Influence of Soil Properties on Shear Resistance at Sand-Geogrid Interface in Direct Shear Mode

Abstract: The properties of soil in contact with the geogrid in soil-geogrid interface in shear mode is having major role in resisting the shear force. In the shear failure mode, the particles in contact with each other in aperture area and particles in touch with geogrid are effectively resisting shear force during the shear test. The particles in contact with each other or with geogrid are contributing the resistance. The particle size and their associated voids play an important role in the dissipation of energy under the loading of granular materials. A correlation was formulated by this author considering the actual area of contacts with dry density as variable for the shear resistance at the interface. Based on this formulation, the variation of shear resistance with soil properties is studied in this paper.

Keywords: combined shear resistance; interface shear ;geogrid-soil; passive resistance;shear mode;soil gradation; transverse ribs.