Confederation Bridge, Bridge Foundations

Straits Crossing JV
Caisson Foundations

Confederation Bridge is 13km long and links Prince Edward Island to mainland Canada. The bridge was formed from precast elements including 64 pairs of pier bases and shafts plus cantilever and infill beams. All precast elements were lifted into place by floating crane.

Initial ‘hard pad’ foundations were installed onto a weak mud stone rockhead in water depths up to 33m by an Installation Frame. It carried three precast pads with condensed fabric forms and was levelled by three hydraulic rams. The Installation Frame was fully automated for levelling, grout filling, vent monitoring and removal. Divers were only required to undertake monitoring duties.