APPLICATION OF WATER JET CUTTING TECHNOLOGY TO THE TUNNEL EXCAVATION

It is possible to cut and fracture rock with high-speed water jets. Because of the many tunnels planned for extensions of the Japanese National Railways, a tunnel boring machine utilizing water jets is being developed. Grooving of the rock surface with jets prior to fracturing with a cutter or bit is found to speed the penetration rate by 2 to 5 times. Ultimately the goal is a tunneling machine where jets do the major cutting in rock and cutters play this role in soft rock.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/3127232
• Corporate Authors:

  JAPANESE NATIONAL RAILWAYS

  TOKYO,   Japan 
• Authors:
  • NAGANO, T
  • Kinoshita, T
• Publication Date: 1976-9

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 97-102
• Serial:
  • Railway Technical Research Institute, Quarterly Reports
  • Volume: 17
  • Issue Number: 3
  • Publisher: Railway Technical Research Institute/Tetsudo Gijutsu Kenkyujo
  • ISSN: 0033-9008
  • Serial URL: http://www.rtri.or.jp/eng/

Subject/Index Terms

• TRT Terms: Hydraulic jetting; Tunneling; Tunneling machines; Water cannons
• Old TRIS Terms: Hydraulic jets; Tunnel excavation
• Subject Areas: Bridges and other structures; Maintenance and Preservation; Railroads;

Filing Info

• Accession Number: 00156231
• Record Type: Publication
• Source Agency: Railway Technical Research Institute
• Files: TRIS
• Created Date: Jul 19 1977 12:00AM