TUNNEL HEADER WILL BORE 17 KM OF UNDERGROUND ROADS

The machine described is designed to allow annular steel ribs (I sections or TH sections) to be erected immediately behind the dust shield. This puts the ribs about 1,60 m behind the gage cutters of the cutting wheel. A steel rib erector is used for the erection.

  • Corporate Authors:

    Donnelley (Reuben H) Corporation

    466 Lexington Avenue
    New York, NY  USA  10017
  • Publication Date: 1980-8

Media Info

  • Pagination: p. 59
  • Serial:
    • World Construction
    • Volume: 33
    • Issue Number: 8
    • Publisher: Donnelley (Reuben H) Corporation

Subject/Index Terms

Filing Info

  • Accession Number: 00329728
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Apr 15 1981 12:00AM