The presentation will look at the system by which tunnels were built in the 19th century following the traditional English method. It will include illustrations based on F.W. Simms 'Practical Tunnelling' for his work at Bletchingley and Saltwood tunnels, C. Gripper and Thomas Walker on the Severn Tunnel and from several other tunnels now belonging to Network Rail.
It will show elements of the setting out and sinking of shafts, driving a heading, opening out the main tunnel and lining it and will end by describing some typical tunnel features.
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