Design & build to stabilise and protect the end of the main runway at Sumburgh Airport.
The end of the runway protrudes out into the North Sea, and was being damaged by overtopping waves and washout from the seawall core during severe weather.
Works involved construction of a secant piled cut off wall, replacement of existing undersized rock armour with 24t rock armour, and regrading of the existing revetment prior to the placement concrete Xbloc units to complete the revetment works.
All works on-site were carried out airside in accordance with required airside procedures, passes and restrictions. We established a precast concrete production yard outside the 70m airside exclusion zone. This permitted us to progress with production of 1,700 Xbloc units, permitting 24 hour access and working as required. Rock units up to 24t were imported to Shetland by barge from Norway.