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Post by hollyhiccups on Jan 22, 2012 11:08:51 GMT
From what I have seen most of the tunnel walls in the London Underground are either: - steel panels riveted and bolted together - concrete Are there any other wall materials? I have seen that cabling, lights etc are fitted to the walls with either large hooks perpendicular to the wall (cables) or there are steel channels in a groove in the concrete wall - would anyone happen to know what size these are and if they are a standard size? Also - how curved are the walls? Or is that more of a common misconception? and... HOW curved? And are they uniformly curved? Thank you for any help or information!  |
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neilw
now that's what I call a garden railway
Posts: 284
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Post by neilw on Jan 22, 2012 13:05:06 GMT
There are two basic tunnel construction used, as you may know.Sub surface lines run in tunnels built under roads, and use bricks for the vertical side walls and arched roofs across the top. It is easy to see the profiles at stations, etc. Tube lines run in tunnels of nominally 12 feet diameter which are completely circular in cross-section. In general they are lined with cast iron segments bolted together, although later lines (Vic onwards) used concrete segments. The cables and pipes are generally hung on standard hanger arrangements, someone better informed may have the dimensions.
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North End
Beneath Newington Causeway
Posts: 1,769
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Post by North End on Jan 22, 2012 18:14:42 GMT
From what I have seen most of the tunnel walls in the London Underground are either: - steel panels riveted and bolted together - concrete Are there any other wall materials? I have seen that cabling, lights etc are fitted to the walls with either large hooks perpendicular to the wall (cables) or there are steel channels in a groove in the concrete wall - would anyone happen to know what size these are and if they are a standard size? Also - how curved are the walls? Or is that more of a common misconception? and... HOW curved? And are they uniformly curved? Thank you for any help or information! Most Tube tunnels are either (pre-cast) concrete or cast iron. The current term for iron tunnels is "spheroidal graphite iron" (SGI), as used on the Jubilee Line Extension, and a few limited parts of the Northern Line. On the Northern Line, the original station tunnels from King William Street to Stockwell are lined with brick. There is also a 60-metre section of the Northern Line now lined with stainless steel segments, immediately south of Old Street. The Waterloo & City Line is lined with cast-iron segments, however the segments are filled with concrete to give a smooth tunnel profile. The Jubilee Line and Northern Lines have some sections lined with sprayed concrete (SCL), as part of the New Austrian Tunneling Method used in the 1990s. This applies to the section from Waterloo to Jubilee Gardens on the Jubilee Line, and also various tunnels at London Bridge on both lines. |
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Deleted
Deleted Member
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Post by Deleted on Jan 22, 2012 18:16:23 GMT
Deep tube tunnels are circular, cast iron tunnel segments, bolted together. The JLE has concrete tunnel segments (interestingly not the spray and mesh method!) it would so appear.
Cut-and-cover railway (the District, Metropolitan, Circle and Hammersmith & City lines) use brick tunnels, with what appears to be metal segments in station ceilings.
Not sure what the 70s Piccadilly cut-and-cover out by Heathrow is.
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