PE Exam last minute Qs (NCEES geotechnical sample question need help)
PE Exam last minute Qs (NCEES geotechnical sample question need help)
(OP)
I posted this on a different forum, hoping to get more eyes here.
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 for sigma_a come from?
Please see picture URL for clarification.
http://imageupper.com/g/?S020001001F13822470112424...
Thank you very much for your help as it's driving me crazy to figure this out!
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 for sigma_a come from?
Please see picture URL for clarification.
http://imageupper.com/g/?S020001001F13822470112424...
Thank you very much for your help as it's driving me crazy to figure this out!





RE: PE Exam last minute Qs (NCEES geotechnical sample question need help)
529- That is from Peck's earth pressure envelope for Sandy soils when you have a strutted or braced retaining wall. See "Foundation Engineering" 2bd edition, 1974, by Peck, Hanson and Thornburn.
RE: PE Exam last minute Qs (NCEES geotechnical sample question need help)
@528: I examined the NCEES book again. No list of reference. Sometimes the solution to the problem itself list the reference. Occasionally, NCEES book throws in a problem with either obscure reference or appears like you said a manufacturer's design manual.
@529: Wow, "Foundation Engineering" is a mere $6 in paperback. First time I've come across it.