London Transport History - Tunnelling
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Scan day: 18 February 2014 UTC
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Description: Illustrated commentary on tunnelling methods used in the 19th century.
Gallery: Digging deeper > Tunneling - Online Museum, London Transport Museum Digging deeper > Tunneling The soft clay under most of London is good for tube tunnelling. It is easy to dig out and does not collapse readily. But there are also unstable sand and gravel beds under London. These can make tunnelling dangerous.
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| Page title: | Gallery: Digging deeper > Tunneling - Online Museum, London Transport Museum |
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