海上风电场复合桩基础体型优化及承载力特性研究

基于弹性地基反力法,推导出复合桩基础水平承载力理论计算公式,并以承载力和结构强度满足设计要求为约束条件,根据SQP优化理论对基础进行体型优化。采用三维有限元分析的方法,系统地研究了复合桩基础水平承载力特性,分析了基础桩侧土体抗力的分布形式。研究结果可为复合桩基础的结构设计以及实际运行过程中安全性和稳定性的控制提供了参考依据。

Study on shape optimization and bearing capacity characteristics of composite pile foundation for offshore wind farm

Based on elastic subgrade reaction method， the theoretical calculating formula for the horizontal bearing capacity of the composite pile foundation is deduced， and then the shape optimization is made on the foundation according to the SQP optimization theory by the constraint condition that both the bearing capacity and the structural strength must meet the requirement of the design. Furthermore， the horizontal bearing capacity of the composite pile foundation is systematically studied and then the distribution pattern of the lateral soil resistance of the foundation pile is analyzed with the 3-D finite element analysis method. The study result can provide a reference basis for the structural design and the control of the safety and stability during the actual operation of the composite pile foundation.