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.

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  • Corporate Authors:

    JAPANESE NATIONAL RAILWAYS

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

Media Info

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Filing Info

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