Psudostatic slope stability analyses on bedding planes

[skopek]

Southern California grading codes often indicate that pseudostatic slope stability analyses need not to be performed on bedding sloping less than 12 degrees
e.g.,

http://www.codepublishing.com/ca/poway/Poway16/poway1650.html

see paragraph 16.50.0600 (but you will find it for ather jurisdiction, e.g., Orange County, Temecula, Los Angeles). Does anyone know what is the basis of such instruction; is there a published reference about this?

 

[GeoPaveTraffic]

I have not heard of this, but then again I don't work in California. Since 12 degrees is about a 4.7H:1V slope, I expect that someone determined that the likelihood have having a slope stability problem as such a flat slope was very low and therefore, they were not going to require an analysis to prove it. That said any slope can cause a problem with the right (or wrong) soils.