Rockery wall 11 feet tall
Rockery wall 11 feet tall
(OP)
The backfill is 2:1 minimum may be larger. Can no surcharge be used in the calculations? Also reviewing lateral active pressure and engineer used F=0.5 We Ka H^2 (Cos g-f) g=deg. wall friction assumed 22, f=degrees anale of native soil cut slope 9.5degrees assumed
it reduces lateral force by half
it reduces lateral force by half






RE: Rockery wall 11 feet tall
the 0.5 is to take the area of the backfill force. The force is triangular of depth H, and the leg is K*We*H...
So area is 0.5*H*H*We*K.
There is NO reduction in the force.
there are K_active, K_passive, and K_not. and Ko is the cos(g-f)... Ko is used as stricter than Ka since Ka requires movement to enable (to some degree)
RE: Rockery wall 11 feet tall
RE: Rockery wall 11 feet tall
http://www.nbmg.unr.edu/nesc/rockerywall.pdf
http://www.clarkcountynv.gov/Depts/development_ser...
http://www.ci.brier.wa.us/Acrobat_Forms/Building/R...
http://www.wsdot.wa.gov/publications/manuals/fullt...
http://cwa.mesquitenv.gov/SiteObjects/published/3E...
RE: Rockery wall 11 feet tall
RE: Rockery wall 11 feet tall
RE: Rockery wall 11 feet tall
RE: Rockery wall 11 feet tall
RE: Rockery wall 11 feet tall
Also there is a FHWA Rockery Design guide I believe, Archie may have referenced it.
EIT
www.HowToEngineer.com
RE: Rockery wall 11 feet tall
http://www.cflhd.gov/programs/techDevelopment/geot...
I have another one - a good one but don't have the url noted.
RE: Rockery wall 11 feet tall
Personally, I would expect the lateral pressure to increase at least 30% for a back slope of that magnitude. Some Geotechs use a minimum active pressure with a surcharge, others just use a higher active to mimic the slope effect. Seen it both ways.
Mike McCann
MMC Engineering
RE: Rockery wall 11 feet tall
http://www.soilstructure.com/