In Problem 16.12, what would be the active thrust Pa when there is a surcharge of 25 kN/m² at the ground level?

Problem 16.12

Refer to Figure 16.14a. For H = 6 m, γ = 17.0 kN/m³, f' = 36°, c' = 0, β = 85°, α = 10°, and δ' = 24°, assume that the backfill is in the active state and use Coulomb’s equation to determine the magnitude, location, and direction of the active thrust on the wall.

Figure 16.14

Pa(max) Active force Ci Wall movement i away from soil C A B- 8' c' = 0 R W H R (b) H/3 B (a) +---S