Design and construction of bridges for the SH2 Dowse to Petone upgrade, Wellington

The NZ Transport Agency (NZTA) is currently constructing a major improvement to the Wellington road system with the upgrade of SH2 in the Dowse to Petone area of the Hutt valley. Beca was awarded the investigation and design of this project in the mid-1990's and Fletcher Higgins Joint Venture was awarded the main construction contract in 2007. The project will provide four traffic lanes on an improved alignment with a grade separated interchange and over bridges allowing existing signalised junctions to be removed, and will improve safety and reduce congestion on this important link. The design and construction solutions for the upgrade not only had to meet the goals of the NZTA, but they also had to be responsive to the natural and man-made constraints that surround the site. Geographically, this section of SH2 is immediately adjacent to the Wellington Fault and shares a narrow strip of land with Hutt Road and the Melling and Wairarapa rail lines. These challenges have been met by extensive use of precast bridge girders that allow safe and rapid construction of the bridges despite their complex geometry. In addition, careful attention has been paid to programming and sequencing to ensure the works are able to be carried out with minimal disturbance to traffic and the community. This paper outlines the bridge design and construction solutions and showcases some innovative ways of dealing with the problems that may be encountered on geographically difficult sites in built-up urban environments.

Language

  • English

Media Info

  • Pagination: 13p
  • Monograph Title: Innovation in engineered wood product bridge components

Subject/Index Terms

Filing Info

  • Accession Number: 01384468
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Aug 22 2012 4:35PM