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Description: | The men work in a 16-foot- (4.9-metre-) diameter hand shield using picks and shovels to dig the tunnel used for the diversion of the Northern City line at Highbury.
This shield, used for building short lengths of tunnel, was no more sophisticated than the one designed by Greathead in the 1880s. It was also used for building the tunnel south of Victoria, because of the heavier clay soil type there.
For long straight sections of tunnel in north London, a mechanised digger was employed. | Format: | image/jpeg | Publisher: | London Transport Museum | Rights holder: | Transport for London | Subjects: | Transport Work | Temporal: | 20 Aug 1964 | Source: | London Transport Museum | Identifier: | http://www.20thcenturylondon.org.uk/rser... | Language: | en-GB | Format: | image/jpeg | Go to resource |
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