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Volume 35 Issue zk1
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ZHU Bin, YING Pan-pan, GUO Jun-ke, ZHANG Wen-long, KONG De-qiong, CHEN Yun-min. Analysis and design of bearing capacity of suction caisson foundations of offshore wind turbines[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(zk1): 443-450.
Citation: ZHU Bin, YING Pan-pan, GUO Jun-ke, ZHANG Wen-long, KONG De-qiong, CHEN Yun-min. Analysis and design of bearing capacity of suction caisson foundations of offshore wind turbines[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(zk1): 443-450.
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Analysis and design of bearing capacity of suction caisson foundations of offshore wind turbines

  • 1. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, China; 2. Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China; 3. Zhejiang Electric Power Design Institute, Hangzhou 310012, China

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  • Received Date: March 01, 2013
  • Published Date: July 18, 2013
    Graphical Abstract
    • Abstract
  • The suction caisson foundation is an important option for offshore wind turbines owing to its advantages of quick and convenient installation. With regard to the load characteristics of offshore wind turbines subjected to huge overturning moment loading, an approach for overturning bearing capacity of the mono-caisson based on deformation is proposed according to the model tests deformation mode and the soil-structure interaction of the mono-caisson foundation. The approach is different from the existing approaches for the ultimate bearing capacity. An approach for the overturning bearing capacity of multi-caisson foundations is also presented based on the multi-caisson model tests. The overturning bearing capacity of the mono-caisson is decided by the aspect ratio and the diameter, while that of the multi-caisson is depended on the diameter of the caisson and the spacing between the caissons. During a typical storm, the suction inside the caisson in silt is unable to dissipate. Thus its moment capacity can be analyzed as that under the undrained condition. The negative pressure will cause a substantial increase in the capacity of multi-caisson foundation against overturning moment. A typical wind turbine is taken as an example to carry out the calculation and design work utilizing the approaches mentioned above. This study can be a reference for similar real projects.
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    • References (1)
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