Jumbo has completed the TP-installation for the Anholt Offshore Wind Farm, off the Danish coast. The DP2 heavy lift vessel Jumbo Javelin installed 111 TPs with an installation rate of three TPs per day.
The transport, installation, access to the TPs and grouting was done without any Lost Time Injuries (LTI=0).
Scope of Work
The scope of work included transport and installation of 111 TPs. The TPs, weighing up to 180 t each, were loaded in Aalborg, Denmark, and transported to the offshore location on board the Jumbo Javelin. At the field the heavy lift vessel positioned itself on DP and lifted the TPs from its hold to place them on the pre-installed monopiles. Anholt Offshore Wind Farm is being built by DONG Energy. Jumbo was contracted by the Danish contractor MT Højgaard, who is in charge of the foundation installation work.
Equipment
During mobilisation from the end of March till mid April 2012 the Jumbo Javelin was outfitted with job-specific equipment, amongst others a motion compensated walkway to provide safe access to the TPs (Ampelmann), a grout plant (Densit) and the company’s new temporary accommodation unit. This offshore approved unit accommodates up to fifty persons and can be placed on all Jumbo’s J-type vessels. The Jumbo Javelin was also equipped with in house developed passive heave compensators (with a 2.5 m stroke and a Safe Working Load of 300 t) and two job-specific, remote operated spreader bars to lift the TPs.
Nine TPs At Once
The Jumbo Javelin can carry up to nine TPs at a time, stowed vertically in the hold. The vessel is free floating, uses its DP2 system combined with a newly installed Taut Wire reference system to position itself, has a transit speed of up to 17 knots and is able to sail with open hatches.
