Year: 2023 | Month: December | Volume: 10 | Issue: 12 | Pages: 294-304
DOI: https://doi.org/10.52403/ijrr.20231232
Geosynthetic Reinforcement: A Strategy for Preventing Deformation of Flexible Pavements on Unstable Ground
Koffi Judicael Agbelele1,2,3,4, Daniel Yémalin Agossou2,3, Crépin ZEVOUNOU5, Bill Jephté OTENIA4, Oriane Marcienne Eudoxie SOGLO2, Julien Babarinde KOUDORO2
1Higher Normal School of Technical Education (ENSET), Lokossa, Republic of Benin
2National University of Sciences, Technology, Engineering and Mathematics (UNSTIM), Abomey, Republic of Benin
3Laboratory of Test and Studies in Civil Engineering (L2EGC), Abomey, Republic of Benin
4Materials and Structures Laboratory (LAMS), Cotonou, Republic of Benin
5Laboratory of Energetics and Applied Mechanics (LEMA), Abomey-Calavi, Republic of Benin
Corresponding Author: Koffi Judicael Agbelele
ABSTRACT
This study assesses the effectiveness of geosynthetic reinforcement for flexible pavements on unstable ground. The methodology includes geotechnical data collection and modelling with Alizé LCPC and PLAXIS 2D 8.2. The results highlight the importance of geogrid reinforcement. Vertical deformations are reduced by the geogrids, with values of 3.44.
m (phase 0 unreinforced), 2.65.
m (phase 1 reinforced) and 2.07.
m (phase 2 reinforced with reduced thickness). Horizontal deformations show an improvement of 117.07.
% (reinforced pavement) compared with 51.54.
% (reduced thickness). Vertical deformations showed a significant reduction, with 141.84.
% (reinforced pavement with thickness reduction) compared with 171.32.
% (reinforced pavement). In summary, geogrid reinforcement in flexible pavements offers an effective reduction in deformation. Combined with optimisation of the subgrade thickness, this strategy improves stability, strength and bearing capacity. This approach can be extrapolated to other road contexts for a better understanding of its benefits.
Keywords: Geogrids, Deformations, Flexible pavements, Unstable soils
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