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Advances in Civil Engineering
Volume 2018, Article ID 2942689, 16 pages
Research Article

Effects of Geofoam Panels on Static Behavior of Cantilever Retaining Wall

1Department of Civil Engineering, East Azerbaijan Science and Research Branch, Islamic Azad University, Tabriz, Iran
2Department of Civil Engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran

Correspondence should be addressed to Rouzbeh Dabiri;

Received 6 July 2017; Revised 18 October 2017; Accepted 26 November 2017; Published 30 January 2018

Academic Editor: Pier Paolo Rossi

Copyright © 2018 Navid Hasanpouri Notash and Rouzbeh Dabiri. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Geofoam is one of the geosynthetic products that can be used in geotechnical applications. According to researches, expanded polystyrene (EPS) geofoam placed directly against a rigid retaining wall has been proposed as a strategy to reduce static loads on the wall. This study employed a finite difference analysis using a 2-D FLAC computer program by considering yielding and nonyielding states for retaining walls to explore the effectiveness of geofoam panels in improving the static performance of cantilever retaining walls. Retaining walls at heights of 3, 6, and 9 meters and geofoam panels with densities of 15, 20, and 25 (kg/m3) at three relative thicknesses of t/H = 0.05, 0.2, and 0.4 were modelled in this numerical study. In addition, the performance of the double EPS buffer system, which involves two vertical geofoam panels, in retaining walls’ stability with four panel spacing (50, 100, 150, and 200 cm) was also evaluated in this research. The results showed that use of EPS15 with density equal to 15 (kg/m3) which has the lowest density among other geofoam panels has a significant role in reduction of lateral stresses, although the performance of geofoam in nonyielding retaining walls is better than yielding retaining walls.