ROLE OF THE TUNNELING MACHINE

TUNNELING MACHINE DESIGN PRESENTS MANY PROBLEMS WHICH ARE, FOR THE MOST PART, NOT RELATED TO ROCK FRACTURE, BUT RATHER WITH CRITERIA ASSOCIATED WITH OVERALL OPERATION. TUNNELAR DESIGN MUST BE SUCH THAT IT IS AN INTEGRATED PART OF THE GROUND SUPPORT, LINING, AND MATERIAL HANDLING SYSTEMS. THE PROBLEM OF NOISE AND SAFETY AS WELL AS TEMPORARY AND PERMANENT GROUND SUPPORT SYSTEMS ARE CONSIDERED. PROBE DRILLING, MUCK HANDLING AND TRANSPORT, AND OTHER BACKUP SYSTEMS ARE DISCUSSED. FACTORS THAT DETERMINE THE PERFORMANCE OF THE TOTAL TUNNELING SYSTEM ARE REVIEWED. FIGURES ILLUSTRATE HOW BECAUSE OF IMPROVED ROCK CUTTER DESIGN, THE SPECIFIC ENERGY REQUIRED TO FRACTURE THE ROCK HAS DECREASED OVER THE LAST DECADE, AND ALSO HOW THIS IS IMPROVING PENETRATION RATE. TUNNELER AVAILABILITY AND BACKUP SYSTEM CAPABILITY ARE DISCUSSED. THE 6 M LONG 18 FT 4 IN DIAMETER TUNNEL BORED UNDER LAKE HURON IS DESCRIBED TO ILLUSTRATE THE RESULTS OF AN OVERALL INTEGRATED TUNNEL BORING SYSTEM. THE REQUIREMENTS OF THE SYSTEM AND A SYSTEM DESCRIPTION IS PROVIDED. A COMPUTER PROGRAM WAS ESTABLISHED TO RECORD AND TABULATE PROGRESS AND PERFORMANCE OF THE BORING SYSTEM AND A TYPICAL DAILY COMPUTER RUN IS PRESENTED. THE PERFORMANCE OF THE TUNNELER AND BACKUP SYSTEM IN TERMS OF FEET BORED, PENETRATION RATE, ADVANCE RATE, TUNNELER AVAILABILITY AND SYSTEM UTILIZATION ARE PLOTTED MONTHLY OVER THE LENGTH OF THE JOB AND SHOWN IN FIGURES. INTERESTING STATISTICS ON THE PROJECT ARE ALSO PRESENTED. AN ATTEMPT HAS BEEN MADE HERE TO SHOW THAT TUNNELAR PENETRATION RATE ALONE WILL NOT RESULT IN AN INCREASED ADVANCE RATE.

Media Info

  • Features: Figures; References;
  • Pagination: p. 1093-11
  • Serial:
    • Volume: 2

Subject/Index Terms

Filing Info

  • Accession Number: 00236579
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 31 1974 12:00AM