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

Kidd’s Creek Culvert Restoration

Kidd's Creek Culvert Restoration

Versatile Installations Minimized Costs

Work on the Kidd’s Creek Culvert Restoration project involved the supply and installation of 600 plus helical pile supports for new catch basins, man holes, culverts and storm and sewer pipe in downtown Barrie, Ontario.

  • Helical pile support systems were ideal for use on the project based on the type of soils encountered and the project location related to the nearby lake. Excavation parameters were further impeded by the proximity of streets and roads required to be in operation while the work was in progress. 50 Kip design capacities were achieved on small diameter pipe, (2-7/8) which were installed and torqued as required.
  • The versatility of the installations enabled the Owner to minimize costs by installing only lengths and depths required.
  • Due to the nature and achievable installation production rate it was possible to stay ahead of the concrete work as small areas of work were excavated in sections.

The helical pile supports were utilized on both the Kidd’s Creek project as well as the second phase of the retrofit and expansion located at Toronto and Simcoe Streets in Barrie, Ontario.

Client: Drainstar Contracting Ltd
Location: Barrie, Ontario

Aldershot GO Station Improvements

Aldershot GO Station Improvements

Our Innovative Solution Saves Time

Work at the Aldershot Go Station in Burlington, Ontario comprised of the construction of two new pedestrian tunnels to access the existing passenger platforms. The project was further complicated by the proximity of high speed passenger train rails and the need to maintain and operate the facility while the work was in progress.

  • In order to minimize the impact of the installation of the shoring, HC Matcon Inc. opted to install a single row of multi-strand high capacity tie backs; in excess of 900 KN capacities.
  • The high design loads required these anchors installed under strict on site quality control of strand and grouting procedures.

The innovative approach taken by HC Matcon Inc’s design team provided the optimum solution to the strict requirements of the project while, significantly reducing the duration and subsequent impact to the overall project completion schedule.

Client: Kenaidian Contracting
Location: Burlington, Ontario

Niagara Biosolids Facility – Inside Pit

Niagara Biosolids Facility - Inside Pit

A Shotcrete Solution to a Difficult Problem

Work to the existing Biosolids Facility required the installation of deep pits and foundations for proposed processing equipment.

  • Due to the tight confines of the site and the proximity of exterior walls, columns and footings, the use of a traditional soldier pile and lagging system was not feasible.
  • Instead, a shotcrete shoring and underpinning solution was developed in conjunction with the Owner and the General Contractor.
  • By working with the forming contractor, a zero clearance solution was used as the backside of the new form work.
  • In addition to vertical cut stability, the shotcrete was also designed to provide underpinning stabilization to the undermined column pad footings and exterior wall footings.
  • By placing strategically located vertical mini piles at and around the pad footings, the additional stabilization was achieved.

The use of the shotcrete solution in this application allowed the General Contractor to minimize disturbance and disruption to the ongoing facility operations.

Client: Stucor Construction Ltd
Location: Niagara Falls, Ontario