TTC St. Clair Station

Caissons

Overcoming Tight Access and High Water Table

Two new elevators on the east and west sides of St. Clair station were installed to allow easier access for disabled persons. During construction, HC Matcon was confronted with some interesting challenges, including extremely tight access and a high water table.

The east elevator pit was constructed with a 10 m deep caisson wall, braced horizontally against the existing subway structure. Piles were drilled with a Bauer BG 22H self-lining drill in order to overcome the high groundwater conditions.
The west elevator pit was constructed with an 8 m deep lagging wall, the piles for which were drilled in a single weekend in order to comply with TTC and City of Toronto access restrictions.
HC Matcon’s excavation operations were aided by our own dewatering systems installed at each elevator pit.
A total of 4 deep wells were effectively used to lower the water table below final excavation grade.

Client: Consolidated Canadian

Location: Toronto, Ontario

Medicine Hat Regional Hospital – New Tower Expansion

/ Caissons, Micropiles, Underpinning

Medicine Hat Regional Hospital – New Tower Expansion The Government of Alberta and Alberta Health Services (AHS) have broken ground on this project, which will renovate and expand the hospital

St. Joseph’s Health Centre Parking

/ Caissons, Shotcrete, Underpinning

Shotcrete Reduces Costs for Owner The St. Joseph’s Health Centre is adding a new Our Lady of Mercy wing complete with three levels of underground parking. HC Matcon was responsible

Parkside Dr. Slope Stabilization

/ Helical Piles

Parkside Dr. Slope Stabilization The City of Toronto tendered a slope stabilization project that required the installation of helical piles in the embankment of a failed slope on Parkside Drive

TTC Wilson Complex Modification

/ Micropiles, Shotcrete, Soldier Piles & Lagging, Underpinning

Engineering Solutions The Toronto Transit Commission will be purchasing all new subway cars in the near future, creating the requirement of larger maintenance carhouses. The original contract drawings employed caisson

144 Park Street

/ Shotcrete

144 Park Street During the bidding process, HCM proposed an innovative design-build shoring solution for the 144 Park Street project, a 19 storey condominium in the downtown core of Waterloo.

University of Toronto Faculty of Law

/ Micropiles

TTC Steels Launch Shaft The expansion of the Faculty of Law building at the University of Toronto incorporated the addition of another storey to the existing building. The increased loading