海上风机超大直径单桩竖向抗压承载力理论计算及实测方法对比评价

超大直径单桩基础在应用过程中,存在钢管桩沉桩的选锤、防溜桩等关键问题.为解决以上问题,研究超大直径单桩的竖向抗压承载力是有必要的.分别利用《码头结构设计规范》规定的设计做法、圆孔扩张理论法、UWA-05方法、GRLWEAP模型方法对超大直径钢管桩的竖向抗压承载力进行了分析计算并结合工程实例进行比较,发现现行规范规定的钢管桩承载力计算公式对于超大直径钢管桩承载力的估计偏于保守,高应变检测法对于超大直径单桩基础承载力的评估同样偏于保守.

Comparative evaluation of theoretical method and in situ tests method on vertical compressive bearing capacity of super-large-diameter monopiles for offshore wind turbines

In installing super-large-diameter monopiles, engineers are constantly challenged by hammer selection and unexpected pile running, which makes it necessary to study the vertical compressive bearing capacity of monopiles. The bearing capacity was analyzed using the Wharf structure design code method, the cavity expansion theory, the UWA-05 method and the GRLWEAP method. Through the comparison between these methods, it is found that the current design method is conservative when used for the evaluation of the bearing capacity of monopiles. It is found that the high strain test results are also conservative when used for the evaluation of the bearing capacity of monopiles.