Chaplin Grout Plant and Headwall Construction

transcript

Jamie Robinson Director, Communications and Community Relations Toronto Expansion Projects, Metrolinx

Chaplin Grout Plant and Headwall Construction Spring 2014 Councillor Stintz Briefing February 3, 2014

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

Tunnelling Works 2014

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

Tunnel Drive Sequence

2. Construct Extraction Shaft

1. Construct Tunnel Launch Shaft

Install Jet Grout Block “Headwalls” from Surface

Commence Mining Twin Tunnels

Mine-Through Jet Grout Blocks

• Excavate Station and Commence Removing Concrete Tunnel Liners

After Tunnel Contract: • Install Station

Sidewall and Headwall Support of Excavation

Finally: • Station Box Fully

Excavated & Tunnel Lining Removed (Not shown)

Launch Shaft Tunnel Boring Machine

Tunnel Drive Works 2013

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

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

Tunnel Drive Works

Secant pile wall : formed by intersecting concrete piles

Jet grout wall : uses engineered grout to form wall in situ

Jet Grout Headwalls

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.

The site will be situated on Metrolinx-owned 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

Grout Plant at Chaplin

Advantages of jet grout technique for headwall installation: Reduce requirement for

extensive utility relocation Overall construction time

savings

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

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

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

Chaplin Station Plan View

Chaplin Station Preliminary Station Concept

Looking West

Chaplin Station Entrance Locations

Primary Entrance Secondary Entrance

Secondary Entrance

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

www.metrolinx.com

Thank you

Chaplin Grout Plant and Headwall Construction

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