A good agreement in their comparative study for pullout response is also observed. In the absence of literature regarding numerical modelling of helical soil nail, simulation results are validated with uplift responses of helical piles and soil anchors. PLAXIS 2D and 3D are powerful and user friendly finite element package intended for two-dimensional and three-dimensional analyses of deformation and stability in geotechnical engineering and rock mechanics. The response of helical soil nail using axisymmetric finite element simulation is found similar to the uplift behaviour of helical piles and helical soil anchors. The helical plate spacing ratio ( s/ D h) and diameter ratio ( D h/ D s) are found to increase the pullout only up to a critical value. The stability analysis of the road embankment has been done by finite element method using PLAXIS 2D. The pullout capacity is found to increase with increase in number of helical plates. Plaxis 2D (Brinkgreve et al., 2012) emphasises the concept of using axisymmetric condition for simulation of cylindrical elements such as soil anchors. Method of Analysis In order to determine the optimum tensile strength of geotextile as a reinforcement of embankments, the tensile strength of geotextile reinforcement is varied from 100 up to 1000 kN/m. The failure surfaces for various helical soil nail configurations and their pullout mechanisms are also analysed and discussed. The effect of varying number of helical plates, helical plate spacing and helical plate diameter is studied to understand the pullout capacity behaviour. The numerical modelling of actual pullout response is achieved by axisymmetric and horizontal loading condition. An investigation into the pullout response of helical soil nail using finite element subroutine Plaxis 2D is presented.

Plaxis 2d anchor