Skip to content

Twinning Tunnels

Twinning Tunnels

The installation of a deep trunk sanitary sewer system in the bedrock beneath Erin Mills Parkway in Mississauga required an innovative approach for shoring manholes. For this project, HCM was contracted to install nine caisson wall compression rings at various locations. RWH Engineering Inc. (RWH), an HC Group company, provided an economical design for the shafts which had diameters of up to 11 meters and depths up to 50 meters.

RWH overcame several design challenges on this project including the consideration of the compression rings to withstand large uneven surcharges due to a close embankment as well as significant crane loads. To ensure the integrity of the shoring system, RWH provided the precision monitoring services.

This project required the installation of the compression rings into the bedrock to support the overburden. HCM successfully implemented RWH’s innovative design which did not include a bench at the top of the bedrock, as commonly seen in compression ring design. This resulted in a reduced diameter of the compression rings, significantly reducing the amount of bulk excavation required as well as installation time.

The project exemplifies HCM’s ability to find effective solutions to complex projects to minimize construction time.

Location: Mississauga, Ontario

Customer: McNally Construction Inc.

Lakeview Water Treatment Plant

Lakeview Water Treatment Plant This project was part of the second phase of an expansion program to the region of Peel’s Lakeview Water Treatment Plant. Given the information provided at
Read More
The Fuse at Evolution

The Fuse at Evolution

The Fuse at Evolution Following years of planning by the City of Calgary, construction on the anticipated East Village Development has started. The proud owners of the first land deal
Read More

Highland Creek WWTP

Highland Creek WWTP Due to increased population and the requirement for treating excess amounts of waste water, Highland Creek WWTP underwent a significant upgrade to provide clean water for the
Read More
CN Malton GO Station

CN Malton GO Station

Challenge: Build While Trains Are Running Work on the Malton GO Station in Toronto, Ontario includes improvements such as new walkways and a tunnel for pedestrian access to new platforms.
Read More

Dufferin Jog Elimination

Dufferin Jog Elimination This project involved the extension of Duffering Street under an existing CN rail line and through the abutment wall of a century old CN bridge at Queen
Read More
Mill Pond Estates

Mill Pond Estates

Shotcrete: Low Cost and Overcoming Hillside Access Issues This 12,000 sq. ft. project involved temporary hillside shoring for a developer in Tillsonburg. The project was completed during winter months with
Read More