Construction of the elevated structure ar the Airport junction
Nature of the work
The foundations of the elevated structure, including the caissons, columns and pierheads, have now been completed in certain sectors, so construction of the deck of the REM’s elevated structure can now begin using launching gantries.
Prefabricated segments will be assembled one after the other to form the deck on which the REM’s rail cars will run.
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And to ensure the transition between the elevated structure and the ground-level route, construction of reinforced earth walls will be initiated. These transition ramps will be built using reinforced earth to support the slope fill and the weight of the railway infrastructure. The ramp will be located near the Highway 13 junction.
- Summer to fall 2019: Construction of the elevated structure (installation of segmented beams)
- Summer to fall 2019: Construction of reinforced earth walls
- Summer 2020 to fall 2020: Installation of rails
*The current sequence is subject to change without notice.
Impacts and mitigation measures
Road traffic is permitted beneath the equipment thanks to engineer certification that the prefabricated segments are securely anchored. Nonetheless, full and partial closures will be implemented when the prefabricated segments are delivered, raised and assembled.
Just as for any construction site, the work will generate noise, vibrations, dust, heavy truck traffic and traffic disruptions. Mitigation measures will be implemented to prevent or minimize the impact on surrounding residents and ensure everyone’s safety.
The REM’s elevated structure on the West Island allows for construction of a linear route, limiting the footprint and the impact of the construction work.
Column height varies depending on a column’s location on the route. There will be a minimum clearance of 5.3 metres (Ministère des Transports standard) below the deck to ensure passage of vehicles.
The following diagram shows the profile of the elevated structure (for information purposes only):
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