At a recent site redevelopment, the thin AC pavement and base course of a used car lot were stripped and grading begun for shallow foundation structures. The soil under the base course was lean clay (CL), medium stiff to stiff (I don't have the blow count), but with a high moisture content (14...
I have a site with a potential of 2-1/2 inches of liquefaction settlement and surface clays with high expansion potential. I've heard of a Rutherford-Chekene structural slab design using criteria of 2 inches and 4 inches of settlement.
A web search pulls up the firm, but no description of...
I'm having a debate in the office on whether the soil-drilled shaft side friction for uplift is mobilized before the uplift load is entirely resisted by the rock socket.
The major drilled shafts are a 72" with 610 kip uplift and a 54" with 475 kip uplift. The shafts go through 40 to 45 feet of...
It's standard practice here to not use a soil as backfill if its max dry density is below 98 pcf. The soil is usually an ML. LL and PI are not an issue but the ML is not used as backfill for footings, structural walls, or building pads backfill/fill.
My question is that no one has been able to...
Are there any guidelines for choosing a "lean" concrete design strength?
I have a project that calls for 125 ksf bearing pressure, on rock, and the use of 2000 psi "lean" concrete for backfill of undercut.
Why 2000 and not 1000, or 750psi concrete? Is it based on cost or is there a design...
Dear Structure friends,
We often get requests for geotech investigations for buildings that are not off the drawing board. Size, placement, and loads are usually not yet decided.
Are there rules of thumb that I can use to guesstimate column and wall loads, ie 1 story wood frame: columns 50...
I have a soil profile consisting of 3 ft of ML followed by SM to a depth of 20 ft. The SPT counts are:
Depth (ft) N (corrected)
1 16
3.5 15
6 9
8.5 10
13.5 6
18.5 5
The estimated settlement using Theory of Elasticity (Timoshenko &...
