Skip to content

This study aims to investigate the bearing capacity of embedded square footings rested on geogrid reinforced sand under eccentric loading conditions. The embedment depth of the footings was 0.25B (B=breadth of the footing) in the study. Single layer geogrid reinforcement was placed at four different depths (u/B=0.25, 0.50, 0.75 and 1.00) and the square footing was loaded in central, uniaxial and biaxial (also called double) eccentricity. Two different uniaxial and two different biaxial eccentric loading points were selected in the laboratory tests. The width of square model footing used in the model tests was 0.20m. The improvements in the bearing capacity were determined through the vertical load versus settlement curves which drawn after the test. Also variations in the bearing capacity were interpreted in terms of BCR (Bearing Capacity Ratio). Another topic investigated in this study is the effect of footing size. For that purpose, three different square footing widths (B=0.20m, 0.30m and 0.40m) were used in the experimental study. Single layer geogrid reinforcement was placed at the four different depths and the footings were loaded only in biaxial eccentricity. The variations in the bearing capacity with different footing sizes and geogrid reinforcement depths were investigated. The tests were performed in the Geotechnical Laboratory of Civil Engineering Department at Iskenderun Technical University, Iskenderun, Hatay, Turkey. A total of 33 laboratory model tests were performed in this study. The results showed that the geogrid reinforcement had a remarkable effect on the bearing capacity. The bearing capacity decreases with increasing eccentricity. Also it was observed that the depth of single layer geogrid reinforcement is a significant factor for the bearing capacity.