The Anonymous Widower

‘Box Structure’ Flyover Saves £70m And Six Months For East West Rail

The title of this post, is the same as that of this press release on Network Rail.

This is the first paragraph.

Engineers have saved £70m of taxpayers’ money by using creative new methods to build a railway flyover as part of the East West Rail project.

This Network Rail picture shows how the new flyover rests on a concrete box, that spans the West Coast Main Line (WCML).

Note that the press release contains a video that explains how the flyover was replaced and why the method of construction saved all the money and time.

The main cost savings came about because of the following.

  • Construction could go on above the WCML without having to stop the trains.
  • Components for the flyover were made in a factory, with subsequent cost reductions and quality increases.

Anybody, who’s ever poured a concrete slab in typical British weather will understand the second point.

According to the press release, the method of construction gives a hundred and twenty year life span for the structure.

For comparison, this 3D Google Map visualisation shows the Hitchin flyover, which was opened in 2013.

Note the columns supporting the single-track railway.

If this was being built today, would a box be used as at Bletchley?

November 16, 2021 - Posted by | Transport/Travel | , , , , ,

1 Comment »

  1. great to see the innovations BR were exemplary at to keep the trains running haven’t been lost

    Comment by Nicholas Lewis | November 16, 2021 | Reply


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