A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
New duplicate blackwall tunnel
Old Blackwall Tunnel, opened in 1897, is duplicated by new tunnel situated approximately 230 yd downstream of and roughly parallel with existing tunnel; overall length of 30 ft 6 in. external diameter cast iron tunnel (including shafts) is approximately 2914 ft compared with 3116 ft for existing tunnel; main section, 2565 ft 6 in. long between caissons, was driven under compressed air; by late Eocene times entire area was covered by London clay, below which lay silty sands of Woolwich beds; compressed air methods of tunnel construction; tunnel was finished with aluminum sheeting coated on both sides with light gray plastic laminate; lighting and ventilation facilities.
New duplicate blackwall tunnel
Old Blackwall Tunnel, opened in 1897, is duplicated by new tunnel situated approximately 230 yd downstream of and roughly parallel with existing tunnel; overall length of 30 ft 6 in. external diameter cast iron tunnel (including shafts) is approximately 2914 ft compared with 3116 ft for existing tunnel; main section, 2565 ft 6 in. long between caissons, was driven under compressed air; by late Eocene times entire area was covered by London clay, below which lay silty sands of Woolwich beds; compressed air methods of tunnel construction; tunnel was finished with aluminum sheeting coated on both sides with light gray plastic laminate; lighting and ventilation facilities.
New duplicate blackwall tunnel
Roads Road Construction
1967
5 pages
Article (Journal)
English
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Engineering Index Backfile | 1895
Engineering Index Backfile | 1895
| Engineering Index Backfile | 1966
Engineering Index Backfile | 1900
Ventilating new blackwall tunnel
Engineering Index Backfile | 1967