Flat Rocks Wind Farm Foundations Detailed Design

The Flat Rocks Wind Farm Stage 1 Project consists of the construction and operation of 18 x 4.2 MW Vestas Wind turbines and the related civil and electrical infrastructure.

The farm project site spans the shires of Kojonup and Broomehill-Tambellup, in the Great Southern Region of Western Australia.

Scope of Work

Detailed Design of the Civil Balance of Plant including:

  • Approximately 18 km of new access tracks
  • 18 Crane pads
  • 18 WTG foundations
  • Substation and O&M pad
  • Site compound
  • Batching plant compound

Project Challenges

  • Non homogeneous soil conditions
  • Inability to source circular reinforcement in the local market.

How We Managed This

  • Additional geotechnical investigation
  • Advanced geotechnical models (Plaxis)
  • Replacement of circular reinforcement with segmental reinforcement (innovative approach).

Value Engineering

  • The advanced geotechnical model has allowed to optimize the size of the foundations and reduce the quantity of concrete compared to the tender quantity
  • The replacement of circular reinforcement with segmental reinforcement, rather than changing to a 2 directional perpendicular arrangement has allowed to maintain reinforcement rates well below the tender values.

Type of Work:

Civil Engineering, Structural Engineering

Location:

Australia, Kojonup, Western Australia

Engineering Phase:

Detailed Engineering

Industries:

Infrastructure, Wind and Solar

Duration:

12 months