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REIDsteel

Structural Steel Design & Fabrication

Interserve Bridge - UK

Skewed and Cambered 45m clear span bridge

We were employed to design, supply, and install this skewed,

cambered 45m clear span bridge to provide suitable vehicle and

pedestrian access to a new biomass power plant in the UK.


We used 3D BIM technology to share a detailed model of the bridge

design with other contractors so that they could accurately design

and prepare the abutments and foundations. This was vital as t here

was less than 100mm of spare room on each side of t he bridge.


We designed and fabricated this at our premises in Christchurch and it

was assembled on site, then lifted onto the abutments. To safely and

accurately lift such a gigantic structure onto its abutments required

the use of specialised cranage and equipment. This meant that

we had to design and fabricate with the lift in mind, as it had to be

planned in meticulous detail to ensure nothing went wrong.


Once the bridge was assembled, the massive LG 1750 crane, and

rigging equipment, was brought to the site in sections by an army of

vehicles and an expert team of riggers and operators from Osprey Ltd.

The ‘Big Lift’ needed to be conducted over the River Don and near a

major heavy goods railway line running adjacent to the lift zone. This

required us to liaise with both the Environment Agency and Network

Rail.

The bridge was attached to the lift rigging equipment and steadily

raised off the assembly blocks to 6 meters into the air. It was then

gradually swung across the site to the correct position and slowly

lowered so that the milled steel cones found their location holes in the

foundations and guided the bridge down into its final precise position.

We then bolted the bridge to the foundations and removed the strops.


The old, dilapidated bridge was lifted and placed in the assembly area

that had been used to construct the new bridge, where it was left to

be cut up and taken away for scrap recycling.

This specialist lifting operation was carried out wit hin a day, leaving

the site free to resume work and the concrete road surface to be

poured.


Ref: 118319-G51

REIDsteel Elements
Structural Design & Detailing .
Primary Steel .
Fabrication .
Packing & Delivery .
Installation .
A 3d model of a bridge with a play button.
Gary Christian • September 29, 2016
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