Construction Update
Week of November 21
Construction of the LRT stations continues to ramp up; at Bayview Station, final grade beams are installed this week to allow for work on the foundation walls to begin. In Lyon Station, architectural works are ongoing and include forming mechanical room walls and installing dowels in the stairs. At Blair Station, the easternmost station of the alignment, masonry is underway on the bus operators’ building.
West Stations
Tunney’s Pasture Station: Crews continue drilling caissons in preparation for the next phase of station construction.
Bayview Station: Initial station construction is ongoing and includes underground electrical and mechanical work, final grade beam installations, and ground improvement during the daytime and overnight.
Pimisi Station: Station construction continues to advance with crews forming and pouring the lower concourse walls, installing duct banks, and mechanical and electrical work.
Lyon Station cavern: Crews continue architectural work in the station, including installing rebar and formwork for the elevator mechanical room, and dowels for the stairs and sub platform. Final shotcrete activities occur in the west transition.
Lyon Station west entrance: Crews install rebar, pour concrete at the mid-landing and for the ground floor slabs, construct walls and pillars and continue electrical work for the entrance. At the east vent shaft, rock removals are being completed and waterproofing activities begin by the end of the week.
Lyon Station east entrance: Crews continue forming, pouring, curing and stripping sections of concrete for the ground floor beams, walls and slabs, in addition to electrical work. Hoe ramming and rocks removals are ongoing at the east vent shaft for the next weeks.
Parliament Station cavern: Activities progress in the station with crews pouring the last sections of L-walls, first sections of footings and the invert pre-slab. Waterproofing of the station arch and tunnel arch is ongoing in anticipation of upcoming concrete pours.
Parliament Station west entrance: Work on the roof of the station’s head house wraps up this week; crews prepare for the next phase of activities including glazing. At the east vent shaft, final rock bolt installation takes place to allow for a breakthrough connection to the underground station.
Parliament Station east entrance: With blasting being completed, crews finalize soft ground excavation outside at the entrance, followed by saw cutting at the concourse level by end of the week. Crews also mobilize to begin the next phase of roofing activities and glazing.
Traffic restrictions on Queen and O’Connor streets remain in effect. Queen Street is now open to two-way traffic between Lyon Street and Elgin Street.
Rideau Station cavern: The station continues to take shape; activities include constructing walls and slabs, installing rebar, pouring concrete and waterproofing the arch in sections.
Rideau Station west entrance: This week, activities at the entrance include removals of the Rideau Centre’s foundation panels to allow for the next phase of integrated entrance construction to occur. The next phase of umbrella installation is ongoing and includes the installation of a crane. Crews continue shoring at the HVAC shaft; a sidewalk realignment will be ongoing during this work.
Rideau Station east entrance: The station and elevator walls continue to take shape with crews forming, installing rebar and pouring concrete this week. The tunnel vent shaft walls also begin to be formed to allow for concrete pours to occur. Crews mobilize to begin shoring at the west vent shaft.
Rideau Street is closed 24/7 to vehicular traffic to permit works to advance, including jet grouting activities.
uOttawa Station: Work advances at the station; crews install rebar, form and pour concrete for the platform suspended slab and continue mechanical and electrical rough-ins.
East Portal: Crews continue activities at the ramp, including drilling tiebacks and waterproofing for upcoming concrete pours.
East Stations
Lees Station: Crews begin micro-piling to allow for the next phase of station construction, in addition to working on the watermain protection and installing rebar for the elevator pit.
Hurdman Station: Station construction progresses as crews begin installing structural steel at the station and working on the roof of the ancillary building. Concrete work for the station walls and stairs also occurs and finishing work is ongoing at the bus operators’ building.
Tremblay Station: Crews complete framing and start waterproofing the roof this week. Other station construction activities include masonry and underground mechanical and electrical work.
St-Laurent Station: The station continues to take shape; work includes the installation of platform steel, ongoing work on the plenum and final installation of the ceiling hangers.
Cyrville Station: This week, station construction includes glazing, framing, interior construction of the auxiliary building as well as ongoing mechanical and electrical work.
Blair Station: Construction continues to advance at the station and includes exterior wall and soffit panels installations, mechanical and electrical work and framing. Crews install masonry at the bus operators’ building.
Tunnel Excavation and Support
Crews install the umbrella, part of reinforcements, in the last section of running tunnel west of Rideau Station.
Guideway
Tunney’s Pasture Station to West Portal: Construction of the guideway is ongoing and includes pouring the fixation track slab east of Tunney’s Pasture Station moving east, working on the overlay, installing Overhead Catenary System foundations and building the retaining wall. Crews are also installing fencing and continuing initial landscaping activities west of Bayview Station.
Mann Avenue Bridge to west of Tremblay Station: Crews install Overhead Catenary System foundations just east of Mann Avenue Bridge, work on the drainage system on the elevated guideway, continue electrical work along this section of guideway and pull rail in sections from the Rideau River Bridge to Lees Station. Tamping activities also begin this week just west of Tremblay Station.
Other Activities
Mann Avenue Bridge: Bridge reconstruction continues through spring 2017. This week, activities include construction of the parapet walls and ongoing concrete deck pours.
Upcoming Construction Activities
In the coming weeks, the following construction activities are scheduled to occur:
- Ongoing removal of the overhead scaffolding at Bayview Bridge requiring intermittent sidewalk closures.
- Lyon Station HVAC and west vent shaft work resumes.
- Structural steel installation at uOttawa Station.
- Installation of traction power sub stations on the guideway west of Lees Station and just east of Hurdman Station.
- Fencing installation on guideway just west of Tremblay Station.
- Vehicle testing and Overhead Catenary System will be energized in phases along the guideway between Belfast Yard and Blair Station.
- Installation of porcelain panels at Blair stations.
Construction of a support system (umbrella)
Did you know that a support structure called an umbrella (or horizontal piling) will be put in place during the construction of Rideau Station west entrance construction?
The umbrella will reinforce and support excavation and construction of the integrated entrance. The umbrella will be built from horizontal piling/reinforced steel pipes. Horizontal piling consists of drilling holes, inserting steel pipes and then grouting the pipes in place with concrete. This is done to support the entrance opening.
Check out this
cool video that provides a glimpse of crews installing an umbrella.
http://www.ligneconfederationline.ca/construction/construction-update-100/