Cedarvale station was constructed as part of the Eglinton Crosstown Light Rail Line, under the operational Yonge-University Line Subway box of Toronto Transit Commission (TTC). The station was constructed as open-cut, which necessitated the underpinning of the existing TTC box to minimize the impact on the Subway and allow its unhindered operation. Six mined galleries, each 4m wide by 2.75m high, were excavated sequentially (SEM), immediately under the existing box, to provide the required space for the installation of the main underpinning beams. This novel solution was executed successfully, providing quick access for the main excavation works to commence. Dr. Sauer & Partners' Elmar Feigl will deliver an evening presentation for the Tunnelling Association of Canada.
For more information or to register, visit the TACs website.
Completed Gallery under TTC box