A compressed air driven tunnelling machine known as the Powervane introduced by Marcon International is said to drive small diameter tunnels as cheaply as hand driving with a shield. The equipment is a fully mechanised drum digger driven by compressed air and includes a semi-oscillating cutting head motor and a hollow spool pneumatic propulsion ram. The compressed air driven cutting motor produces low-speed rotation at high torque. Spoil removal is by a rotating screw onto a belt conveyor. The compressed air system is fed by a 17 cu m/min capacity compressor which gives a 100 tonne load on the hollow spool ram at the tunnel face. (TRRL)

  • Availability:
  • Corporate Authors:

    Morgan-Grampian Limited

    30 Calderwood Street
    London SE18 6QH,   England 
  • Publication Date: 1979-9

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00310292
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Jul 22 1980 12:00AM