基于吸力筒型基础施工数据的沉贯阻力系数反演分析

Back Analysis of Penetration Resistance Coefficients based on Construction Data of Suction Bucket Foundation

基于广东某海上风电场的吸力筒型基础的静力触探数据和沉贯施工现场数据,将沉贯阻力公式转化为变化量形式,通过二元线性回归分析,得到场址浅表层不同类型地基的沉贯端阻力系数和侧摩阻力系数。结果表明,采用本文方法反演的沉贯阻力系数相比目前工程常用的DNV推荐沉贯阻力参数在计算吸力筒沉贯最大阻力上更准确,可用于设计、施工阶段准确分析筒体受到的沉贯阻力,指导并优化吸力筒型基础结构设计和施工。

Based on the piezocone penetration test data and the penetration construction field data of the suction bucket foundation in an offshore wind farm in Guangdong Province,the end resistance coefficients and the lateral resistance coefficients of different foundation soils of the site are obtained with the variation form penetration resistance formula and the binary linear regression analysis method.The results show that the penetration resistance coefficients obtained by the back analysis are more accurate in the calculation of the maximum penetration resistance of the suction bucket than the commonly used DNV recommended parameters.Thus,the method can be used to accurately analyze the penetration resistance of the suction bucket during the design and construction stages,and guide and optimize the design and construction of the suction bucket foundation structures.