Fractures have been observed in the lateral prestressing bars of prestressed concrete railway T-girder bridges, built by the post-tensioned structural system. They were caused by stress corrosion, owing to inadequate grouting. Systematic investigations were then carried out on all bridges of this type, by random examination of the grouting where possible, and by field radiography using an iridium-192 gamma ray source. Inadequate grouting of the bars inside the sheaths, allowing air and moisture to enter, was found in many cases. The report gives an account of this inspection, together with a study of the causes of inadequate grouting, suggestions for improvements, and a very short discussion on the respective merits of solid prestressing bars or wire tendons.

  • Corporate Authors:

    Japan Railway Civil Engineering Association

    Kyodo Building, 18-7 Hagashi-Uyeno 2 Chome, Daito-Ku
    Tokyo-110,   Japan 
  • Authors:
    • TAMURA, S
  • Publication Date: 1974-6

Media Info

  • Features: Figures;
  • Pagination: p. 9-30
  • Serial:
    • Permanent Way
    • Volume: 15
    • Issue Number: 4
    • Publisher: Japan Railway Civil Engineering Association

Subject/Index Terms

Filing Info

  • Accession Number: 00095218
  • Record Type: Publication
  • Source Agency: International Railway Documentation, Selection of
  • Files: TRIS
  • Created Date: Jul 24 1975 12:00AM