BEILEN, the Netherlands – CAPE Holland’s vibro lifting tool, the CAPE VLT-640 Triple, has completed work at RWE’s 342-MW Kaskasi II Offshore Wind Farm development in the German North Sea.
Preparations started in 2016, way ahead of the contract award from installer Seaway 7 in 2020.
According to CAPE Holland, the tool contained numerous innovations. For this project, flanged monopiles have for the first time been upended, lifted and vibrated, using a patent-pending flange clamping system.
Seaway 7 has also used the CAPE VLT to drive a new type of monopiles with self-expanding pile shoe. Although the monopiles where not vibrated to end depth, a newly developed monitoring, logging and survey system has been deployed to collect data and deliver insights.
Wouter van Dalen, senior project manager at Seaway 7 said using the CAPE VLT to upend and install monopiles in a single lift to stable penetration depths led to reduced installation times and risks.
The tool will be deployed at another wind project offshore Europe later this year, upending and partly installing flanged monopiles, followed by a first offshore wind deployment in Japan.