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Post by Deleted on May 20, 2015 13:05:34 GMT
Can anyone shed any light on what is being constructed next to Northwood sidings? At first it appeared to be a wooden structure akin to Noah's Ark, but it seems that was just a frame for an inverted brick arch. Does anybody know what this is?
(I will try to get a picture)
Thanks
Ben
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Post by Deleted on Jun 8, 2015 7:02:41 GMT
Can anyone shed any light on what is being constructed next to Northwood sidings? At first it appeared to be a wooden structure akin to Noah's Ark, but it seems that was just a frame for an inverted brick arch. Does anybody know what this is? (I will try to get a picture) Thanks Ben I was on the intranet at work, and found there is an article about it. It is a replica tunnel so that they can trial new engineering techniques. |
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Post by Deleted on Jun 8, 2015 9:54:37 GMT
Can anyone shed any light on what is being constructed next to Northwood sidings? At first it appeared to be a wooden structure akin to Noah's Ark, but it seems that was just a frame for an inverted brick arch. Does anybody know what this is? (I will try to get a picture) Thanks Ben I was on the intranet at work, and found there is an article about it. It is a replica tunnel so that they can trial new engineering techniques. I guess LU has not got enough tunnels already!  XF |
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Chris M
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Post by Chris M on Jun 8, 2015 10:20:50 GMT
I'd much rather they experimented on one that wont disrupt the service if they get it wrong!
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Post by version3point1 on Jun 8, 2015 17:58:53 GMT
We call it 'The Ark' on the Met!
As a project of the Track Partnership team, it is supposed to be replica of a portion between Baker Street – Finchley Road, hopefully in anticipation for the eventual (and much-needed) track renewal along that stretch. Best to have somewhere to train and get used to the constraints of the workspace in a way that doesn't interfere with the existing infrastructure, so hopefully work will go smoothly if/when they do get down to do it for real.
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Post by drpete on Jul 9, 2015 7:08:27 GMT
Are they simulating the bottom of the running tunnel?
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Post by Dstock7080 on Jul 9, 2015 8:26:33 GMT
Are they simulating the bottom of the running tunnel? Replica tunnel helps avoid major closure: " The three-year project has involved the creation of a 15-metre replica of the Baker Street to Finchley Road tunnel, which allows the team to test materials and working methods beforehand for complex track renewal, ahead of work starting in June.
The original plan for improving the tunnel and replacing this section of track involved a 22 week blockade.
Now the project is planned to be carried out mainly in engineering hours – a world-first for a project of this size and complexity – and a reduced number of planned closures, thanks to the replica tunnel which is nearing completion at Northwood Sidings.
The difficulty with this project lies within the different types of track that currently exist within the tunnel – twin and single bore tunnel track, covered ways and open sections. These must be renewed and turned from ballasted track to slab track in the tight tunnel space. Slab track has been delivered before but never in this situation using this methodology.
Other work that must be completed includes renewing a set of points and the drainage within the tunnel, as well demolishing one bridge and refurbishing another." |
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Post by drpete on Jul 9, 2015 20:43:22 GMT
Excellent - thanks!
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