The Toronto Transit Commission is starting a $2.6 Billion project to connect the City of Toronto with the municipality of York. This Toronto-York Spadina Subway Extension Project (TYSSE) consists of an 8.2 km extension of the existing subway system, including over 6 km of 5.4 m diameter twin tunnels bored with 4 (yep, 4) Lovat Tunnel Boring Machines or TBMs. The new stations and lines are scheduled to be open in 2015. [Source: thestar.com via ASCE SmartBrief. Image: Toronto Transit Commission]
The geotechnical program is about to begin on the $2.2B AUS ($1.4B USD) Coffs Harbour Bypass project in New South Wales, Australia. The design-builder will be conducting over 300 boreholes between 4 and 70 m […]
The repaired cutterhead has been in the pit several weeks now, and the final three pieces of shielding for the Bertha TBM have been lowered into the access pit. Seattle Tunnel Partners team members will […]
The US House of Representatives passed legislation approving a national tunnel inspection program. This of course came about as a result of a fatal accident from 2006 in a tunnel on Boston’s Big Dig project where a concrete ceiling tile fell on a car killing one person. More after the break.
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