Design and construction of the New Mangere Bridge
The New (Duplicate) Mangere Bridge is a 646m long, 21.5m wide motorway bridge currently being constructed using balanced cantilever techniques alongside the existing crossing of the Manukau Harbour between Mangere and Onehunga on State Highway 20, Auckland. The bridge design and construction is carried out for the New Zealand Transport Agency (NZTA) by the Manukau Harbour Crossing Alliance (MHX - Fletcher Construction, Beca Infrastructure, Higgins and NZTA) after the alliance was successful in a competitive TOC (Target Outturn Cost) process involving two alliance teams. The bridge design employs twin (linked) cast-in-situ box girders with 100m main spans, the superstructure being continuous from abutment to abutment, and supported on flexible piers which allows the elimination of bearings on the main piers. Particular attention is given in the design and during construction to achieving the desired whole-of-life performance and durability of the completed structure This paper describes the background and rationale behind the design concepts implemented in the final design and the construction techniques being used to achieve completion by the required 2011 completion date.
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Authors:
- King, R
- Dickson, A
- Parfitt, A
- Pretorius, J
- Conference:
- Publication Date: 2009-5
Language
- English
Media Info
- Pagination: 14p
- Monograph Title: Innovation in engineered wood product bridge components
Subject/Index Terms
- TRT Terms: Box girders; Bridge construction; Bridge design; Bridges; Cantilevers
- Geographic Terms: Auckland, New Zealand
- ATRI Terms: Box girder; Bridge construction; Bridge design; Cantilever
- Subject Areas: Bridges and other structures;
Filing Info
- Accession Number: 01384415
- Record Type: Publication
- Source Agency: ARRB
- Files: ATRI
- Created Date: Aug 22 2012 4:34PM