Construction of 8 semi-detached villas
Montréal, QC -
Within the development of Challenger / Saint-Laurent area in Montréal, Québec, Rodimax proceeded with the construction of a total of 8 villas. Each villa has about 3400 feet of living space on four floors, plus a double garage in the basement. Menard Canada was to improve the soil under the raft slab and isolated/spread footings for the 8 villas located at Vittorio-Fioricci Street.
The proposed solution was to install dense semi-rigid elements, Controlled Modulus Columns (CMC) through the thickness of existing Fill (from 2.5 to 8.5m locally) down to the sandy Silt. 320mm diameter CMC were implemented on a square grid beneath the raft slab. As foundations of 4 villas were to be poured after winter, air-entrained concrete and steel reinforcement were used to ensure the CMCs' resistance against frost effects. A total of 608 CMC were installed down to a depth of 3 to 9m from the working platform level. The 8 CMC dynamic testing implemented on site showed settlement below allowable 25mm specification. Available static resistance was at least twice the future service load.