›› 2015, Vol. 36 ›› Issue (2): 591-599.doi: 10.16285/j.rsm.2015.02.040

• Numerical Analysis • Previous Articles     Next Articles

Bearing capacity and deflection behaviors of large diameter monopile foundations in sand seabed

LIU Jin-chao1, XIONG Gen2, 3, ZHU Bin3, YING Pan-pan3   

  1. 1. China Energy Engineering Group Co, Ltd. Guangdong Electric Power Design Institute, Guangzhou, Guangdong 510663; 2. Huadong Engineering Corporation Limited, HydroChina Corporation, Hangzhou, Zhejiang 310014, China; 3. Institute of Geotechnical Engineering, Zhejiang University, Hangzhou, Zhejiang 310058
  • Received:2013-10-11 Online:2015-02-11 Published:2018-06-13

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Abstract: A series of consolidated drained (CD) triaxial compression tests on sand with dilatancy is conducted to obtain mechanical parameters. The behaviors of large diameter monopile foundation in offshore under horizontal loading are analyzed using a three-dimensional finite element model with the finite element software ABAQUS. A lot of parameters, like stress path, friction angle, dilatancy angle and the characteristics of soil-pile surface, are taken into consideration to study the soil structure behavior, which is verified with the centrifuge modeling. Then, a reasonable finite element computational model of large diameter monopile foundation under horizontal loading including the parameter selection method of this model is established. Besides, the deformation is proposed as the control criterion to determine the horizontal bearing capacity of monopile foundation for the offshore wind turbine. With that, the pros and cons of existing methods for analyzing horizontal bearing capacity and deformation of pile foundation are discussed. Finally, it is suggested to determine the critical embedded length of monopile foundation by numerical analysis.

Key words: large diameter monopole foundation, three-dimensional numerical analysis, horizontal bearing behaviors, sand

CLC Number: 

  • TU 441+.5
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