›› 2014, Vol. 35 ›› Issue (3): 820-826.

• Geotechnical Engineering • Previous Articles     Next Articles

Pore water pressure fluctuation and liquefaction analysis of subgrade for composite bucket foundation under cyclic loading

YU Tong-shun，WANG Hai-jun   

  1. State Key Laboratory of Hydraulic Engineering Simulation and Security, Tianjin University, Tianjin 300072, China
  • Received:2013-03-20 Online:2014-03-10 Published:2014-03-19

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Abstract: Composite bucket foundation which is wide and shallow is a new kind of foundation. The fluctuating pore water pressure around the foundation has bad influence on the safety of wind turbine under the wind, wave and current loads. In order to investigate the dynamic response of the foundation under the wind, wave and current loads, the numerical analysis is carried out. The combined effect among the wind, wave, current loads acted on the wind turbine structure and the subgrade is simulated reasonably based on the accurate simulation of various loads, and the model of the dynamic response of bucket foundation is presented with the three-dimensional finite element method. According to the numerical model, the dynamic response pattern of subgrade including the laws of the pore water pressure fluctuation and liquefaction locality around the bucket foundation are identified. It can be concluded that the liquefaction depth in the vicinity of composite bucket foundation increases with the growth of the saturation, permeability, wave period and water depth, and it decreases with the addition of the Poisson ratio.

Key words: composite bucket foundation, dynamic response, subgrade, pore water pressure, liquefaction

CLC Number: 

  • TU435
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