基于P&H桩基础力学性能研究

Mechanical properties research based on P&H pile foundation

以某风电场工程为例,建立了地基—基础三维有限元模型,对基础结构进行有限元计算。考虑了不同的荷载工况,对P&H无张力桩基础两波纹管中间的回填混凝土进行优化分析,验算了不同强度混凝土的稳定情况。结果表明:P&H桩基础能满足风机的稳定和强度要求,且更换强度从C30到C50的混凝土作为回填混凝土对基础位移和应力的影响不大。

Taking a wind farm project as an example,a three-dimensional finite element model of foundation-foundation is established,and the finite element calculation of the foundation structure is carried out.Considering different load conditions,the backfill concrete in the middle of the P&H tension-free pile foundation is optimized and the stability of different strength concrete is checked.The conclusions show that the P&H pile foundation can meet the stability and strength requirements of the wind turbine,and the concrete with the replacement strength from C30 to C50 has little effect on the foundation displacement and stress.