engineering recuitment WBPSC JE Civil Mock Test 2022 Soil Mechanics and Foundation Engineering Earth Pressure
For the horizontal backfill, the coefficient of passive earth pressure for retaining wall become:
1
Cp = (1 - sin ϕ)/ (1 + sin ϕ)
2
Cp = (1 + sin ϕ)/ (1 - sin ϕ)
3
Cp = (sin ϕ + 1)/ (sin ϕ - 1)
4
Cp = (sin ϕ - 1)/ (sin ϕ + 1)