Which soils are most susceptible to frost heaving?
Which soils are most susceptible to frost heaving?
(OP)
I have native silty clay with a liquid limit ranging from 55 to 73, and plastic limits of 26 to 29. The consistency of the clay ranged from firm to very stiff with SPT "N" values ranging from 7 to 16. I am curious if this clay will heave on shallow footings. What soil properties are important when determining whether or not it is susceptible to heaving? Thanks in advance.
Clansman
If a builder has built a house for a man and has not made his work sound, and the house which he has built has fallen down and so caused the death of the householder, that builder shall be put to death." Code of Hammurabi, c.2040 B.C.





RE: Which soils are most susceptible to frost heaving?
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RE: Which soils are most susceptible to frost heaving?
RE: Which soils are most susceptible to frost heaving?
Mike McCann
MMC Engineering
RE: Which soils are most susceptible to frost heaving?
However there is still some potential for frost heave, especially of there are variations in the soil. As mentioned in the other thread, would be best to insulate footings having inadequate cover(side of wall below grade and laterally over footing) to maintain soils thawed under footing. In Anchorage Alaska the design frost depth is 10 feet, but the standard foundation design (for heated buildings) is to provided 42" of soil cover, and 2" insulation on the foundation wall. It works.
RE: Which soils are most susceptible to frost heaving?
Water has been found in highly plastic clays in a supercooled state at -40degrees... the clay is too tight for the water to change phase to ice.
Dik
RE: Which soils are most susceptible to frost heaving?
Dik
RE: Which soils are most susceptible to frost heaving?