TUNNEL RESEARCH DIGS DEEPER FOR AUTOMATED RIG

An automated tunneling and lining machine controlled by a single operator will cut manpower costs and humanize the back-breaking methods of boring small utility tunnels, The system, designed by Japan's Nippon Telegraph and Telephone Public Corp. is monitored from a computerized center in the access shaft. The hydraulic machine has a rotating cutting head and rotary loader that dumps muck on a conveyor. That front section advances while the rest of the shield remains stationary. Behind it trolleys on double tracks remove muck and deliver concrete to a pump that feeds a lining slipformer. The concrete mix contains an unsaturated polyester resin and fine sand as aggregate.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08919526
• Corporate Authors:

  McGraw-Hill, Incorporated

  330 West 42nd Street
  New York, NY  United States  10036
• Publication Date: 1984-1

Media Info

• Pagination: p. 52
• Serial:
  • Engineering News-Record
  • Volume: 212
  • Issue Number: 2
  • Publisher: McGraw-Hill, Incorporated
  • ISSN: 0891-9526

Subject/Index Terms

• TRT Terms: Admixtures; Automation; Concrete construction; Cost control; Hydraulic equipment; Information processing; Labor costs; Labor market; Linings; Polyester resins; Sand; Tunnel lining; Tunneling; Tunneling machines
• Uncontrolled Terms: Cost reduction
• Old TRIS Terms: Forms; Tunnels and tunneling
• Subject Areas: Bridges and other structures; Highways; Materials; Vehicles and Equipment; I34: Steels and Metals;

Filing Info

• Accession Number: 00385826
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Jun 28 1984 12:00AM