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Uplift Pressures due to Frozen Soil

Uplift Pressures due to Frozen Soil

Uplift Pressures due to Frozen Soil

(OP)
Does anyone know how much uplift pressure frozen soils typically exhibit?  Is there a way to calculate this for a homogenous and an anisotropic soil profile?

I imagine it depends on the type of soil, moisture content, and depth of frost penetration.

Thanks

RE: Uplift Pressures due to Frozen Soil

The answer is, "Lots". Or, too much to reasonable design for. Research the topic "Segregation Potential". Within discussion of this topic is the idea of a critical confining pressure that overcomes crystallization and continuing water migration and hence the building of ice lenses.  

RE: Uplift Pressures due to Frozen Soil

To get an idea of what it takes, compute the pressure under an ice skate runner.  I guess at 200 plus psi, or 15 tons per sq. ft.

RE: Uplift Pressures due to Frozen Soil

The adfreeze value used in the Alaska permafrost is limited to the top 3 feet of soil, a uplift based on surface area is modeled at 10 psi for pile piles.

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