Dry Dock Construction, Scotstoun

Completion of the reinstatement of the walls and cills at a dry dock at BAE Systems in Scotstoun, on behalf of our client Farrans Construction. The replacement concrete works are to accommodate a new 300-tonne flap gate within an older dry dock, to aid BAE Systems vessel docking process.

Farrans provided an arch cofferdam to withstand the forces of the Clyde River, this allowed the works to commence within the dry dock. We worked closely with their demolition sequence and temporary propping, ensuring the permanent works were constructed in sections to allow further demolition to be conducted. The base slabs were up to 3 metres in depth and carried the large pivot connections for the bottom of the gate. From the base upwards, our team aided in rebar design and produced a full temporary works solution to both dock walls, to within the design parameters of the project. This involved 5 lifts of a jump system, with the walls being formed by a single-sided system, resin anchored to the existing concrete and piles.

The walls were in total 18 metres high and had intricate exposed features and steps for guiding the gates and pulleys. Equipment pits for the winches, latches and penstock were constructed at the top of both walls. This involved complex bespoke formwork for the numerous angles, slopes, and levels according to the equipment layout.

Thanks to the collaborative efforts of our team and Farrans Construction, the project was completed on time and with a high standard of workmanship. In total, we placed an impressive 2,900 cubic metres of concrete and used 320 tonnes of rebar to bring this significant project to completion.