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Twinning Tunnels

  • Caissons

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.

Burke Residence

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Burke Residence The site topography presented the challenging task of installing shoring on steep slopes which impeded the accessibility of conventional equipment to the residential lot at the back alley
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Guelph Civic Administration Complex

Guelph Civic Administration Complex

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Complex Shoring Requires Innovative Design Work on this site involved the supply and installation of caissons, underpinning, rock anchors, as well as both traditional soldier pile and lagging and shotcrete
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Bluwater Condominiums

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The Pemberton Group is adding the luxury waterfront Bluwater Condominiums to its portfolio. The 22,000 SF area of shoring area will accommodate the construction of three eight-story buildings on the
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The Osterberg Cell

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Dufferin Mall

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Dufferin Mall Pedestrian Tunnel This renovation project includes the challenge of constructing a 10ft wide by 12ft deep pedestrian tunnel inside an active mall. HCM together with RWH Engineering proposed
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Upper House Condominiums - Caisson Wall Piles and Lagging

Upper House Condominiums

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Upper House Condominiums HCM completed the shoring for the eight storey Upper House Condominium project which required a 12m deep excavation for two levels of underground parking. A tied-back shoring
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