Bam Nuttall has won the contract for a new 75,000m² concrete deck extension at London City Airport.
The deck is the first stage of construction for the £480M airport development, which will include aircraft stands, a parallel taxiway and a passenger terminal extension.
The £85M piling and decking contract includes extending the airport’s concrete deck out over the King George V Dock supported by over 1,000 concrete piles with steel casings – each approximately 20m in length.
The new deck will consist of precast reinforced concrete planks with a reinforced concrete topping spanning onto precast concrete beams supported on more than 1,000 large diameter bored concrete piles with steel casings in the dock bed (typically spaced at 10m centres). Average water depth is around 10m with the average pile length being approximately 20m.
Additional work includes the partial demolition of the King George V Dock wall to enable tying in of the new deck, construction of a partly submerged service trough and drainage channels, and approximately 50 land based piles adjacent to the airport entrance.
BAM Nuttall executive director Martin Bellamy said: “We are delighted that Bam has been selected to deliver such a major marine civil engineering project that draws on our relevant expertise and experience.
“This scheme will play a significant part in the overall Airport Development Programme and will support the planned infrastructure such as the aircraft stands and new world class passenger terminal extension.”
The airport’s development programme will bring improved facilities for customers, an expanded offer of flights, and greater space to accommodate increasing passenger numbers from the current 4.5M to 6.5M.
London City Airport chief development officer Peter Adams added: “The contract is the first big step forward in the airport’s development programme, essentially creating new land that will provide the base upon which we will build the majority of the transformational infrastructure, including the extended terminal building and additional aircraft stands.
“Bam has proven expertise and experience in these techniques and we are really pleased they are on board to deliver this project alongside the overall delivery partner, Bechtel.”
Works will start in the Spring, once the unexploded ordnance (UXO) survey is complete - which recently discovered a 500kg Second World War device.
The work will take place while the airport remains operational with completion of the deck expected in early 2020.