针对海上风力机基础设计中的软黏土强度评价问题,通过在浙江嘉兴海域开展球形静力触探试验和室内试验,标定得到适合中国浙江嘉兴海域淤泥质粉质黏土的球形静力触探因子Nball。采用固结快剪试验结果标定得到的NballDS范围为6.70~14.91,总平均值为10.58,标准值为10.91;采用三轴UU试验结果标定得到的NballUU范围为7.75~23.75,总平均值为17.44,标准值为19.03。采用标定得到的Nball值可较好地解译嘉兴海域软黏土的强度,建议采用三轴UU试验结果标定得到的NballUU的标准值19.03作为强度下限值解译参数,采用固结快剪试验得到的NballDS的标准值10.91作为最优强度（中值）解译参数。
Abstract
In addressing the challenge of assessing the strength of soft clay in the foundation design of offshore wind turbines, this paper focuses on the strength calibration of soft clay in Zhejiang Jiaxing's offshore region by ball penetration tests and laboratory test results. The ball penetration factor Nball for moddy silty clay was obtained. The ball penetration factor NballDSdetermined through consolidated quick shear tests, is ranged from 6.70 to 14.91, with a mean of 10.58 and a standard value of 10.91. Likewise, the factorNballUU determined by using triaxial unconsolidated undrained shear test results, is ranged from 7.75 to 23.75, with a mean of 17.44, and a standard value of 19.03. The calibrated ball factor Nball provides a more accurate representation of the soft clay strength in Zhejiang Jiaxing's offshore area. We recommend adopting NballUU with a standard value of 19.03, calibrated from the triaxial UU test, as the parameter for interpreting the lower limit of strength. Additionally, NballDS with a standard value of 10.91, calibrated from the consolidated quick shear test, serves as the parameter for interpreting the best estimate （median value） of strength.
关键词
海上风电场 /
黏土 /
抗剪强度 /
球形静力触探 /
球探因子
Key words
offshore wind farms /
clay /
shear strength /
ball penetration test /
ball penetration factor
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基金
国家自然科学基金（52108356; 52101334）; 浙江省自然科学基金（LQ20E090001）
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