Boskalis Nordic Today No.02/2018-2019

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ed to the location from a site in Dover, Eng- land, are highly suitable. The self-propelled barges Terra 1 and Terra 2, both of which have a load capacity of 660 m 3 , are also well suited to a project of this magnitude,” adds Kultalahti. 620-METRE BREAKWATER A breakwater protecting the D section on the west side of the area will also be implemented alongside the deepening of the harbour basin. The 620 metres long breakwater will be nearly 4 metres high above sea level. “This is one of the biggest breakwaters that I have worked on during my career. It will be built using of vast quantity of rock,

some of which is rock waste obtained from the underwater dredging and blasting,” continues Kultalahti. MASSIVE QUAY ELEMENTS Slipform casting for the 220 metres long quay berth to be constructed was also launched in parallel with the harbour area expansion work. A slipform casting site was established on the broad end em- bankment of the Mussalo Harbour’s A and B quay areas. “We began work on the slipform casting site in July by reinforcing the shore em- bankment, because the 53 quay elements implemented for this project are exception- ally massive. The slipform cast elements

are nearly 19 metres high, which is around six metres more than usual in this type of project ,” explains Matti Juslenius , man- ager of the slipform casting site. Early-stage slipform casting work in- cluded, among other things, reinforcement work, casting of base slabs and construc- tion of casting moulds. A total of one mil- lion kilos of reinforcement steel was used in the reinforcement work. “And, yes, there were quite a few aston- ished onlookers as the slipform casting progressed, because this impressive, near- ly 20 metres high, 300 metres long row of 300-tonne retaining wall elements and 140-tonne intermediate elements certainly attracted attention. An often asked ques-

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MASSIVE, NEARLY 19 METRES HIGH QUAY ELEMENTS, produced by slipform casting, will be installed in the quay line in spring 2019. A total of 53 elements were constructed. SLIPFORM CASTING WAS PRECEDED BY CASTING of base slabs and reinforcement work. The picture shows the lifting and installation of the reinforcements. A total of approximately one million kilos of reinforcement steel was used in the reinforcement work.

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BOSKALIS AREA NORDIC´S OPERATING PRINCIPLES ARE: WE DO WHAT WE PROMISE — RIGHT FIRST TIME — WORKING TOGETHER