e-mosty June 2018 American Bridges American Bridges | Page 58
The tower structural members are comprised of closed
circular hollow structural sections (HSS) 508mm in
diameter for the main tower legs and varying from 168
to 273mm in diameter for the diagonal members. The
tower design had to accommodate the counterweights,
the counterweight and span guides as well as the access
stairs.
The abutment and pier piles are closed ended and filled
with concrete for added stiffness.
At the piers, several pipe piles had to be driven open
ended to account for the stiffening of the soil within the
cofferdam from the pile driving operations. Access for
the piers construction was facilitated by the
construction of a temporary work bridge from shore.
The counterweights for the lift span were housed inside
the towers and are comprised of built-up steel boxes
filled with steel plates. The machine rooms are
accessible using stairs located within the towers. An
aerial view of one of the towers showing the machine
rooms is stunning and an attractive feature of this
bridge. The aesthetically pleasing bridge has become an iconic
structure and an architectural landmark for the town of
Placentia, an integral part of the local culture and an
important part of the region’s touristic hub, as a focal
point in the community attracting visitors and new
businesses to the area.
The abutment foundations are supported on30-324mm
diameter friction pipe piles driven about 16.5m into the
soils at the north abutment and 20m at the south
abutment. The use of steel enabled the designers to deliver a
project that surpassed the imposed design
requirements, providing the best sustain- able option
for optimal net positive effect on social, economic, and
environmental aspects.
CP RAIL BRIDGE AT OUTREMONT AVENUE WITHIN THE UNIVERSITY OF
MONTREAL CAMPUS
Project Team
Fabricator: Central Welding & Iron Works
Engineer: Les Consultants SMi
Detailer: Genifab
Contractor: Roxboro Excavation
The city wanted to implement an Architectural element
and distinctive effort to obtain an unparalleled result.
In 2013, the University of Montréal, a major university
in the metropolitan area, started construction of its new
campus, the MIL Campus, in Outremont, on the
abandoned grounds of a former Canadian Pacific yard.
However, before it could proceed with the work, it was
necessary to open the site and move, from south to
north, a double track of the old railway network.
2/2018
This initiative required precision in many aspects,
including from quality and from the point of view of
work that would be accompanied by a lighting
component.
These target points were to eventually take a simple
and conventional railway bridge and turn it into a
beautiful bridge project of uniqueness and grace that
everyone would appreciate.