Bridge and underpass constructions

Trains Magazine General Discussion
1

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

2

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.

3

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.