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| South Rangitikei viaduct New Zealand |
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Bild und Text von Peter McGavin |
The 4th highest viaduct in New Zealand (also the 2nd longest viaduct in New Zealand) is the 78 m high, 315 m long, South Rangitikei viaduct spanning the Rangitikei River. It is the southermost of the 3 large viaducts on the Mangaweka Deviation, opened in 1981, between Mangaweka and Taihape on the North Island Main Trunk Line. It is an impressive all-concrete structure with twin-shafted vertical piers carrying a continuous prestressed hollow box superstructure of six spans. It incorporates an earthquake resistant feature that is unique in New Zealand and rare in the world. In an earthquake the pier bases could lift up to 13 cm to allow energy and pressure to shift from one pier leg to the other. The rocking action is controlled by large "energy dissipaters" installed in the pier bases. |
