SOIL BEARING FOOTING PRESSURES

• Oct 31, 2003

• #2

Focht3

Geotechnical

Aug 23, 2002

1,840

US

What are you doing with them?



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• Oct 31, 2003

• Thread starter
• #3

cap4000

Civil/Environmental

Sep 21, 2003

555

US

In response to the Focht3 question. I am trying to figure lateral pressures from spread and column footings against existing foundation walls at varying depths.

 

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• Oct 31, 2003

• #4

Focht3

Geotechnical

Aug 23, 2002

1,840

US

Then use Boussinesq or Westergaard - the 2:1 distribution is for estimating vertical pressures only. Poulos and Davis' book includes solved equations, as well as charts, for evaluating the lateral pressures.

By the way, were the pressures you calculated using the 2:1 approach about twice as high as those from Boussinesq?



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• Oct 31, 2003

• #5

BigH

Geotechnical

Dec 1, 2002

6,012

TJ

Poulos and Davis is a great reference (Elastic Solutions for Soil and Rock) and should be in everyone's library. Newmark has a lateral load chart you can use. I'll have to confirm, but for surcharge loadings on non-yielding walls (footing near the wall but founded "high up&quot which you might have, the lateral pressures are, I believe, to be doubled. I'll try to confirm this.

 

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