Enhanced ground bearing under reinforced soil abutments

A new bridge was constructed to replace the corroded Barnhalt Bridge, Carrickfergus in Northern Ireland, UK. The bridge carries Taylor's Avenue over the Belfast to Larne railway line. The bridge consisted of TY10 beams infilled with concrete, supported by bankseats resting on the abutments. The bridge abutments were located 4m from the railway, which was carried on an embankment over a drainage ditch. The abutments and embankments and their foundations were designed by F P McCann Ltd. The geology of the area was glacial till (boulder clay) overlying Mercia Mudstone. Moisture contents for the boulder clay were generally greater than the plastic limit and those for the mudstone were slightly less. The bearing pressures under the abutment were assessed using the method set out in BS 8006. The factored pressure on the base was calculated as 25% greater than the allowable value. The solution adopted was to supplement the toe of the abutment with a pile cap with a similar plan dimension to that of the bankseat and lying directly below it. A study of bottom-driven steel-shell displacement reinforced concrete piles was installed by Larsen Foundations Ltd.

  • Availability:
  • Authors:
    • BELL, B
    • SMITH, A
    • EDDIS, R
  • Publication Date: 2007-3-6

Language

  • English

Media Info

  • Pagination: 26-7
  • Serial:
    • Structural Engineer
    • Volume: 85
    • Issue Number: 5
    • Publisher: Institution of Structural Engineers
    • ISSN: 1466-5123

Subject/Index Terms

Filing Info

  • Accession Number: 01061055
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Sep 10 2007 2:09PM