Xbloc - Effective ware protection for breakwaters and shores

Breakwater Swinoujscie LNG terminal, Poland

At Swinoujscie an LNG terminal is being constructed. The 3 kilometre long breakwater required for this terminal is built by a joint venture of Boskalis, Hochtief, Per Aarsleff and Doraco.

The breakwater consists of a steel cofferdam structure with Xbloc concrete armour on a rock core on the outside.

On the main breakwater Xblocs of 5, 2.5 and 1 m3 will be applied. The Xblocs are cast in the port of Swinoujscie. 

The Xblocs are transported by barge to the inside of the breakwater and are subsequently placed by hydraulic excavators.

Model testing has been carried out in the laboratory of Delta Marine Consultants in Utrecht, Netherlands.

Project Milestones

Start of casting: August 2011
Trial placement: September 2011
Start of placement 1 m3 Xblocs: September 2011
Start of placement 2.5 m3 Xblocs: October 2011

Project Details

Hs: 4.0 m
Length of breakwater: 3 km
Size of Xblocs: 1, 2.5 and 5 m3
Number of units: 27,500

Project pictures

  • Stack of three rows of 1 m3 Xbloc
  • Xbloc casting yard, Port of Swinoujscie
  • Overview Breakwater Swinoujscie LNG
  • Xbloc load out, Port of Swinoujscie
  • Placement of 2.5 m3 Xblocs at Swinoujscie Poland
  • Supply of 2.5 m3 Xblocs by barge at Swinoujscie Poland
  • Xbloc breakwater at Swinoujscie covered with ice
  • Xbloc breawater at Swinoujscie under construction
  • Xbloc placement at Swinoujscie LNG using marine equipment
« back to overview