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Centrifuge modelling of rigid piles in soft clay

机译:软土中刚性桩的离心模型

摘要

Monopiles have so far been extensively used as foundation solutions for renewable energy, with the most popular being offshore wind developments. The current design practice of monopiles subjected to lateral loading has been widely questioned, because of the lack of empirical data. The objective of this study is to employ centrifuge modelling in order to derive experimental p-y curves for rigid piles embedded in over-consolidated soft clay. A kaolin clay sample was prepared and pre-consolidated by applying a constant pressure at the soil surface, while different over-consolidation ratios were achieved within the clay sample by carrying out the experiments at different g fields. The findings suggest that the normalised shape of the p-y curves can be predicted within a sufficient accuracy using the current methodology but that the ultimate lat-eral resistance is underestimated at shallow depths and overestimated at greater depths.
机译:迄今为止,单桩已被广泛用作可再生能源的基础解决方案,其中最受欢迎的是海上风电开发。由于缺乏经验数据,当前承受侧向荷载的单桩设计实践受到了广泛质疑。这项研究的目的是采用离心建模,以得出嵌入在超固结软粘土中的刚性桩的实验p-y曲线。制备高岭土样品并通过在土壤表面施加恒定压力对其进行预固结,同时通过在不同g场进行实验,在粘土样品中获得了不同的超固结比。这些发现表明,使用当前的方法可以在足够的精度内预测p-y曲线的归一化形状,但在浅深度下会低估最终的横向电阻,而在较大深度下会高估最终的横向阻力。

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