Expansive soil volume change predictions
Expansive soil volume change predictions
(OP)
Has a study on the accuracy of expansive soil volume change predicted by any or all of the many analysis methods been published? Also, if any of you care to, please provide your comments on the accuracy of the analysis methods you are familiar with. Thank you.





RE: Expansive soil volume change predictions
Frankly, most of my predictions are intended to bracket the problem - mostly to the high side. Yet the process still leaves me uneasy at times -
Please see FAQ731-376 for great suggestions on how to make the best use of Eng-Tips Fora. See FAQ158-922 for recommendations regarding the question, "How Do You Evaluate Fill Settlement Beneath Structures?"
RE: Expansive soil volume change predictions
I have not come across independent research papers on the volume change predictions only; much of the focus may perhaps be on the soil structure interaction whilst using these soils. Perhaps you could search papers on those terms and then extract the numbers that you are looking for in their preliminary investigation.
(e.g. Laboratory and field studies of response of structures to heave of expansive clay; Geotechnique Vol 48, No. 1, pp. 103-121).
Note: this is a very general topic and there may be lots of others.
Regards
RE: Expansive soil volume change predictions
RE: Expansive soil volume change predictions
1. Initial Void Ratio
2. Swelling Index
3. Corrected swelling pressure
All of these parameters can be obtained from a free swell or a constant volume oedometer/consolidation test.
The swell predictions outlined in Fredlund's text are very well researched and from my experience are very representative to field conditions. Hope this helps.
RE: Expansive soil volume change predictions
Please see FAQ731-376 for great suggestions on how to make the best use of Eng-Tips Fora. See FAQ158-922 for recommendations regarding the question, "How Do You Evaluate Fill Settlement Beneath Structures?"
RE: Expansive soil volume change predictions
RE: Expansive soil volume change predictions
Can anyone help me, I'm new to this site. I was wondering if there is a ASTM or other test for an disturbed soil for determining if a soil is expansive.
I'm from WV, and swelling clays are not normally a problem, but we have a situation here that has caused a "hump" in one of our roads. It's not that deep, but I would like to know for sure before we excavate.
Thanks,
RE: Expansive soil volume change predictions
Please see FAQ731-376 for great suggestions on how to make the best use of Eng-Tips Fora. See FAQ158-922 for recommendations regarding the question, "How Do You Evaluate Fill Settlement Beneath Structures?"