THREE RAILWAY BRIDGES IN PRESTRESSED CONCRETE

TRES PUENTES DE FERROCARRIL DE HORMIGON PRETENSADO

The characteristics of three prestressed concrete railway bridges are described. Firstly the conclusions relating to the design of railway bridges are mentioned, and the three bridges in question are reviewed. A railway bridge differs from a road bridge in two fundamental points: (a) the live load is much greater; (b) such live load is fixed in a given direction, whereas in the case of a road bridge the load can be distributed in any manner. In the calculation of a railway bridge, it is essential to take account of the following: (1) the best adapted section is the double "T"; (2) the presence of the railway influences the morphology of the bridge; (3) the permanence of the live load on a line facilitates the distribution of the materials in a transverse section in order to accommodate it; (4) these bridges are not as slender as road bridges; (5) the increase of live load constitutes an advantage during construction. Three bridges constructed at Gerona are discussed, on the Guadalimar river, and the Villaverde-Vicalvara viaduct, across the Manzanares in Madrid. The construction methods of the bridge over the Guadalimar for the Linares-Almeria line and the bridge characteristics are emphasized: (A) launching; (b) construction area; (C) thrust rams; (D) neoprene-teflon launching slides. Paper presented to the symposium on prestressed concrete railway bridges at the Eduardo Torroja Institute, Madrid, May 1975.

  • Corporate Authors:

    Instituto Eduardo Torroja

    Costillares, Chamartin
    Madrid 33,   Spain 
  • Authors:
    • MANTEROLA, J
    • Fernandez, L
  • Publication Date: 1976-1-3

Language

  • Spanish

Media Info

  • Features: Photos;
  • Pagination: p. 41-52
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00182843
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Oct 31 1978 12:00AM