St. Joseph’s Health Centre Parking

St. Joseph's Health Centre Parking

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 for:

  •  installing the approximately 20,000 square feet of zero clearance shotcrete and caisson wall to be used as a back form for the foundation walls.
  • 121 caissons to support the foundation perimeter and new ambulance bay canopy drilled with a Watson 3110.

HC Matcon’s alternative shotcrete shoring solution added value to the project with a substantial cost savings to the owner.

Client: Harbridge and Cross
Location: Toronto, Ontario

Guelph Civic Administration Complex

Guelph Civic Administration Complex

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 shoring systems.

  • Shoring designs were required to incorporate work next to the existing CN passenger rail tracks and the historical heritage buildings being developed into the new structure design.
  • Due to the nature and age of the buildings impacted by the work shoring design required flexibility of design while maintaining and adhering to the strict tolerances required by the specifications.

The combination of the shoring systems in conjunction with the design capacity for on site modifications allowed the excavation to be completed uniformly across the site and helped to accelerate the construction schedule.

Client: Urbacon Ltd
Location: Guelph, Ontario

TTC St. Clair Station

TTC St. Clair Station

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 withsome 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

TTC St. Clair Station

TTC St. Clair Station

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

Mars B Toronto General Hospital

Mars B Toronto General Hospital

This 3.5 Million dollar contract involved HC Matcon providing a full excavation, a 16,000 Sq. Ft. shoring and large diameter caisson package for this project. Challenges included the support of historical facades, tight working room, land locked site location and staged demolition. The site required all 4000 Dump Truck loads to be removed through a narrow laneway. HCM demolished a 14 Ft. brick service tunnel, while maintaining a 6 inch live steam line, through piled supports, eventually digging under the live line to maintain schedule. The combined shoring and excavation package was well suited to this project requirement as tight co operation between the excavator and shoring contractor was critical. HC Matcon maintained excavators on site during the full project duration which allowed for many advantages to Ellis Don and the owner.

Client: EllisDon
Location: Toronto, Ontario

Brantford General Hospital

Brantford General Hospital

This innovative project represents the first use of shotcrete shoring in place of caisson walls against a building in Ontario. Caisson walls have typically been utilized duw to low movements from the inherent stiffness of the shoring wall. Soldier Piles and lagging walls may move up to 25 mm if properly designed, while caisson walls will move as little as 4-6mm. The soil was a poorly graded medium grained sand which required special measures, including vertical mini piles for vertical load restraint and face savings (avoid ground loss). A significant savings to the General Contractor resulted and the project was a technicall success, in that the maximum inclinometer movement was 4mm. This 4mm achievement signals a new opportunity for owners and General Contractors as the shotcrete shoring space savings and costs saving is very real. 

This project supported an 8 storey hospital, with critical operating rooms, and the shotcrete shoring solution provided a vibration free installation with no structural damages to the owner’s hospital.

Location: Brantford, Ontario

Customer: Bondfield Construction Company