EXPERIMENTAL VERIFICATION OF A PNEUMATIC TRANPSORT 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. Related reports have been issued, namely: "Pneumatic-Hydraulic Material Transport System for Rapid Excavation of Tunnels," DOT-TST-75-17; "Experimental Verification of a Pneumatic Transport System for the Rapid Excavation of Tunnels, Part I: Installation of Test Facility," DOT-TST-76-63; and "Transportation of Tunnel Muck by Pipeline," UMTA-MA-06-0025-78-4. Loan copies are available from the Transportation Systems Center, Kendall Square, Cambridge, Massachusetts 02142. /UMTA/

  • Availability:
  • Supplemental Notes:
    • Appendixes herein are: A--Airstream Velocity Profiles; B--Capacity Test Results and Screen Analyses; C--Weights in kg for Bend Liners for 1977 Wear Test; and D--Report of New Technology.
  • Corporate Authors:

    Colorado School of Mines

    Division of Engineering, 1500 Illinois Street
    Golden, CO  United States  80401
  • Authors:
    • Martin, J W
    • Faddick, R R
  • Publication Date: 1978-12

Media Info

  • Pagination: 157 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00195568
  • Record Type: Publication
  • Source Agency: Urban Mass Transportation Administration
  • ISBN: MA-06-0025
  • Report/Paper Numbers: UMTA-MA06-0025-78-14Final Rpt.
  • Contract Numbers: DOT-TSC-1144
  • Files: TRIS, USDOT
  • Created Date: Jul 31 1979 12:00AM