SEIKAN TUNNELLERS FACE BAD GROUND

The author describes some of the problems encountered in constructing the Seikan undersea railway tunnel in Japan. Three tunnels are being built, the main tunnel, a pilot tunnel and a service tunnel. Setbacks have been caused by the geology of the seabed, a mixture of igneous rocks, tuff and mudstone. High water pressures have resulted in falls and very high rates of water ingress, the latest problem occurring when water burst into the workings and flooded sections of the three tunnels. Extensive grouting has been carried out to control inflow and new boring methods are being evolved to try and combat the problems of water laden strata. Experiments are also being tried with a diventip type electro drill and double pipe boring using a casing pipe. /TRRL/

  • Availability:
  • Corporate Authors:

    IPC Building and Contract Journals Limited

    Surrey House, 1 Throwley Way
    Sutton, Surrey SM1 4QQ,   England 
  • Authors:
    • Gosney, J
  • Publication Date: 1976-5-27

Media Info

  • Features: Photos;
  • Pagination: p. 21
  • Serial:
    • CONTRACT JOURNAL
    • Volume: 270
    • Issue Number: 5047
    • Publisher: Reed Business Information, Limited
    • ISSN: 0010-7859

Subject/Index Terms

Filing Info

  • Accession Number: 00141507
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Nov 3 1976 12:00AM