近年来,我国海上风电产业蓬勃发展。然而海上风电场建设成本仍然偏高,这成为制约其进一步发展的关键因素。为了优化海上风电基础设计尺寸、减小海上风电场建设成本,本文对比分析了国际上主流适用于桩基础轴向承载力的5种静力初探(CPT)和5种孔压静力初探(CPTU)计算方法。通过浙江和江苏海域两处海上风电项目的现场地质勘察CPTU实测数据,逐一计算各试桩的桩端阻力、桩侧阻力及总承载力,检验这10种方法在桩承载力方面的表现,并采用3种评价标准来检验这些计算方法的适用性。结果表明:Fugro、ICP和UWA这3种方法在这两处地区应用有着显著的优势,其中ICP法在侧阻总力预测方面都有着一定的准确性和稳定性。
In recent years, China's offshore wind power industry has flourished. However, the construction cost of offshore wind farm is still high, which has become a key factor restricting its further development. In order to optimise the design size of offshore wind power foundation and reduce the construction cost of offshore wind farms, this paper compares and analyses five CPT and five CPTU calculation methods that are mainstream internationally applicable to the axial bearing capacity of pile foundation. Through the CPTU measured data of on-site geological investigation of two offshore wind power projects in Zhejiang and Jiangsu seas, the pile end resistance, pile side resistance and total bearing capacity of each test pile are calculated one by one to check the performance of these ten methods in terms of pile bearing capacity, and three evaluation criteria are used to check the applicability of these calculation methods. The results show that the three methods, Fugro, ICP and UWA, have significant advantages in the application in these two areas, among which the ICP method has certain accuracy and stability in the prediction of total lateral resistance.
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