Optimization of wind turbine foundations for poor soil

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

Abstract

One of the most important constraints on large-scale civil engineering projects is economic feasibility. All projects are restricted by the cost of construction and materials. A cost analysis of alternative foundation designs for wind turbines is done in this work to aid the choice of design solution. The suitability of different foundation types are compared including a novel solution, with a circular raft surrounded by a water tank for soil with poor properties. In this work cost and behavior comparisons are done for two foundation solutions, namely a piled raft and a circular raft surrounded by a water tank. An observed soil profile found in Gothenburg region, Sweden is used. The soil profile is implemented in the FE software Abaqus to find out the validity of using the different types of foundations on the mentioned type of soil. In terms of settlement and tilting it is shown that there is a good effect of using a water tank surrounding the ordinary circular raft for the actual soil profile in the Gothenburg region. For the cost issue, the analysis was carried out to calculate the whole foundation cost for a circular raft surrounded by a water tank and also for a piled raft. It is shown that using the new foundation system decrease the foundation cost compared to using piled raft with pile length = 28 m and one meter square pile. The effect of dynamic loads was also investigated and the results showed that the complete system, using circular raft surrounded by a water tank as a foundation, successfully avoids resonance through the rotor excitations.

Details

Authors
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Infrastructure Engineering

Keywords

  • Circular raft with a water tank, Dynamic analysis, FE analysis, Wind turbine foundations
Original languageEnglish
Title of host publicationCOMPDYN 2015
Subtitle of host publication5 th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering. Proceedings
EditorsM. Papadrakakis, V. Papadopoulos, V. Plevris
Place of PublicationAthens, Greece
PublisherNational Technical University of Athens
Pages4292-4304
Number of pages13
VolumeII
Edition1
ISBN (Electronic)978-960-99994-7-2
StatePublished - 2015
Publication categoryResearch
Peer-reviewedYes

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