Facts and Figures

Port of Naantali Ltd


Terramare Oy

Port of Naantali jetty extension | Client: Port of Naantali Ltd

Port of Naantali is increasing its quay capacity by extending to 228 metres its RoRo jetty, which is equipped with driving ramps. Terramare has implemented the jetty extension in exceptionally deep water.








Project’s significance
Port of Naantali is extending its RoRo and RoPax jetty to accommodate larger vessels. The project will support, in particular, the Finnlines shipping company’s plans to develop and expand its traffic between Finland, the Åland Islands and Sweden.

Project’s implementation
Terramare is implementing the extension of the Port of Naantali’s jetty by 94 metres. The jetty’s total length will then be 228 metres. The extension has been founded on 39 concreted steel pipe piles, of which the longest were 54 metres, due to the deep water and a thick bottom layer of clay. The piling was carried out using Terramare’s modernised Meri-Pekka vessel.

The concrete structures of the jetty extension will be implemented in three stages. On top of the footings cast over the pilings will be installed 16 prefabricated 50-tonne beam elements. On top of the beams will be installed steel corrugated sheets, over which, ultimately, the deck slab will be cast. Approximately 32.5 tonnes of concrete reinforcement and 3,500 cubic metres of concrete will be used in the concreting work. The jetty extension will be delivered fully equipped, including fenders, bollards, ladders and edge barriers as well as preparations for electrical installations to be implemented later. Public utility services including water and wastewater piping will also be installed in the jetty.

Work stages
The contract includes seaward piling work, concreting work, quay surfacing and accessory installations.

Read more about this project in the issue 02/2017-2018 of Boskalis Nordic Today.