Here's a link to the contractor's video, which clearly shows the last CN train through before the work began:
https://m.youtube.com/watch?v=r2hjBD9c4Q0
Note the discussion in the comments by the contractor about post-tensioning the box sections, and the reason for using this method rather than box-jacking. This would be a logical place to ask about technical details.
The only problem is that Whistler, BC is on Canadian National, it is not on Canadian Pacific. They guy who posted it must have worked for a contractor, not the railway.
Watch CP do an underpass of its 2 main tracks in 20 hours. Bridge and tunnel construction is certainly changing.
Samuel Bryant on LinkedIn: On the 25th of May 2016, workers had 20 hours and 5 minutes between | 14 comments
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