VolkerStevin Marine has been awarded the Tay Road Bridge pier collision protection works, a £15 million contract to ensure the bridge is not closed by a serious ship impact at the navigation spans. The project has been commissioned by Tay Road Bridge Joint Board and designed by Jacobs Engineering.
During its 45 year life span the bridge has been hit three times by shipping, each time causing superficial damage. The new works will protect against a full on impact which could result in a long term bridge closure costing the local economy an estimated £680 million.
VolkerStevin Marine has completed the ground investigation works for the project and has been involved during the final design stages. The second stage of works that have been awarded will comprise of the installation of steel tubular driven piles from a large floating crane barge and the installation of scour protection to the riverbed in the area of the pier protection works. This is carried out by placing large rocks on geotextile matting on the river bed.
The fabrication and installation of precast concrete shell units weighing between 250 and 300 tonnes each will then form the soffit and outer perimeter of the pier protection structures. These will be placed onto the piled foundations using a heavy lifting barge and will be connected together structurally using concrete, which will be placed, in several stages.
The works will be carried out from floating marine plant with a navigation channel remaining open throughout the works. This marine plant will be working in close proximity to the bridge and will be highly visible to bridge users. The road bridge will remain open to traffic and pedestrians throughout all phases of the project.