China Railway Major Bridge’s ICE 170NF tandem vibro set has been working on installing wind turbine foundations in Guangdong’s Yangjiang area since June. This fast and silent installation method is again very successful.
Yuedian Yangjiang Shaba Windfarm
Installation capacity: 300MW
Tripod and Four-legged jacket foundation
Turbines 5.5 and 6.45MW
This offshore vibro piling method was chosen in line with the soil conditions. The water depth in this area is 23-27 meters, and the conditions are unsuitable for impact hammering: first, a 25m soil layer, followed by hard layers that require drilling. The ICE 170NF-tandem was selected to drive the 2940mm diameter, 51-58m long casings (with a weight of around 80 tonnes) right up to the hard layer, after which a drill emptied rock and soil from the piles. Steel piles were then inserted in the sockets and secured in place with concrete. The outer casing was then cut off at seabed level, and the jacket foundation was positioned and installed on the foundation.