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Experimental evaluation demonstrates reduced settlement and increased load capacity in reinforced weak subgrade soils, highlighting a viable method for rural road stabilization.
More than 80% of Bangladesh covered by soft alluvial floodplain soils, posing significant challenges to road and embankment stability under heavy traffic and monsoon conditions. This study evaluates the performance of three-layer polyester geocell reinforcement in improving weak sandy-clayey subgrade soil collected from Ghior, Manikganj, Bangladesh. Polyester geocell panels (2mm thickness,400GSM) were installed in three layers with 38mm vertical spacing. Geocell reinforcement reduced peak settlement by 34-38.5% (average 36.7%) and increased load-bearing capacity by 50-53.33% (average 51.1%) under all loading conditions. It also reduced peak subgrade pressure by 40-60%, indicating improved stress distribution. Boundary effects were also evaluated. The findings demonstrate the multi-layered geocell reinforcement in an effective and economical solution for improving weak subgrade in rural road and embarkment in Bangladesh.
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Banik et al. (2026) studied this question.
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