Third River Don Crossing

  • Year: 2014
  • Location: Aberdeen, Scotland
  • Client: Aberdeen City Council
Download Case Study

Requirement

A single bridge spanning the River Don in Aberdeen. The new bridge is predicted to provide most significant traffic reduction in the immediate vicinity of the existing Don crossings by aiding the redistribution of traffic to alleviate congestion.

Solution

Scope of Cleveland Bridge work Fabrication, application of protective treatment to the bridge, site erection and site application of protective treatment. The bridge itself comprised of a pair of splayed leg portal frames of trapezoidal box girders construction supporting a road deck. Spacing between abutments was 91.72m. The construction joints were arranged to provide two side span elements each 28.375m long, and a main span element 34.97m long. The splaying legs of each side span were assembled to the deck on site.

Challenges

Due to the shape of the bridge it was difficult to restrain in the temporary condition. Trestles were used to support the side span and main span elements in their offline position. Stools were used to support the splaying legs whilst they were being welded to the side span in their offline position. In the final position tie downs at the abutments were used to restrain the bridge and the splayed legs were laid on the trust blocks on packers until the void had grout positioned and Macalloy bars tensioned. As the central span to the side span main site splice was to be added over water, suspended scaffold was required to complete these welds.

Outcome

Single bridge spanning the River Don in Aberdeen. The new bridge is predicted to provide most significant traffic reduction in the immediate vicinity of the existing Don crossings by aiding the redistribution of traffic to alleviate congestion.

Got a project? Let's talk.

  • This field is for validation purposes and should be left unchanged.

Stay up to date with the latest CBUK news