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