Offset Surcharge on Broken Back Slope - Boussinesq / Elastic Methods
Offset Surcharge on Broken Back Slope - Boussinesq / Elastic Methods
(OP)
When you have an offset surcharge on top of a broken back slope and using elastic methods, such as boussinesq, do you adjust the angles to the load accordingly and apply the formulas as normal? or do you apply the surcharge at the top of the wall elevation and apply the soil as an overburden pressure? Or model the slope to get an active pressure of the soil and model the surcharge at the elevation of the wall basically disregarding the fact that it is on top of the slope?
Thanks!
Thanks!





RE: Offset Surcharge on Broken Back Slope - Boussinesq / Elastic Methods
RE: Offset Surcharge on Broken Back Slope - Boussinesq / Elastic Methods
EIT
www.HowToEngineer.com
RE: Offset Surcharge on Broken Back Slope - Boussinesq / Elastic Methods
RE: Offset Surcharge on Broken Back Slope - Boussinesq / Elastic Methods
I have used other methods but you need to use their loading or get ready for a big fight. I have not found RR people to be reasonable as a rule so it really depends on who the approving engineer is.
RE: Offset Surcharge on Broken Back Slope - Boussinesq / Elastic Methods
For example:
Strip load; q=1000psf
distance to strip load from wall x1 = 10ft
width of strip b = 10ft
height to strip load above wall h1 = 4ft
Slope of surcharge through soil; S=2V:1H
New distance to strip load = x1new = x1 - h1/S
New width of strip load = bnew = (b+2*(h1/S)
Find new strip load
P=q*b => qnew = P/(bnew)
Use 'new' variables in elastic method equation (i.e. Boussinesq)
EIT
www.HowToEngineer.com