I have seen it mentioned in some reports that when designing pole foundations, you cannot rely on the soil within frost depth to resist lateral bearing (any resisting earth pressure within frost depth must be discounted). This causes all pole/sign foundations to be quite deep since the moment...
Example: I have a cantilever retaining wall in soil (like in the attached photo), and I am looking to check the soil bearing pressure. I know the net ultimate bearing capacity of the soil and I also know that by the definition of net bearing pressure, only the additional weight is considered...
