Foundation Design for Picnic Shelter on organic silt?
Foundation Design for Picnic Shelter on organic silt?
(OP)
I am charged with designing the foundation for a 320 square foot picnic shelter with 4 to 6 structural columns on a slab-on-grade floor. Unfortunately, we completed two soil borings on site last week and the borings show organic silt the entire depth of the borings, to 35 feet. Blow counts range from weight of hammer to 1, with water at about 2 feet below grade. I was thinking of screw piles below each column, but without knowing how deep the bearing soils are, this seems a bit risky. I guess the other option would be a structural floating slab. Any other ideas? Thanks.





RE: Foundation Design for Picnic Shelter on organic silt?
RE: Foundation Design for Picnic Shelter on organic silt?
RE: Foundation Design for Picnic Shelter on organic silt?
RE: Foundation Design for Picnic Shelter on organic silt?
RE: Foundation Design for Picnic Shelter on organic silt?
Try to avoid any grade raising as that, not the structure, will cause you grief.
If you can, remove say 3 or 4 feet from the site and beyond about 5 ft., backfill with compacted granular material as a means to help spireas out uneven loading from the slab. Also, that minimizes problems from frost heave.
RE: Foundation Design for Picnic Shelter on organic silt?
RE: Foundation Design for Picnic Shelter on organic silt?
Dik
RE: Foundation Design for Picnic Shelter on organic silt?
RE: Foundation Design for Picnic Shelter on organic silt?
RE: Foundation Design for Picnic Shelter on organic silt?
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Foundation Design for Picnic Shelter on organic silt?
http://pinfoundations.com/boardwalks.htm
Looks like they have experience with wetlands.