Complex Logistical Constraints and their Technical Impact on A Deep Excavation Design, Ottawa, Ontario, Canada-PPT Presentation

PPT Presentation

Pdf Summary

The presentation describes shoring and excavation-support design for Zones 12 and 13A of Ottawa’s Confederation Line Extension, part of the City of Ottawa’s Stage 2 O-Train project. Delivered under a design-build contract by the Kiewit-Eurovia-Vinci joint venture, the wider Confederation Line West adds 15 km of rail, 11 stations, and tunnel segments.<br /><br />The case study focuses on how site and logistical constraints influenced support-of-excavation (SOE) design and construction. Zone 13A used internally braced secant piles, while Zone 12 used internally braced soldier piles and lagging. The presentation also highlights utility support, a watertight transition, and bulkhead removal as additional logistical and technical challenges. Construction photographs document work carried out on the project.

Keywords

Confederation Line Extension

Ottawa Stage 2 O-Train

shoring design

excavation support

Zone 12

Zone 13A

secant piles

soldier piles and lagging

utility support

watertight transition