The brick arch bridge carrying the a4 trunk road over the main western region railway at Sommming Cutting was extensively repaired during 1971 after settlement of an abutment. However, it was decided to build a new bridge and studies of possible designs were made in 1972. The paper describes the reasons for adopting a post-tensioned continuous box girder, constructed by the incremental launching system, an innovation for British engineers. The bridge was constructed on a short casting bed, successively in nine lengths of 9.6 M, with a steel launching nose stressed to the leading section. It was launched in nine stages by jacking across the railway on temporary stainless steel bearings using composite steel and rubber pads, with ptfe sliding surfaces. The paper describes the design, structural analysis, contractual arrangements and construction methods. /Author/TRRL/

Media Info

  • Features: Figures; Tables;
  • Pagination: p. 83-102
  • Serial:
    • Volume: 64

Subject/Index Terms

Filing Info

  • Accession Number: 00179924
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Part 1
  • Files: ITRD, TRIS
  • Created Date: Oct 12 1978 12:00AM