Settlement of Clayey Structural Fill vs. Undisturbed Soil
Settlement of Clayey Structural Fill vs. Undisturbed Soil
(OP)
I am doing a settlement analysis for a foundation being built on some old structural fill. The lower portion of the soil profile is glacial till silty clay that is probably A-6b soil. The original soils are over-conslidated and have an OCR of about 5 to 6. The upper portion of the soil profile is the same material obtained from a deep excavation elsewhere on the site. At the time of placement it was placed as structural fill and tested. I normally would not be concerned about the settlement of these materials for the loads we have, however, a portion of our building is on deep crushed stone structural fill and I need to calculate the settlement of the portion on the clay fill/clay side versus the crushed stone side. Does anyone have a feel for what the recompression ratio of the clay fill would be relative to the original clay soil? I would think it is somewhat higher, but I'm not sure how to quantify it.
Thanks!
Thanks!





RE: Settlement of Clayey Structural Fill vs. Undisturbed Soil
On an unrelated note, I don't use the term silty clay, 'cause it's not defined by ASTM D2488 and very rare in D2487. It's widely used in our vernacular, but not very precise (to me at least). When I see it used by our consultants, I require supporting laboratory testing, as our consultants are contracted to use D2488 or D2487. Pet peeve rant now over. . .
f-d
ípapß gordo ainÆt no madre flaca!
RE: Settlement of Clayey Structural Fill vs. Undisturbed Soil
RE: Settlement of Clayey Structural Fill vs. Undisturbed Soil
An alternative might be in-situ testing such as cone penetrometer or dilatometer.
RE: Settlement of Clayey Structural Fill vs. Undisturbed Soil
RE: Settlement of Clayey Structural Fill vs. Undisturbed Soil