Experimental Investigation of Response of Different Granular Soil–3D Geogrid Interfaces Using Large-Scale Direct Shear Tests

This paper investigates the effect of reinforcement forms on the interface shear strength of geosynthetic-reinforced granular soil by conducting a set of large-scale direct shear tests. Three sands of different size (fine, medium, and coarse) and fine gravel of particle size between 0.075 and 10 mm were used for the study. Planar and three-dimensional (3D) geogrids of triangular and rectangular forms were adopted as the reinforcing material. The...