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McCormick Rankin Corporation (MRC) is an engineering consulting firm providing services in the fields of transportation, construction and environment. MRC was consulted by the Toronto Transit Commission (TTC) regarding the construction of a new streetcar tunnel under Queen’s Quay West. Upon investigation it was revealed that there is a timber crib structure under the Yonge Street slip along Queen’s Quay. The TTC was not aware of the crib structure’s existence and consequently their initial design work comprised of a straight tunnel passing along Queen’s Quay. As an alternative to rerouting the TTC would like to explore solutions such that a tunnel can pass straight through under Queen’s Quay as per their initial design.
Colin Ahola, a civil engineering co-op student from the University of Waterloo, was asked to analyse three potential solutions that would enable the proposed tunnel to pass through the crib without having to change its horizontal alignment and recommend a solution. The three options were (1) jet grouting, (2) new bulkhead construction, and (3) permeation grouting.
This case study seeks to demonstrate how socioeconomic and environmental factors pertain to civil engineering decisions. The case will also help illustrate the preliminary phases of the engineering design process. After completing the case study, students will be able to apply the principles governing grouting methods and bulkhead constructions, generate preliminary design solutions based on given constraints, generate a decision matrix to conduct an environmental analysis, and conduct a preliminary costing analysis and finally establish a final design solution.
If you would like to see more information on this case study, click here!
You can request this case study and a WCDE staff member will get back to you.
Contact Waterloo Cases in Design Engineering
Steve Lambert
Tel: (519) 888-4728
Email: steve@uwaterloo.ca
The University of Waterloo acknowledges that much of our work takes place on the traditional territory of the Neutral, Anishinaabeg and Haudenosaunee peoples. Our main campus is situated on the Haldimand Tract, the land granted to the Six Nations that includes six miles on each side of the Grand River. Our active work toward reconciliation takes place across our campuses through research, learning, teaching, and community building, and is co-ordinated within the Office of Indigenous Relations.