Champlain Bridge Advances - page 4 of 5
The journey of a footing
Each footing requires a form, with a rebar cage and post-tension loops installed in it, in preparation for the concreting operations, which last five or six hours.
The special transporters arriving in Canada ready for deployment.
Once the concrete is poured, the footing rests for three days in its form, to give the concrete time to cure.
The footing is then removed from the form and moved to the second position in the production chain, using a super transporter, which can lift parts weighing up to 1000 tons.
The next step is to add a pier base, which is cast in place at an angle above the footing.
At the third and last station, the operation is finished with the installation of a work platform and the accessories required for the subsequent installation operations in the river.
The finished unit will be about 14 metres tall and will be moved to the loading dock at the end of the west jetty.
As a last step, an industrial catamaran, specially designed for this purpose, will carry the unit to its place at the bottom of the river. Marine excavation work has been underway to prepare for this critical step, which will begin sometime in May.
Work on the cable-stayed portion of the bridge
After having finished the installation of rebars within the formwork of the footings, the main pylon’s south footing was concreted on Saturday, April 9.
The concreting will continue with the north side footing. Teams will be hard at work very early in the morning to coordinate all the cement mixers crossing back and forth over the ice boom (Estacade) to get to the cable-stayed jetty.
In total, about 150 trucks will be carrying close to 950 cubic metres of concrete put in place using America concrete booms.