Latest Issue
 
Windtech International September October 2024 issue

 

FOLLOW US AT

follow

 

follow


Berm scour tests conducted at HR WallingfordHR Wallingford has been helping Ørsted to build stable cable crossings for their new Walney Extension windfarm, on what is becoming an increasingly congested seabed. The most recently constructed Round 3 UK wind farms are experiencing a new phenomenon: a congested seabed with a complex network of existing cables and pipelines that new ones must cross in order to make it to land.
 
At Walney, the four existing wind farms in Morecambe Bay, along with gas pipelines and cables, meant that there were eight obstacles in the way. To get over these obstacles, it was necessary to bring the buried cables up out of the seabed, over the existing asset, and then rebury them, normally securing the exposed cabling with a cover of rock - a rock berm. However, rock berms can sometimes be problematic, causing large holes to be scoured in to the seabed that can extend hundreds of metres from the structure. This scour can expose the existing assets and can lead to expensive repair bills. HR Wallingford carried out scour tests for Ørsted in its Fast Flow Facility, which is able to re-create realistic marine conditions in the laboratory. An assessment of the as-built footprints relative to the design was also conducted.
 
Use of cookies

Windtech International wants to make your visit to our website as pleasant as possible. That is why we place cookies on your computer that remember your preferences. With anonymous information about your site use you also help us to improve the website. Of course we will ask for your permission first. Click Accept to use all functions of the Windtech International website.