›› 2015, Vol. 36 ›› Issue (10): 2750-2758.doi: 10.16285/j.rsm.2015.10.002

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Method for calculating the horizontal bearing capacity of segmentally-tapered bucket foundation of offshore wind turbines

LIU Jin-long1, CHEN Lu-wang2, WANG Ji-li3, WANG Dong-lin4   

  1. 1. Department of Civil Engineering, Hefei University, Hefei, Anhui 230601, China; 2. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei , Anhui 230009, China; 3. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 4. School of Civil Engineering, Anhui Jianzhu University, Hefei, Anhui 230601, China
  • Received:2014-05-07 Online:2015-10-10 Published:2018-06-13

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Abstract: Because large construction ships cannot enter the shallow sea, traditional configuration foundations, such as gravity-type foundation and pile foundation, are not suited for offshore wind power project in shallow seas. Therefore, a new type of foundation—segmentally-tapered bucket foundation is proposed. Based on the limit equilibrium method, a systematic method is proposed to calculate the horizontal bearing capacity of the segmentally-tapered bucket foundation. The influences of obliquity of wall, foundation height, top diameter of bucket and soil parameters on the horizontal bearing capacity of the segmentally-tapered bucket foundation are analyzed. It is found that the horizontal bearing capacity increases with the increase of the wall obliquity, soil resistance, top diameter of bucket and foundation height, while decreases with the increase of the depth of seabed. Based on the concept of volume compression ratio, the bucket foundation with inclined upper section wall and vertical lower section wall is recommended and demonstrated. An accurate method is proposed to determine the proportional coefficient of soil resistance. The results are helpful in the optimization design of traditional bucket foundation.

Key words: offshore wind turbine, segmentally-tapered bucket foundation, horizontal bearing capacity, limit equilibrium method, volume compression ratio

CLC Number: 

  • P 754
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