Week 4 Challenge
EARTHPRESSURE
(1) R.H.S = Pa = Ka x `gamma`x H1
H1 = 7m
assuming `gamma` = 18kN/`m^3`
Ka = `(1-sinphi)/(1+sinphi)`= 0.333
assuming angle of internal friction = `30 @`, for cohesionless coarse grained soil
Pa = 0.333 x 18 x 7 = 42kN/`m^2`
@H = 6.5m = 39kN/ `m^2`
@H = 6.0m = 36kN/ `m^2`
@H = 5.5m = 33kN/ `m^2`
@H = 5.0m = 30kN/ `m^2`
@H = 4.5m = 27kN/ `m^2`
@H = 4.0m = 24kN/ `m^2`
@H = 3.5m = 21kN/ `m^2`
@H = 3.0m = 18kN/ `m^2`
@H = 2.5m = 15kN/ `m^2`
@H = 2.0m = 12kN/ `m^2`
@H = 1.5m = 9kN/ `m^2`
@H = 1.0m = 6kN/ `m^2`
@H = 0.5m = 3kN/ `m^2`
(2) L.H.S = Pa = Ka x `gamma`x H1
H1 = 3m
assuming `gamma` = 18kN/`m^3`
Ka = `(1-sinphi)/(1+sinphi)`= 0.333
assuming angle of internal friction = `30 @`, for cohesionless coarse grained soil
Pa = 0.333 x 18 x 3 = 18kN/`m^2`
@ 3m, = 18kN/ `m^2`
@ 2.5m, = 15kN/ `m^2`
@ 2m, = 12kN/ `m^2`
@ 1.5m, = 9kN/ `m^2`
@ 1m, = 6kN/ `m^2`
@ 0.5m, = 3kN/ `m^2`