NCEES Geotechnical ultimate pullout resistance & Peck earth pressure diagram

[icreep]

Questions regarding book "PE Civil: Geotechnical Sample Questions and Solutions" (April 2013 2nd printing)

Question 528. What is the source for the formula used in the solution, P = 2*L*sigma_v*C_i*tan(phi)?

Question 529. Where did the equation sigma_a come from?

Please see picture URL for clarification.

http://imageupper.com/g/?S020001001F13822470112424190

Thank you for your help.

 

[ketanco]

i just answered this in the duplicate thread you published

 

[icreep]

I clicked post twice when the page didn't load. Don't know how to delete it.