Irvine Bridge of Invention - Spencer Group

Irvine Bridge of Invention

This 60m span ‘retracting’ bridge structure – providing an opening for navigation of 18m – is believed to be the longest of its kind in the world.  It delivered a range of benefits – requiring a reduced level of marine piling and embankment works –  over the original design, together with reduced wind loading when in the open position: a major factor on the exposed marine estuary.

The project involved Spencer in driving large tubular steel piles of 2000mm diameter utilising the company’s own piling operatives and self-propelled piling barge the ‘Meeuw’. The barge was also used to transport and install – utilising high-lift jacks – large prefabricated sections of the bridge across the estuary to the north bank of the estuary where there was no access for heavy lift.

 Key project details

  • •  Construction of 60m retractable bridge
  • •  Providing an opening for navigation of 18m
  • •  Driving of 2000mm diameter piles
  • •  Prefabricated bridge sections