Drilled shafts are deep foundation elements that are high capacity and cast-in-place.
- Support structures
- Provide earth retention
Drilled shafts (also referred to as caissons) are constructed by first drilling a hole with the design diameter to the design depth. If the hole cannot remain open on its own (due to sloughing or caving soils and/or ground water), drilling fluid or casing is used to help. After drilling is complete, a reinforcing steel cage is lowered into the hole and filled with concrete. Under certain conditions, the base of a drilled pile can be enlarged to form a bell and provide increased area for end bearing.
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Colonsay - Canadian Wheat Board Terminal
Canadian Wheat Board