Drive and extract a 6.5 meter diameter monopile

DRIVE AND EXTRACT A 6.5 METER DIAMETER MONOPILE

In 2019, a CAPE VLT-320 Tandem was used to drive and extract a 6.5 meter diameter monopile of 60 meter length and weighing 330 ton on the Hollandse Kust Zuid Offshore Wind Farm off the Dutch coast.

As part of a new motion compensated gripper frame test with Dynamic Positioning installation the CAPE VLT was used as the pile had to be removed after installation and offered the opportunity to perform the test multiple times.

Application details

Application
Monopile installation and extraction
Pile type
Monopiles
Water depth
20m
Penetration
16m
Extraction
16m

PILE DETAILS

Pile type
Monopiles
Pile length
56,6m
Pile weight
586t
Pile wall thickness
60-75mm
Pile diameter
6,5m
No. of piles
1

PROJECT DETAILS

Period
October 2019
Sea
North Sea
Country
Netherlands
Location
Hollandse Kust Zuid
Market
Offshore Renewables
System/end usage
Installation and decommissioing test
Operator or end customer
Seaway 7
Installation contractor
Seaway 7
Type of vessel
Floating Heavy Lift Vessel
Name of vessel and owner
Seaway Strashnov, Seaway 7
Mode
Dynamic Positioning

Main Reasons for solution choice

EXTRACTION POSSIBLE

LOW NOISE EMISSION

IN COMBINATION WITH DP OPERATED VESSEL THE FASTEST WAY OF INSTALLING MONOPILES

SELECTED EQUIPMENT

CAPE VLT-320

Equipment configuration
CAPE VLT-320 Tandem
Eccentric moment
640kgm
Max. line pull
1,000t
hero_desktop_2880x1620_P0222 – Motion compensated gripper test Hollandse Kust Zuid_2 hero_mobile_1200x2400_P0222 – Motion compensated gripper test Hollandse Kust Zuid_2

offshore
vibro
technology

Discover how its unique features will uplift your next project; download the offshore vibro technology guide.

YOU MIGHT BE
INTERESTED IN