SUPPRESSION OF NOISE AND VIBRATION ON LONDON TRANSPORT'S UNDERGROUND LINK WITH HEATHROW AIRPORT

To reduce noise concrete trays supported on rubber blocks were used to carry the first mile of track. The track-trays weigh 20 tons and are manufactured on site. The rubber bearing-pads incorporate reinforcement layers of steel plate, are in five sizes. The trays which are 10-ft 10-ins wide and 22-ft 3-in long, are laid at 25-ft centers longitudinally and the remaining 2-ft 9-in gap between the trays is cast in situ. Projecting reinforcing bars from the ends of the trays are provided for this purpose and, by this means, continuous track-deck lengths of about 600-ft are laid, 3-in gaps being left at these intervals to allow for thermal expansion.

  • Availability:
  • Corporate Authors:

    Broadfields (Technical Publishers) Limited

    Little Leighs
    Chelmsford, Essex CMB 1PM,   England 
  • Publication Date: 1974-7

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00072768
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Jan 16 1975 12:00AM