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