Use of Vertical Component
Use of vertical component of active lateral soil pressure
This category offers the following three options for considering the vertical component of active lateral soil pressure:
•Use for Soil Pressure
•Use for Sliding Resistance
•Use for Overturning Resistance
When used, the vertical component of the lateral pressure is applied at a vertical plane at the back of the footing.
For a level backfill, this option will back-solve the EFP method to find the equivalent internal friction angle, then apply this vertical component equal to tan β. If the Coulomb method had been chosen, this vertical component would be tangent of ϕ/2.