Equivalent Fluid Pressure
Equivalent Fluid Pressure
(OP)
I am reviewing a geotechnical report for a cantilever retaining wall recommendation for a land job. The consultant recommends equivalent fluid pressures in conditions like "Above Water Table" and "Below Water Table". Since drainage like sump is always installed to prevent water accumulation, why does it go to the "Below Water Table"?





RE: Equivalent Fluid Pressure
f-d
¡papá gordo ain’t no madre flaca!
RE: Equivalent Fluid Pressure
www.PeirceEngineering.com
RE: Equivalent Fluid Pressure
1. Lean Clays, 51 pcf (above) and 25 pcf (below)
2. Clayey Sands, 42 pcf (above) and 21 pcf (below).
So if there's water accumulated behind the wall, then I will use 25+62.4=87.4 pcf. correct me if I am wrong with the numbers. Thanks.
RE: Equivalent Fluid Pressure
RE: Equivalent Fluid Pressure
RE: Equivalent Fluid Pressure
www.PeirceEngineering.com
RE: Equivalent Fluid Pressure
That said, I am in the middle of an update to the CRSI Design Handbook chapter 14 on cantilever retaining walls. If you have specific issues, I would really like to hear about them now (before the new edition is published), so we can be as useful as possible.
John Turner CSP PE
CRSI Greater Southwestern Regional Manager
RE: Equivalent Fluid Pressure
I used to teach with a book that did, but I quit both book and equivalent fluid pressures; I found it confusing and my students did also. So it's back to DM 7...
http://www.pz27.net