Numerical Simulation of Footing Resting Near Nail Stabilized Vertical Cut

Abstract

Soil nailing is distinct technique and economical compare to other conventional technique. Parametric study for soil nail wall having Mohr-Coulomb model to define failure criteria with various parameters has been analysed. Soil media is modelled using PLAXIS 2D v8 finite element package. A total of 72 soil nailed models are simulated to examine the effect of excavation depth, nail element length, edge distance of footing from vertical cut, vertical spacing of the nail element. It has been observed that the load carrying capacity of footing is higher at increasing value of nail length to excavation depth ratio (L/H) for particular vertical nail spacing to excavation depth ratio (Sv/H), footing edge distance from face of vertical cut to footing width ratio (X/B) having constant horizontal nail spacing (Sh) and inclination angle (i) of nailing element. The average load carrying capacity at 40 mm settlement is increased by 5.71%, 5.56%; when nail length increased from 0.6H to 0.7H for particular excavation depth (H) of 6 m and 8 m respectively and it is 6.59%, 5.26%; when nail length increased from 0.7H to 0.8H for particular excavation depth (H) of 6 m and 8 m respectively with effect of combined action of Sv and (X).