Current status: Answered by Fiona Hyslop on 17 December 2024
To ask the Scottish Government what its position is on whether the root cause of the structural problem with the M8 Woodside Viaducts was due to movement in the supporting pillars caused by a change in the water table, which was triggered by nearby construction activity at Phoenix Road.
Transport Scotland engineers advise that there is no reason to believe that there has been any structural damage to the Woodside Viaduct as a result of a changing water table due to construction or any other activity at Pheonix Road.
The works are as a result of deterioration of the crosshead half joints, which are supported on top of the piers (pillars). Half joints are a detail susceptible to deterioration due to water ingress and are not utilised in new bridge construction as a result.