BORRODALE ARCH - 80-YEAR-OLD ENGINEERING WONDER

The 127 ft 6 inch long mass concrete railway bridge over the Borrodale Burn is described. It was the longest in the world of its type when constructed in 1898. Rock excavated from the nearby tunnel and cuttings was used in the construction. Further economies on shoring were achieved by a method designed by its builder, Robert McAlpine, using concrete to act compositely with the shuttering. The segmental arch has a rise of 23 ft, stands 86 ft high and springs from the solid rock on each side. Only lightweight centering was possible, the first layer was only 3 inches thick. After this had set a further 6 inch layer was placed to be followed by a 9 inch layer and successive 1 ft layers to form the final 4 ft 6 inch thickness. The concrete proved to be perfectly homogeneous. No joints were made for expansion or contraction. The arch has shown no signs of movement and is without a crack.

  • Availability:
  • Corporate Authors:

    Cement and Concrete Association

    Wexham Spring
    Slough SL3 6PL, Buckinghamshire,   England 
  • Authors:
    • Barfoot, R J
  • Publication Date: 1978-3

Media Info

  • Features: Figures; Photos; References;
  • Pagination: p. 22-23
  • Serial:
    • CONCRETE
    • Volume: 12
    • Issue Number: 3
    • Publisher: THE CONCRETE SOCIETY
    • ISSN: 0010-5317

Subject/Index Terms

Filing Info

  • Accession Number: 00182849
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Oct 31 1978 12:00AM