how to estimate swelling pressure
how to estimate swelling pressure
(OP)
I am dealing with expansive soils now.
If I only have testing results on natural moisture content, Atterberg Limits, and Clay fractions from disturbed soil samples collected from test pits, is there a way to figure out soil swelling pressure and amount of heave?
Any help will be appreciated.
If I only have testing results on natural moisture content, Atterberg Limits, and Clay fractions from disturbed soil samples collected from test pits, is there a way to figure out soil swelling pressure and amount of heave?
Any help will be appreciated.





RE: how to estimate swelling pressure
RE: how to estimate swelling pressure
RE: how to estimate swelling pressure
I would not want to guess that pressure to hang my license on. The soil could swell 0.1% to over 25%, it might not. If it does, you can get swell pressures that could range from 2,000 psf to 35,000 psf+.
You need an "undisturbed" sample to run tests on. This assumes it is the standard of practice for your area, if it is not, then you likely do not have a true expansive soil problem.
ASCE tried to put together a terrible publication for expansive soils. Having worked in VA, the standard practice was to run limits at 2.5 feet. In CO, I have drilled 35 to 45 feet for proper pier design.