Shallow Foundation Failure Surface
Shallow Foundation Failure Surface
(OP)
I have heard a number of rules of thumb for estimating the depth to the bottom of a general shear failure surface. Anwhere for 2B to 4B for cohesionless soils, and around B for cohesive soils.
I can't seem to find any document that talks about this. Could somone point me in the right direction? Thanks.
I can't seem to find any document that talks about this. Could somone point me in the right direction? Thanks.





RE: Shallow Foundation Failure Surface
RE: Shallow Foundation Failure Surface
RE: Shallow Foundation Failure Surface
If there is rotation of the foundation or an eccentric failure, it gets increasingly more difficult to define the failure surface. If it just dropped straight down with no side bulges, it is likely a punching shear failure.
RE: Shallow Foundation Failure Surface
Rey Villa
http://geotech-apps.com
RE: Shallow Foundation Failure Surface
In bowles there is a relationship for the influence depth of the wedge, but it says nothing about the spirals. That's less than 1B and is in function of friction angle
These are the ones I know there might be others though
RE: Shallow Foundation Failure Surface
Have a look at book "Principles of Geotechnical Engineering" by Braja M. Das. There is a section near the end of the book which deals with this.
Joe.
RE: Shallow Foundation Failure Surface
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com