Construction of a support system (umbrella)
Did you know that a support structure called an umbrella (or horizontal piling) will be put in place during the construction of Rideau Station west entrance?
The umbrella will reinforce and support excavation and construction of the integrated entrance. The umbrella will be built from horizontal piling/reinforced steel pipes. Horizontal piling consists of drilling holes, inserting steel pipes and then grouting the pipes in place with concrete. This is done to support the entrance opening.
Check out this cool video that provides a glimpse of crews installing an umbrella https://www.youtube.com/watch?v=ceNjQl1nFLI.