Rankine's Assumptions for Earth Pressure Theory for Active/Passive Pressure
As originally proposed, Rankine's theory is applied to uniform cohesion-less soil only. Later it was extended to include cohesive soil by Bell in 1915. The following cases of active earth pressure on cohesionless backfill will now be considered: Dry or moist backfill
Submerged backfill
Partly submerged backfill
Backfill with uniform surcharge
Backfill with sloping surcharge