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Stamford Barnack Road tunnel completed

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HowardGWR

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Can anyone tell what was done internally here? At the ends, the roof has been raised (see photos at this link
http://www.stamfordmercury.co.uk/ne...etes-work-on-stamford-tunnel-early-1-7199501?

The newly rebuilt railway tunnel beneath Barnack Road in Stamford, which was completed by Network Rail ahead of schedule

1386843846.jpg


Hope this image copy works!

Edit, wow it did! :)
 
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HowardGWR

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The Mercury piece is based on this press release but it doesn't say any more:

http://www.networkrailmediacentre.co.uk/news/stamford-tunnel-works-completed-ahead-of-schedule
Indeed. Comparisons of this photo with GSV images at both ends shew that the height of the entrance is raised by a concrete insert (very neat) and the parapet also made higher with the local stone - very smart.

I just wondered whether it was just the ends - it could not possibly have involved the whole length as you'd need a TBM to achieve that - perhaps it's already high enough for electrification inside.
 

swt_passenger

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Indeed. Comparisons of this photo with GSV images at both ends shew that the height of the entrance is raised by a concrete insert (very neat) and the parapet also made higher with the local stone - very smart.

I just wondered whether it was just the ends - it could not possibly have involved the whole length as you'd need a TBM to achieve that - perhaps it's already high enough for electrification inside.

It is just that one end, where the tunnel entrance is on a bit of a skew angle compared to the road above.

There is a planning application available on the South Kesteven district council planning website, reference is S15/2109; the drawings therein suggest they have replaced the concrete beams that support the road, and the parapet at that end only.

Network Rail's PR certainly seems to exaggerate what has been done, given the overall length of the tunnel they have only worked on a relatively small fraction.

From the design and access statement it seems to have been more of a repair rather than anything to do with infrastructure improvements such as electrification.
 
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edwin_m

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It won't be for eletrification because there is no committed electrification scheme for that route. However if they need to do work for other reasons then they will provide electrification clearances where that can be done at little or no extra cost. The part of the tunnel where no work has been done probably still doesn't have electrification clearances.
 

DaleCooper

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There's also a new housing development on top of the tunnel and the tunnel isn't very deep, I wonder if anything has been done in relation to that.
 

deltic08

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There's also a new housing development on top of the tunnel and the tunnel isn't very deep, I wonder if anything has been done in relation to that.

Has it been done for gauge clearance for big boxes from Felixstowe to Birmingham area container depots?
 

swt_passenger

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Has it been done for gauge clearance for big boxes from Felixstowe to Birmingham area container depots?

A few hours ago I looked up the planning application. I can assure you that enhancements are not mentioned. It is strengthening at that end only.
 

HowardGWR

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A few hours ago I looked up the planning application. I can assure you that enhancements are not mentioned. It is strengthening at that end only.
Thanks SWT_passenger, I only raised the thread because I wondered about what the real reason was for what was done. Clearly what was done is future proofed, but I suspect that if electrification ever was proposed, a survey to investigate lowering the track would follow.
 

swt_passenger

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Thanks SWT_passenger, I only raised the thread because I wondered about what the real reason was for what was done. Clearly what was done is future proofed, but I suspect that if electrification ever was proposed, a survey to investigate lowering the track would follow.

I think its a pity the Network Rail press releases are so dumbed down. It wouldn't have needed much more detail to clarify the purpose.

Up thread someone suggested gauge clearance, but the route specification already shows the line as W10. The relatively minor increase (in width only) that W12 requires wouldn't normally affect the height. It looks from Google Earth as though the tunnel must follow the road, and may even be cut and cover construction (aka 'covered way'), so they probably won't ever be able to increase the height significantly if it became needed.
 

HowardGWR

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So that (many thanks) is why the route is W10, and I take SWT_passenger's comment that it may be too narrow for W12. I just wonder if it is high enough to string a wire through (at least those rail things), in which case it would leave it possible for a future electrification. I know that's not planned but IMO, inevitable eventually.

Clifton Taylor's voice sounds a little dated now, but his diction and clarity are admirable.
 
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