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Re: Soil Bearing Pressure

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Sounds like you're thinking of soil as a perfect liquid.  If it behaved as a
liquid, I'd agree with you.  But it doesn't.

Using your Rule of Thumb, what would be the bearing capacity of a footing
setting on grade?

John P. Riley, SE
Riley Engineering
Blue Grass, Iowa
-------------------------------------
> Old "Rule of Thumb":
>
> The soil pressure that you can use has to be equal to or less than the
weight
> of the soil removed.  After all, wasn't the soil at that level supporting
> the weight of the soil above it before you removed it?
>
> A. Roger Turk, P.E.(Structural)
> Tucson, Arizona
>
> Paul Reilly wrote:
>
> =-=-=-=-=-=-=-==-=-=-=-=-=-=-=----===-=-
> > Ref Table 18-I-A, Allowable Soil Bearing Pressure, footnote 2...
> "increase
> > of 20% per each foot of embedment into natural grade greater than 1
> foot".
> > Is this provision for soil bearing applicable to sub-structures and
> > basement footings
>
>
> Overburden and skin friction were considered as candidates for the
> increase, however, I was almost resolved to attribute the allowable
bearing
> increase to the probability of reduced deliterious materials insitu.  Any
> geotechs out there?
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
>
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