ABSTRACT
This study presents a comprehensive numerical analysis of slopes stabilized by helical soil nails to assess their performance and usefulness in improving slope stability. The studies have been conducted with a three-dimensional finite element software called Plaxis 3D. A full-scale field soil-nailed slope has been modelled and evaluated the performance of helical soil nails. The performance of helical soil nails. Parametric studies include diameter of shaft (Ds), diameter of helices (Dh), spacing between helices (S), angle of inclination (α), and number of helices were also carried out to understand the performance of these soil nails in stabilizing the slopes. The results indicate that helical soil nails exhibit better performance compared to traditional soil nails. They achieve a 4% decrease in horizontal displacement and 23% increase in the factor of safety. The optimal configuration is achieved with a 10° inclination of the nail and a 3-Helix configuration. Furthermore, the factor of safety improves as the ratio of spacing to helix diameter (S/Dh) increases from 1 to 4 for shaft diameters of 25mm and 50mm. The results emphasize the suitability of helical soil nails in improving slope stability by minimizing displacement and increasing the factor of safety against slope failures.
