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Horizon Business Park Buildings B and D

Horizon Business Park Buildings B and D
Date: 2014

The proximity to the oil sands has been a major factor in the rapid development of Edmonton. Growing and emerging businesses present an increasing demand for warehouse distribution centres. Conveniently located by the CN Intermodal yard and with access to the Yellowhead Trail and the Anthony Henday Drive - two of Edmonton’s major traffic arteries - the Horizon Business Park seeks to accommodate the boom with five new buildings. General contractor Hopewell Development Construction Inc. selected AGRA Foundations Limited for the foundation works to buildings B and D. The soils in the northwest quadrant of Edmonton typically present a succession of clay and sand layers above clay till starting in depths of 12 to 24 m. The interwoven sand layers present perched water levels and sloughing conditions.

Solution:

Considering the geotechnical setting of heterogenic soils with sloughing sand layers, the AGRA team proposed CFA piling as the most efficient and economical solution for the project. A more traditional approach, cast-in-place piles, would have required the use of a temporary casing, lowering the production rate and thereby increasing costs. Further, it wasn’t possible to quantify the number of cast-in-place piles that would require casing and the depths required at the tender stage, bringing a high degree of uncertainty about the final project cost. CFA piling proved to be a faster and far more predictable option, allowing for a lump-sum design build solution.