Height of Surcharge

[BLUEPUPIL]

Cantilever Retaining Wall
Weight of Soil=18 kN/m3
Surcharge=36 kN/m2
Height of Surcharge=36/18=2м
Write or Wrong?
If Wrong, please explain why?

 

[r13]

Surcharge can be from many sources - traffic, stockpile ... But it is fine (not right or wrong) if you like to think this way, as the surcharge is treated as uniform load on the ground under consideration.

 

[BridgeSmith]

For standard highway traffic loads in the US, the surcharge is an equivalent depth of soil that varies between 2 and 4 feet, depending on the height of the wall (4' of soil for walls up to 5' in height; 3' soil for 10' high wall, etc.). In English units, for a10' high wall, it's 3' * soil density (typically about 120pcf) * ka (for active soil pressure conditions, or ko for at rest conditions).

Rod Smith, P.E., The artist formerly known as HotRod10

 

[r13]

Didn't think about that, your surcharge is quite high, compared to the more usual range from 200 psf to 500 psf.