## Strip Foundation Loading on Catilever Wall Coulomb

## Strip Foundation Loading on Catilever Wall Coulomb

(OP)

Hi all,

New here and am wondering if someone can help me.

I am doing a comparison between Rankine and Coulomb theory for a retaining wall. I used a strip foundation a distance from the edge of the wall. I was able to do the analysis for Rankine but am having problems modelling the stress distribution of the foundation on Coulomb analysis.

Can anyone point me in the right direction?

Regards and thanks

John

New here and am wondering if someone can help me.

I am doing a comparison between Rankine and Coulomb theory for a retaining wall. I used a strip foundation a distance from the edge of the wall. I was able to do the analysis for Rankine but am having problems modelling the stress distribution of the foundation on Coulomb analysis.

Can anyone point me in the right direction?

Regards and thanks

John

## RE: Strip Foundation Loading on Catilever Wall Coulomb

Well use that AND the earth pressure too.

f-d

¡papá gordo ain't no madre flaca!

## RE: Strip Foundation Loading on Catilever Wall Coulomb

## RE: Strip Foundation Loading on Catilever Wall Coulomb

Many thanks for your help!

It is much appreciated. I actually used what you uploaded FixedEarth, found it before you uploaded!

Great help

John

## RE: Strip Foundation Loading on Catilever Wall Coulomb

## RE: Strip Foundation Loading on Catilever Wall Coulomb

I have one problem, in that I cant seem to integrate this into coulombs theory. Im trying to do a comparison between coulomb and rankine, showing how coulomb will give a slightly higher load, in that it takes into account wall friction.

For these lateral forces, do I compute them like Rankines, i.e. the area of the force and multiply by where it acts.

Coulomb theory then gives me the wedge resultant and I also work out where it acts. then Balance the passive and active to find the maximum force on the strip load.

Does this make sense?! Sorry I have done the Rankine aspect, it integrated with the surcharges easier, I just cant get the coulomb to work!

John

## RE: Strip Foundation Loading on Catilever Wall Coulomb

## RE: Strip Foundation Loading on Catilever Wall Coulomb

Rankine was straighforward enough as you get a horizontal thrust. you then compute the areas and work out the lever. However coulomb gives me the area (i think) from its equation. So is it possible to just summate them? i.e. youre not really taking the combined effect into account

Sorry, but I cant for the life of me get this to give me a reasonable answer. Id expect it to give me a slightly higher answer than rankine, as it takes the wall friction into account, but im getting considerably lower, which does not make sense!

Thanks!

J