Experimental and Numerical Investigation on Stability of Reinforced Sandy Slope using Reinforced Stone Column with Horizontally Laminated Geotextile Disks

The aim of this research is to experimentally investigation of ordinary stone column and reinforced stone column using horizontally laminated geotextile disks in stabilizing sandy slopes. The sand slope model saturated through precipitation and reinforced by installing ordinary stone column and horizontal layers of geotextile within the stone column, and then slope crest undergo loading. Accuracy of experimental results confirmed using 3-D finite difference method (FLAC3D). Both experimental and numerical results show that geotextile reinforced stone column in the middle of sandy slope have an impressive impact on increasing stability of reinforced slope. In such way that reinforced stone column, increase shear strength of sandy slope up to 1.5 times more than ordinary stone column.