MODERN TRENDS IN SOFT GROUND TUNNELLING

Tunnel shield types are reviewed (Brunel Shield, Greathead shield, rotary shield, drum diggers, and modern shields) and the use of compressed air as a means of excluding water from tunnels is discussed. Two recent examples (Clyde tunnel and the Dartford tunnel) are discribed. The utilization for tunnel linings of cast iron, concrete, and unbolted, unreinforced segments is outlined. In a discussion of the need for treatment of the ground to be traversed, the injection is described of a fluid or fluids (having suitable setting properties) into the voids between the soil particles through tubes drilled or hammered into the previous stratum. Other treatments are also briefly reviewed. Output is discussed and a table is presented which shows the significant advance made in output by the development and use of the drum digger and the use of unbolted segments. The costs of tunneling are discussed.

  • Corporate Authors:

    Morgan-Grampian Limited

    30 Calderwood Street
    London SE18 6QH,   England 
  • Authors:
    • Haswell, C K
  • Publication Date: 1964-2

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 181-187
  • Serial:
    • Volume: 59
    • Issue Number: 691

Subject/Index Terms

Filing Info

  • Accession Number: 00262789
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 27 1974 12:00AM