capacities of anchor models were highest when the geocell layer over the anchor was used, but with increasing anchor size and embedment depth, the benefit of the geocell reinforcement deceases. Peak loads between 130% and 155% of unreinforced conditions were observed when geocell reinforcement was present. Residual loading increased from 75% to 225% that of the unreinforced scenario. The reinforced anchor system could undergo larger upward displacements before peak loading occurred. These improvements may be attributed to the geocell reinforcement distributing stress to a wider area than the unreinforced case during uplift. The breakout factor increases with embedment depth and decreased with increasing anchor width for both unreinforced and reinforced conditions, the latter yielding larger breakout factors. Calibrated numerical modelling demonstrated favorable agreement with experimental observations, providing insight into detailed behavior of the system. For example, surface heave decreased by over 80% when geocell was present because of a much more efficient stress distribution imparted by the presence of the geocell layer.
Citation
Rahimi, M., Moghaddas Tafreshi, S., Leshchinsky, B., & Dawson, A. (2018). Experimental and numerical investigation of the uplift capacity of plate anchors in geocell-reinforced sand. Geotextiles and Geomembranes, 46(6), https://doi.org/10.1016/j.geotexmem.2018.07.010
Journal Article Type | Article |
---|---|
Acceptance Date | Jul 12, 2018 |
Online Publication Date | Jul 25, 2018 |
Publication Date | Dec 1, 2018 |
Deposit Date | Jul 26, 2018 |
Publicly Available Date | Mar 28, 2024 |
Journal | Geotextiles and Geomembranes |
Print ISSN | 0266-1144 |
Electronic ISSN | 0266-1144 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 46 |
Issue | 6 |
DOI | https://doi.org/10.1016/j.geotexmem.2018.07.010 |
Keywords | Geosynthetics, Plate anchor, Geocell layer, Uplift load, Upward displacements, Numerical analysis |
Public URL | https://nottingham-repository.worktribe.com/output/951010 |
Publisher URL | https://www.sciencedirect.com/science/article/pii/S0266114418300712?via%3Dihub |
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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0
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