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1.15 Thorndon Overbridge - New Zealand

  • Thorndon overbridgeThis project required the seismic assessment, design and contract administration of a seismic retrofit scheme for a major 1.3 km long arterial bridge.

  • A seismic assessment was completed and bridge vulnerabilities to earthquake loads identified.

  • Geotechnical assessment of liquefaction risks was undertaken and investigations carried out to locate the Wellington Fault which passes under the bridge.

  • Linkage deficiencies were considered and a linkage bolt retrofit scheme developed.

  • World first 'catch frames' were developed to mitigate against the loss of spans in the event of fault movement (5 m lateral).


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