Wind turbine size and power are increasing quickly and consequently loads on wind turbine foundations have been doubling in roughly the past eight years. Higher loads would imply higher steel and concrete volumes. In its role as a forerunner, Peikko continuously searches to further optimize steel and concrete volumes and has developed a state-of-the-art calculation method which requires less well-known soil parameters for each subsoil layer. This white paper presents a comprehensive study on soil modulus for different soil types, aiming to provide theoretical and practical guidelines to those involved in the onshore wind turbine foundation design.
Peikko product options
Gravity 7 foundations are used on medium and hard soil as well as solid rock. The loads are transferred from the tower to the ground through an anchor cage along with a wide and shallow foundation over large area of soil. Apart from standard reinforcement, gravity foundations designed by Peikko include PSB® Reinforcements. Our single and double headed studs as well as our PSBJs allow for efficient and trouble-free assembly. Peikko also delivers anchor cages, keeping lead-times to a minimum.
Design and site considerations
The final design starts after a joint kick-off meeting between several stakeholders to cross-check the initial requirements and site needs. These are then taken into account in the Gravity 7 design, Peikko’s manufacturing process of the components, labelling and quality information.
The Peikko studs are coloured-coded in accordance with the foundation design drawings to support the reinforcement workers. Beginning with the arrival of the trucks to the site, the Peikko studs, packed on wooden pallets, are made easy to offload with a forklift. The colour coding allows workers to organize the pallets close to the foundation according to the assembly position sequence. In addition, the colour coding will allow the speedy identification of the positions, ensuring a correct sequence, which is helpful for the final inspection.
Peikko Technical Support is always ready to provide advice and assistance, helping to ensure faster, safer, and more sustainable design and build.
Read Peikko’s White Paper -Soil modulus for onshore wind foundation design
Andris Bērziņš
Ms. Sc. Ing.
Senior Manager
Wind Energy Applications Team
Peikko Group Corporation
Jānis Šliseris
Dr. Sc. Ing.
Structural Designer
Wind Energy Applications Team
Peikko Group Corporation
Ville Lehtonen
PhD
Specialist
Ramboll Finland Oy
Bruno di Buó
PhD
Specialist
Ramboll Finland Oy
Marco D’Ignazio
PhD
Specialist
Ramboll Finland Oy
