Earth slopes stabilization is one of the main issues in geotechnical engineering. The use of stone columns is one of the approaches for properly increasing the safety factor of earth slopes of the soil embankments. Furthermore, it is economically efficient and is easy in implementation. The present paper aims at an experimental comparison of the Ordinary Stone Column (OSC) and Rigid Stone Column (RSC) behaviors in sandy slopes. These tasks were carried out by constructing an embankment sandy slope, and then, saturating it with rain and, finally, loading increment. The experimental results of laboratory modeling have been also verified through the three-dimensional finite difference method. Laboratory modeling and numerical analyses results showed that the existence of rigid stone column in the middle of the slope (as the optimal placement location) enhances the sandy slope stability up to 1.36 times compared with a slope reinforced by ordinary stone columns.
