With this online calculator you can calculate pressure on the pipeline from depth of backfilling of the pipeline to the top of the pipe.
Formula:
P = f(m, h, d) - nonlinear calculation
P - pressure on the pipeline
m - vehicle weight
h - depth of backfilling
d - diameter of the pipeline
Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.