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The Government of Canada’s terminology and linguistic data bank.

frost jacking [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2008-09-17

English

Subject field(s)
  • Glaciology
DEF

Cumulative upward displacement of objects embedded in the ground, caused by frost action.

CONT

Frost jacking results from basal or vertical freezing pressures acting on the underside of a foundation, structure or object, or from adfreezing of soil to the sides of these objects. The cumulative upward movement over a period of time (one or several freeze-thaw cycles) may result in the foundation unit or object being ejected from the ground.

CONT

Frost-jacking - When heaving occurs ..., if a structure imbedded in the ground is not properly anchored to resist such movement, the structure will be forced upward along with the ground surface. In most cases, the structure does not return to its original position when the active layer thaws during the following summer. The net upward movement is called "jacking." This phenomenon can occur whenever there is seasonal freezing and thawing of the active layer, and is not limited to permafrost areas.

CONT

Fence posts and utility poles or towers are commonly affected, and both deep (pile) and shallow (post) foundations (e.g., used for bridges, wharves, unheated or lightweight buildings) have been seriously affected by frost jacking.

OBS

upfreezing: Synonym: (not recommended).

French

Domaine(s)
  • Glaciologie
OBS

éjection gélivale (frost jacking) : Le substantif éjection suppose un mouvement rapide, une expulsion, une projection, ce qui n'est pas le cas.

Spanish

Save record 1

Record 2 2000-03-31

English

Subject field(s)
  • Construction
  • Rough Carpentry

French

Domaine(s)
  • Construction
  • Charpenterie

Spanish

Save record 2

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