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Re: Retaining wall design pressures

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> What happens when you add one drop of water to the saturated
> soil? Does the pressure on the wall suddenly change or are the two
> conditions essentially the same?
> Robert

If the drop of water can remain at the place where it was dropped off
without any path for it to drain, then theoretically, pressure on the
wall, at the elevation corresponding to the water drop, will increase. 
At that one local point, conditions will be neither saturated nor
submerged.  In this purely hypothetical condition, the pressure will be