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Description: | A Tunnel Boring Machine breaks through at Bermondsey Underground station between London Bridge and Canada Water stations. The machine is a Kawasaki Earth Pressure Balance (E.P.B.) boring machine.
In some places the Jubilee Line Extension project used 'shotcrete', sprayed concrete lining, to coat the earth walls after boring, before a permanent lining was put in place. If this is done carefully the method is safe. However if it is applied wrongly as it was at Heathrow Airport in 1994, it can cause the collapse of the tunnel.
All these boring machines were given names. The two that burrowed under the Thames were called Tracey and Sharon. They were also fitted with internal offices. | Format: | image/jpeg | Publisher: | London Transport Museum | Rights holder: | QA Photos | Subjects: | Transport Work | Temporal: | Dec 1994 | Source: | London Transport Museum | Creator: | Photographer : QA Photos Ltd | Identifier: | http://www.20thcenturylondon.org.uk/rser... | Language: | en-GB | Format: | image/jpeg | Go to resource |
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