DUDGEON, RACE BANK AND GALLOPER OFFSHORE WIND FARMS
THROUGHOUT THESE PROJECTS, MAMMOET PERFORMED OVER 4,000 TRANSPORT OPERATIONS AND EXECUTED OVER 3,300 LIFTS.
M ammoet executed the handling a topside to be used on the Dudgeon, Race Bank and Galloper offshore wind farms. The company provided a multi-service operation, involving the load-in and load-out, transportation and general handling of hundreds of offshore wind components. With some rotor blades as long as 75m and nacelles as heavy as 360t, Mammoet adopted a ro-ro process (where possible) instead of lifting, to provide a safer and more cost-effective method. A range of equipment was used to carry and pre-assembly of offshore wind components, comprising of imported towers, nacelles, blades, a jacket and
maneuver them into place. The Mega Jack 800 held the jacket in place whilst the suction buckets were welded to the jacket by the customer’s operatives. The success of the project depended upon the high-level engineering and design works carried out by SLP and Mammoet and close collaborative working with STDL to get the jacket ready for planned sail away on schedule. Taken together, these three projects, Mammoet performed over 4,000 transport operations and executed over 3,300 lifts, with a combined handling weight of 58,000t. Combined, these three projects power over 1.2 million UK homes in total.
out this complex scope of work, including SPMTs and specialist cranes: the LR1750/2 with 750t capacity, the LR1300 with 300t capacity and a telescopic crawler crane with 120t capacity. Meanwhile, Mammoet was given the scope of rolling-up, jacking-up, and loading-out a jacket and topside at the Dudgeon Offshore Wind Farm fabrication site in Lowestoft, Suffolk. These operations were part of the construction of an offshore facility, comprising of a topside and jacket structure. Mammoet used its award-winning Mega Jack 800 system to jack-up a 954t jacket to 14m high. During the project Mammoet lifted hundreds of components using cranes,
telehandlers and chain blocks. The site moves were also performed using 16 axle lines of SPMT in a configuration of 4 file 8. One of the most critical scopes of the project involved the roll-up and jack-up of the jacket. Prior to the roll-up operation, four jacking towers were set-up with the first layer of bracing, which saved several days of set-up and installation time. The roll-up was carried out using Mammoet’s AK912 and LR1600-2 cranes. The jack-up operation took place one day after the roll-up. To perform the jack-up, suction buckets were positioned under each of the jacket legs and SPMT trailers were used to
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