Projects

The massive mixed‐use redevelopment of the Honest Ed’s and Mirvish Village includes six main towers of up to thirty storeys, offering over 800 modern residential and commercial units in Downtown Toronto’s Annex area (Bloor & Bathurst neighbourhood). Tarra Engineering and GFL Environmental were retained to design and to provide excavation shoring services for the project. Excavation shoring was required on two adjacent lots, namely the west property and the massive east property, where most of the future towers are to be constructed. West property consisted of two underground levels while the east property consisted of four underground levels. All work had to be designed and completed in the vicinity of existing retail stores and residential houses, including selected heritage façade and buildings that are to be preserved.

The mixed-use development includes a eight-storey modern concrete structure boutique condominium and commercial building in the west end of Toronto. The architecturally complex building consists of large cantilever floor plates that are supported on deep foundations. The project design and construction was significantly complex due to the large overhang terraces and extremely limited space and poor ground condition. The reinforced concrete structure is comprised of flat slab and shear and load bearing walls that were supported on the second floor transfer floor that is comprised of transfer slab and transfer beams.

A grade separation to create a six lane subway beneath the Canadian Pacific Railway (CPR) necessitated construction of seven new, deep-founded structures: two abutments, one pier and four retaining walls. These structures are all supported by micropile foundations designed by Tarra Engineering.

A grade separation for Stouffville line at Sheppard Street East was constructed to allow for traffic pass through and underpass. The scope of work for this project included design of temporary track protection structure, earth retention structure and temporary support for utilities and underground structure to allow construction of bridge abutments and separation walls.

As part of the subway expansion, OHL-FCC Limited Partnership was awarded the construction of multiple numbers of stations and auxiliary shafts. Tarra Engineering & Structural Consultants Inc. was awarded the design and production of construction drawings for 407/Jane Street, the extraction shaft known as South WYE and a number of access and air shafts. South WYE is a very large 21m x 60 x 20m deep excavation shoring comprised mainly of interlocking caisson wall with a soft head wall (constructed with fibre reinforced construction) to be cut and cored by a TBM machine.