Underpass design for expansion of the CN Grimsby Subdivision
Complex utility design integration of hydro, communication, and gas services
- Reconstruct Centennial Parkway to an expanded four lanes and construct a new subway corridor and CNR expansion, while maintaining existing vehicular traffic as well as train operations (Grimsby Subdivision).
- The project scope includes the detailed design and tender delivery of a major utility plant relocation and road detour (advanced tender).
- Grade separation design incorporates allowances for future Centennial GO Station infrastructure including fit-outs for stair access from the road (integrated in abutment design) and station platform (design loads and geometry).
- Adapted a work plan that allowed for advanced utility relocation in conjunction with a "Detour Road" tender, as well as a tender for bridge steel to facilitate staging strategies to mitigate operational impacts to utilities, road traffic, and train operations.
- Bridge design facilitated both interim and future conditions related to the Centennial GO Station. Interim design consisted of a single-track superstructure (through-plate girders (TPGs)) that were laterally jacked north and south in staged construction to assist in rapid construction delivery during short track block durations.
- Bridge designed to allow for repositioning of girders for the provision of future track and GO station platform infrastructure.
- Lateral jacking of through-plate girders to assist rapid construction delivery
- The design of a new storm water management system intended to alleviate surcharging and overflow of existing local trunk system, and redevelopment of outfall to mitigate deterioration to embankment of downstream discharge channel.
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