Strengthening of railway PSC bridges in lieu of replacement

In the late 1990's, Queensland Rail (QR) undertook to upgrade its Blackwater to Gladstone coal corridor from M160 to M270 capacity, a 70% design load increase. The strengthening of the bridges on the corridor was an essential prerequisite to QR upgrading its coal wagon fleet from 80 tonne to 104 tonne gross QR's in-house civil engineering design section developed a design to strengthen the 15m prestressed concrete (PSC) spans on 33 bridges on the corridor, and called several tenders for this work. The successful Contractors submitted three innovative alternative designs to strengthen the existing spans with steel or concrete composite sections. This paper describes the essential features of the original and alternative bridge strengthening designs, as well as some of the construction problems encountered. The strengthening of the bridges in lieu of girder replacement saved significant operational costs and minimised interruptions to railway traffic.

Media Info

  • Pagination: 9p. ; PDF
  • Monograph Title: Cost efficient railways through engineering: CORE 2002: conference on railway engineering, November 10-13 2002, Wollongong, New South Wales, Australia

Subject/Index Terms

Filing Info

  • Accession Number: 01532060
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Jul 29 2014 11:53AM