Frost Heaving


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frost heaving

[′frȯst ‚hēv·iŋ]
(geology)
The lifting and distortion of a surface due to internal action of frost resulting from subsurface ice formation; affects soil, rock, pavement, and other structures.

Frost Heaving

 

increase in the volume of freezing moist soils and loose rocks as a result of the crystallization of water (which forms ice interlayers, lenses, and the like) and the decompaction of mineral particles. It is observed in areas where there is seasonally and permanently frozen ground. Frost heaving is caused by the uneven lifting of the freezing layers. The reason for the differences in magnitude of lifting is differences in conditions of freezing, the composition of the rocks, the moisture, density, and so on. Clayey rocks are most subject to frost heaving because frost heaving depends not only on the moisture of the rocks but also on migrational moisture entering the freezing ground from adjacent unfrozen zones. The stresses that arise in the ground during frost heaving may cause breaks in the root systems of plants, deformation and shifting of structures, and the like. The unfavorable consequences of frost heaving are prevented by land reclamation, treating the ground with substances that change its physicochemical properties, and using special building structures.

REFERENCES

Osnovy geokriologii (merzlotovedeniia), part 2. Moscow, 1959.
Orlov, V. O. Kriogennoe puchenie tonkodispersnykh gruntov. Moscow, 1962.
Bor’ba s puchinami na zheleznykh i avtomobiVnykh dorogakh. Moscow, 1965.
Kiselev, M. F. Meropriiatiia protiv deformatsii zdanii i sooruzhenii ot deistviia sil moroznogo vypuchivaniia fundamentov. Moscow, 1971.

V. O. ORLOV

References in periodicals archive ?
How will they monitor frost heaving and what will they do if they find problems?
Although HDPE has only been in use for a few years in this region, the study indicates a clear preference for polyethylene with respect to ice removal and frost heaving.
Frost heaving occurs when the water in the soil freezes and expands.
To prevent frost heaving, footing holes should have sides that are vertical.
Mulching to prevent frost heaving should be done after cold weather has come.
But the rest of us would live in topsy-turvy neighborhoods if builders didn't design homes to prevent frost heaving in the first place.
Provide a solid foundation (the organic matter would have to be removed and a good bed of tamped gravel [at least 24 inches] would have to be added to prevent frost heaving of the foundation).
If the pad does fall victim to frost heaving, it'll crack along these lines in a controlled and harmless way.
If you have gravel, frost heaving won't be a problem.
Up north you may need deeper footing, because of frost heaving.