EXPERIMENTAL VERIFICATION OF A PNEUMATIC TRANSPORT SYSTEM FOR THE RAPID EXCAVATION OF TUNNELS. PART II. TEST PROGRAM

This study is the final phase of a muck pipeline program begun in 1973. The objective of the study was to evaluate a pneumatic pipeline system for muck haulage from a tunnel excavated by a tunnel boring machine. The system was comprised of a muck preparation unit, solids feeder and air blower, telescoping pipes and 500 feet of 10-inch diameter pipe. The system transported up to 100tph of simulated tunnel muck with maximum sizes ranging from 1/2 inch to more than 3 inches. The system components were tested for reliability and flexibility, wear and maintenance requirements, capacity, noise and dust levels, effect of moisture content, extensibility, and power requirements. The system was found to be low in capital cost, easy to operate, and readily extensible. The pneumatic pipeline was power-intensive and susceptible to elbow wear. For the pneumatic transport of coarse muck, moisture content was more important than particle size. Noise levels were high at the blower and muck preparation unit but could be reduced in actual practice. The system was found to be reliable except for the elbow wear.

  • Supplemental Notes:
    • See also report dated January 1978, PB-281103, and Part 1, PB-295031.
  • Corporate Authors:

    Colorado School of Mines

    1500 Illinois Street
    Golden, CO  United States  80401

    Transportation Systems Center

    55 Broadway, Kendall Square
    Cambridge, MA  United States  02142

    Urban Mass Transportation Administration

    400 7th Street, SW
    Washington, DC  United States  20590
  • Authors:
    • Martin, J W
    • Faddick, R R
  • Publication Date: 1978-12

Media Info

  • Pagination: 154 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00197446
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: DOT-TSC-UMTA-78-50 Final Rpt.
  • Contract Numbers: DOT-TSC-1144
  • Files: NTIS, TRIS, USDOT
  • Created Date: Jul 31 1979 12:00AM