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Notre Dame High School Addition

Notre Dame High School Addition
Date: 2013

The Calgary Notre Dame High School needed to grow in order to accommodate its ever increasing population of students. A $7.6-million modernization project, including renovation and expansion works, increased the school’s capacity to 1550 students. General contractor Golden Triangle Construction Management chose AGRA Foundations Limited for the foundation works for the addition, which was to be built on an old reclaimed ravine with up to 9 m of fill. The School Board being on a fixed budget, casing costs had to be included for the 384 piles used for the works.

Solution:

To meet the tight schedule and provide the School Board with a lump sum contract for the works, the 384 piles were constructed as CFA piles, allowing for better cost control. The ground geology on site of up to 13 m of uncontrolled fill underlain by strong bedrock, loose and saturated in some places, required full casings for several piles. Two drill rigs were working simultaneously on site, each producing up to 15 piles daily. The piles installed measured 450 mm x 11 m and 900 mm x 22 m.