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.

Wal-Mart Micropiles

Wal-Mart Micropiles

Overcoming Poorly Engineered Fill This project solved a very difficult problem for Buttcon and Walmart Canada, with the new footings settling on a poorly done engineered fill. The previous winter
Read More

University of Ottawa STEM Complex

University of Ottawa STEM Complex HCM installed a 36,000 SF shoring system for the new STEM Complex at the University of Ottawa. To reduce the shoring schedule during the harsh
Read More

8 Ida Street

8 Ida Street HC Matcon was retained to install panel underpinning for a custom home built by Laureden Inc. in 2007 in one of Markham’s prestigious neighbourhoods.  Due to lack
Read More
HCM Group - Sage Condominiums: Phase II

Sage Condominiums: Phase II

Sage Condominiums: Phase II The construction of the new Sage Condominium required a shoring system that could facilitate the 10 meter foundation depth while working within encroachment restrictions. RWH Engineering
Read More
Currie Reservoir - Continuous Caisson Wall

Currie Reservoir – Continuous Caisson Wall

Increased Safety: We Used Horizontal H-Piles This project is a part of a large upgrade to the Currie Reservoir in southwest Calgary, Alberta. The project included the installation of a
Read More
Grand House

Grand House

Difficult But Not Impossible The Grand House is a student designed and constructed co-operative housing project located in Cambridge, Ontario.  It has won awards and is a landmark building. Due
Read More