运动海床对近海风机单桩基础的影响

Effect of seabed motion on offshore wind turbine monopile

以东海大桥海上风电场为研究背景,首先基于Biot固结理论求解了不同波况下多层非均质土体的位移、超孔压的分布,讨论了波浪荷载对海床运动的影响。而后基于土体位移计算结果,应用支座位移加载法与p-y曲线法相结合的方法,求解了运动海床作用下近海风机单桩基础的内力和变形,并将其结果与不考虑运动海床作用的结果进行了对比。对比结果显示:运动海床对桩身的变形影响显著,设计中有必要进行运动海床作用下的变形校核。

Taking Donghai bridge offshore wind farm as the background,this paper firstly calculates the displacement and excess pore pressure of multi-layer non-homogeneous soil based on Biot consolidation theory,and makes a discussion on the effect of wave load on the seabed motion;then,based on the displacement results,this paper obtains the internal forces and deformations of offshore wind turbine monopole by the dynamic p-y method and the support displacement loading method,and compares them with the results without seabed motion.It is illustrated that the seabed motion has appreciable impact on the deformation of pile shaft,therefore,it is recommended to perform the deformation check considering seabed motion.