Weston Tunnel
CLIENT
Metrolinx
LOCATION
Ontario
DELIVERY MODEL
Design-Bid-Build
PRIME CONSULTANT
AECOM
SECTOR
Civil Infrastructure | Transportation
PROJECT VALUE
$193 million
COMPLETION DATE
November 2014
Project Overview
The Georgetown South Weston Tunnel Phase 3 Grade Separation contract was part of the new Union Pearson Express between Toronto’s Union Station and Toronto Pearson International Airport. Located between Weston Rd. and Lawrence Ave., the contract consisted of lowering the rail corridor and constructing a 1.2 km long concrete structure, with ballast and base slabs, retaining walls, and walls supported by struts, including a concrete-covered portion between King St. and Church St. Track capacity was increased to allow for the future expansion of four additional tracks. The scope of the tunnel work consisted of a 185 m tunnel, 3 m in diameter, 20 m below King St., and a cast-in-place manhole shaft.
The 3000 mm super pipe tunneling operation used a tunnel boring machine. Work was restricted due to the limited area around the CN and CP Corridor and proximity to significant buildings, existing water mains, sewers, fibre optic works, and live railways. The scope also included relocating utilities, installing a storm sewer, and replacing the sanitary sewer along Rosemount Ave. Precise scheduling was a key factor to allow for undisrupted GO/CP Rail Trains.
This project placed 71,000 m3 of concrete during its 36-month schedule.
Winner of the 2016 Ontario Concrete Award for Specialty Concrete and the 2014 Ontario Builders Award – Top Project Category 5.
Project Photos
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