Ground bearing pressure-retaining wall and reinforcement problem

[marcpreston]

I have been asked to design a retaining wall. I need to check the ground bearing pressure.


The retainiing wall is shown in the pdf

C35 reinforced concrete is used. Surrchagre taken as 10kn/m2. DOT type 1 slag taken as 18kn/m3.

How do i calculate the maximum bearing presure? The allowable is 100kn/m

In addition how would i calculate the reinforcement required? I am guessing that i will be minimum reinforcement.

 

[ishvaaag]

The more common approach would be to design the wall for active push at a vertical plane at the inner tip of the footing of your L shaped wall. You would have the usual sliding and overturning checks with no less than 1.5 safety factors, and would consider in this the wall plus weight of infill and pavement over it (as a mass wall), plus any load above. Correct determination of the resultant of the active push compounded with the vertical always standing weights will give the reactions applied to the soil, and then its vertical and horizontal components can be derived.

 

[rowingengineer]

While this won't awnser your question directly it will give you an idea of how to go about the design of a RW.

http://www.cmaa.com.au/pdf/MA51_E1.pdf

When in doubt, just take the next small step.

 

[marcpreston]

cheers for the help

 

[marcpreston]

i have calculated the sliding and overturning factors. And it comes out at 1.63.