Computation of stresses


I am analyzing the gravity retaining wall soil model in PFC3D. I need to find the stresses acting on the retaining wall due to backfill soil. But when I solve it, the stress along the wall becomes zero after some time.

I am following the following procedure:

  1. Create a foundation domain and solve for equilibrium

  2. Generate retaining wall and soil and solve the model for equilibrium

  3. Provide all the required contact properties to the model

  4. Generate measurement spheres at the back of the wall to capture stresses along the wall.

Realistically, there should be stresses along the wall exerted by the backfill soil but I am getting zero. Please help me out with the coding where I am doing wrong. I would really appreciate your help. I can provide the data file if needed.