In 2019 we were appointed as the civil engineering and construction partner for FastNed UK. FastNed is building a pan-European network of superfast charging stations which all electric cars can use to charge.
ACS was asked to conduct excavations on gas terminals at three different sites. A number of excavations needed to be carried out on the main gas terminals at St Fergus in Aberdeenshire, Bacton in East Anglia and a large compressor site in Aberdeen.
Excavations took place over nine months including 2.5m to 3.5m deep, with the largest being 6.5m long by 4m wide by 3.5m deep.
A variety of excavation techniques were applied including vacuum, mechanical and hand excavations. We also employed penetrating radar survey equipment to establish which other services/obstructions were in the ground before any excavation works could take place. All our personnel had specific National Grid training to obtain the necessary permits as well as complying with all their health, safety and environmental procedures.
The works involved the excavations over the UK’s main live high-pressure gas transmission pipelines incorporating the above ground installations in a potentially explosive atmosphere. Detailed shoring designs had to be obtained and co-ordinated because as well as large diameter gas pipes, there were many other underground utilities in the locations. Sheet piles and frames were used to ensure the excavations were shored correctly to allow National Grid operatives safe access and egress.