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References
Waiwera Viaduct
New Zealand
Prestressed concrete bridge with 8 spans (48 + 4x76 + 68 + 61 + 33). Total length: 514 m. Built using the balanced cantilevering method. The Waiwera Viaduct was constructed as two independent structures, which have a separation varying from 2.5 m to 11 m. The variable separation was necessary to split the northbound and southbound lanes before entering the tunnels, which are situated immediately north of the viaduct.
![]() Waiwera Bridge, New Zealand The bridge superstructure is the tried and tested pre-stressed concrete box girder and was constructed using a precast segmental balanced cantilever method using an overhead gantry. This method was chosen since it allowed the superstructure to be constructed without access from ground level; the ground is off-limits in case habitats are disturbed or damaged.
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