TUNNELING MACHINES OF TODAY AND TOMORROW
CURRENT TUNNELING MACHINES ARE COMPETITIVE IN MAKING CIRCULAR BORES IN ROCK AS STRONG AS 25,000 PSI COMPRESSIVE STRENGTH AND IN DIAMETERS TO 20 FT. THESE MACHINES PRODUCE TUNNELS 50 TO 100 PERCENT FASTER THAN CONVENTIONAL ONES, AND SHOW TREMENDOUS SAVINGS IN PERMANENT TUNNEL LININGS. MACHINES OF THE FUTURE WILL BE ABLE TO CUT OTHER THAN CIRCULAR BORES AND BE COMPETITIVE IN MANY FORMATIONS AS STRONG AS 35,000 PSI STRENGTH AND IN SIZES EQUIVALENT TO 35 FT IN DIAMETER. PRINCIPAL DEVELOPMENT IS REQUIRED IN ROCK DISINTEGRATION, MATERIAL HANDLING, AND TEMPORARY ROOF SUPORTS. /AUTHOR/
- Record URL:
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Supplemental Notes:
- Paper sponsored by Committee on Soil and Rock Properties and presented at the 49th Annual Meeting. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
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Authors:
- Williamson, T N
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Conference:
- 49th Annual Meeting of the Highway Research Board
- Location: Washington District of Columbia, United States
- Date: 1970-1-12 to 1970-1-16
- Publication Date: 1970
Media Info
- Media Type: Print
- Features: Figures; References; Tables;
- Pagination: pp 19-25
- Monograph Title: Symposium: rapid excavation
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Serial:
- Highway Research Record
- Issue Number: 339
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Materials management; Rock fracture; Rocks; Roofs; Structural supports; Tunneling machines; Tunnels
- Old TRIS Terms: Supports
- Subject Areas: Bridges and other structures; Construction; Geotechnology; Highways;
Filing Info
- Accession Number: 00215387
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Jun 1 1971 12:00AM