Owner
Infrastructure Ontario / Metrolinx
Client
WestEnd Connectors, EJV by Typsa and EXP
Cost
$729 million CAD
Timeframe
December 2021
— December 2025
Services performed
Dr. G. Sauer & Partners is part of the West End Connectors design team to develop detail design for the excavation and support, waterproofing and final lining of nine SEM Cross Passages.
Description
The Eglinton Crosstown West Extension (ECWE) Advance Tunnel Project 1 is the first phase of work for the 9.2 kilometre extension of the Eglinton Crosstown LRT (future TTC Line 5). The extension will run mostly underground, westward from Mount Dennis Station to Renforth Drive. The Advance Tunnel 1 contract consist of the design and construction of approximately 6km of twin single track TBM tunnels with pre cast tunnel lining (PCTL), a launch and a main shaft, eight headwalls for future stations and nine SEM Cross Passages (CPs) with Sheet membrane waterproofing and CIP final lining concrete.
Geology
The geology ranges from made ground top layer to glacial deposits of sands, silts, clays and their mixtures to the underlying Georgian Bay Shale, a jointed soft rock with locked in horizontal stresses and a potential for swelling.
Location
Toronto, Canada
Highlights
- Change Steel Liner Plate design in RCD to SEM design.
- Bespoke SEM excavation and support design for 3 Cross Passages in Soft Ground and 6 in Shale.
- Waterproofing Connection detail between SEM and PCTL.
SEM CP to PCTL waterproofing connection detail
3D CAD image of CP final lining tie-in to PCTL
3D FE modelling Stage: Top heading excavation
3D FE Modelling Stage: Invert Excavation
3D FE Modelling Stage: Activation of Final Lining
3D FE modelling of TBM and CP construction process
3D FE modelling of TBM and CP construction process
Detailed 3D FE Modelling of CP bulkhead and PCTL interface