This document provides information on upcoming tunnel construction works for the Eglinton Crosstown LRT project in Toronto, including the construction of jet grout headwalls at Chaplin station. Key details include: - Jet grout headwalls will be installed at Chaplin station to support future excavation of the station box using a temporary grout plant located on Gilgorm Avenue over 8-10 months. - Tunnel boring machine 1 has passed through the west headwall at Keele Street, and tunnel boring machine 2 is following closely behind. - The grout plant and headwall construction will impact traffic flow on Chaplin Avenue and temporarily close lanes.

1. Chaplin Grout Plant and
Headwall Construction
Spring 2014
Councillor Stintz Briefing
February 3, 2014
Jamie Robinson
Director, Communications and Community Relations
Toronto Expansion Projects, Metrolinx
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2. Eglinton Crosstown LRT
 Project
 $4.9 B (2010$), funded by the Province of Ontario
 19 kilometres east-west LRT from Kennedy to
Jane/Black Creek, including 10 kilometers of tunnel
 Connections to Yonge-University-Spadina Subway,
Scarborough RT and GO Stouffville
 Up to 26 stations
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3. Tunnelling Works 2014
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4. Tunnelling Update
 TBM 1 is well underway with tunnelling; just recently bored
through our west headwall at Keele St.
 TBM 2, a twin machine, has been assembled and is
following closely behind
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5. Tunnel Drive Sequence
1. Construct
Tunnel Launch
Shaft
2. Construct
Extraction Shaft
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6. Tunnel Drive Sequence
Commence Mining
Twin Tunnels
Install Jet Grout
Block “Headwalls”
from Surface
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7. Tunnel Drive Sequence
Mine-Through Jet
Grout Blocks
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8. Tunnel Drive Sequence
After Tunnel Contract:
• Install Station
Sidewall and
Headwall Support of
Excavation
• Excavate Station and
Commence
Removing Concrete
Tunnel Liners
Finally:
• Station Box Fully
Excavated & Tunnel
Lining Removed (Not
shown)
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9. Launch Shaft Tunnel Boring Machine
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10. Tunnel Drive Works 2013
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11. Tunnel Drive Works Current Status
 In 2013 the majority of tunnel works took place between
Black Creek Drive and the vicinity of Allen Road
 In 2014 work continues east of Allen Road
 Crews are starting the construction of headwalls and utility
relocation at future station sites along Eglinton Avenue
West
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12. Tunnel Drive Works
 Headwalls: Temporary support walls for future excavation
of the LRT stations.
 Made of concrete and installed to the depth of the future
track level
 Two methods of installation used: Secant Pile Walls, Jet
Grout
 Machinery including drill rigs, grout tanks, diggers and other
equipment
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13. Tunnel Drive Works
Secant pile wall : formed by
intersecting concrete piles
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Jet grout wall : uses engineered
grout to form wall in situ

14. Jet Grout Headwalls
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16. Grout Plant for Headwall Construction
Why a grout plant at Chaplin?
 Headwalls for Chaplin required
 Gilgorm adjacent to work site
 Gilgorm to remain open one lane northbound
 Allows efficient use of space
 Other options examined included Vesta Drive and Eglinton
 Gilgorm preferred because of:
reduced property impact
reduced footprint on Eglinton Ave.
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17. Grout Plant at Chaplin
 The site will be situated on Metrolinxowned property and occupy City of
Toronto roadway
 A fence will enclose the site to
demarcate the site from the public
roadway throughout the entire works
 The plant will service headwall
construction for Chaplin Station and
cross-passages at Vesta Dr and
Castle Knock Road
 The site is expected to be in place
for approximately 8-10 months
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18. Grout Plant at Chaplin
Advantages of jet grout
technique for headwall
installation:
Reduce requirement for
extensive utility relocation
Overall construction time
savings
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19. Timeline
With appropriate permissions in place Metrolinx’ contractor will:
 Begin to set up the grout plant
 Install fencing and secure the perimeter
 Install grout lines in the roadway
 Test works
 Begin Chaplin headwall construction works
 Chaplin headwall construction is currently scheduled to
commence in March 2014
 8-10 months anticipated
 Headwall works at Avenue Road and Bathurst are currently
being reviewed
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20. Chaplin Work Staging- South Setup
 Work is set up on the south side of Eglinton
 The work zone is separated from the ROW with concrete
barriers and fencing
 Unoccupied traffic lanes remain open on the north side of
Eglinton with one lane in each direction
 Through-traffic southbound on Chaplin at Eglinton will not
be permitted
 Southbound traffic must exit at Eglinton or choose an
alternate route
 Expected duration: Approximately 4 months
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21. Chaplin Work Staging- North Setup
 A work site is set up on the north side of Eglinton
 The work zone is separated from the ROW with concrete
barriers and fencing
 Unoccupied traffic lanes remain open on the south side of
Eglinton with one lane in each direction
 Through-traffic northbound on Chaplin at Eglinton will not
be permitted
 Northbound traffic must exit at Eglinton or choose an
alternate route
 Expected duration: Approximately 4 months
 Latimer Avenue is closed to/from Eglinton during this phase
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22. Chaplin Station
Plan View
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23. Chaplin Station
Preliminary Station Concept
Looking West
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24. Chaplin Station
Entrance Locations
Primary Entrance
Secondary Entrance
Secondary Entrance
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25. Next Steps
 Community Relations will outreach to specific condos and
apartment buildings to raise awareness of the site and
planned works
 Co-ordination with TTC will continue to ensure continued
bus service
 Co-ordination with local Fire Station also continues to
ensure service levels
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26. www.metrolinx.com
Thank you
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