At Rest Earth Pressure on Basement Wall
At Rest Earth Pressure on Basement Wall
(OP)
Would you recommend using an equivalent fluid pressure for at rest pressure or a rectangular distribution.
If rectangular, what formula do you recommend?
If rectangular, what formula do you recommend?





RE: At Rest Earth Pressure on Basement Wall
I'm on a crusade
Bon chance!
DRG
RE: At Rest Earth Pressure on Basement Wall
f-d
¡papá gordo ain't no madre flaca!
RE: At Rest Earth Pressure on Basement Wall
I was recently looking over some problems in order to prepare for SE/PE test. I know this is frowned upon in this forum but I hope you'll consider answering.
The problem is a simple one.
Calculate the total lateral FORCE per meter on a retaining wall AT REST given:
H= 4m (wall height)
Gamma = 16.0 kn/m^3
phi= 28º
c=0
q= 10.0 kn/m^2 surcharge.
I calcualte the total force as 89.04 Kn/M
The problem says 78.44...whats wrong here?
RE: At Rest Earth Pressure on Basement Wall
At rest coef = 1-sin phi=.53
Avg vert press = 10+ 2 x 16=42
Avg lateral pressure = 42 x .53=22.26
Force = 4 x 22.26=89.04
Maybe some other formula was used for Ko, maybe to account for wall friction?
RE: At Rest Earth Pressure on Basement Wall
Thank you.
They simply added (gamma + q) and multiplied by Ko to get a triangular ditribution. Ko= 0.53, like you show.
My thinking was to have a retangular distribution from "q" + triangular from gamma adding up to make a trapezoid.
So I have:
(q * Ko) = 5.3 KN/m
+
(Gamma *h * Ko) = 33.92 KN/m @ base of all and zero at top.
so the total force is (5.3*4) + (33.92*4)/2 = 89.04
I think the problem must be wrong.