Centrifuge dataset for screw pile installation and uplift

The dataset describes the installation and uplift loading of a screw piles in a sand bed prepared by dry pluviation. The full details of the procedure can be found in the related paper.
The different phases of each test are described in Figure 1. The data sampling rate is equal to 10ms.
1. The centrifuge is spun up to the final g-level (50g at mid-depth of the pile).
2. A period of rest (few minutes).
3. Installation of the pile at a given advancement ratio (AR), defined as the vertical displacement of the pile per rotation, normalised by the helix pitch (helix height, measured at mid-plate). The rotation rate is fixed at 3RPM and the vertical rate depends on the AR.
4. The torque motor is disengaged (torque is released) and another rest period is allowed.
5. The pile is uplifted of 10mm at a rate of 1mm/min.
6. (Optional) The pile is unscrewed up to the surface.
7. The centrifuge is spun down.
The measured data are given at model scale and their units indicated between brackets.
1. The vertical position [mm] of the pile, whose tip is initially one or two mm from the sand surface. The position is measured from the top and position downwards.
2. The vertical force [kN] at the top of the pile, which is positive downwards (pile in compression).
3. The torque [Nm] measured at the top of the pile, which is positive clockwise.
There is an offset for each measured data. The offset considered in the paper to zero the different measurements is the value measured at the end of the first rest period. A summary of all the tests main parameters is given in the summary Excel file.

本数据集描述了采用干法沉积（dry pluviation）制备的砂床中螺旋桩（screw piles）的安装与上拔加载试验。试验完整流程细节可参见相关研究论文。
各项试验的不同阶段详见图1。数据采样率为10ms。
1. 将离心机加速至目标离心加速度（桩身中点处为50g）。
2. 静置阶段（时长数分钟）。
3. 以给定的推进比（advancement ratio, AR）安装桩体：推进比定义为桩体每旋转一周的垂直位移，经螺旋间距（helix pitch）归一化后的值（螺旋间距即螺旋叶片高度，取板中位置处的测量值）。旋转速率固定为3转每分钟（RPM），垂直进给速率随推进比调整。
4. 断开扭矩电机（torque motor）以释放扭矩，随后再次进入静置阶段。
5. 以1mm/min的速率将桩体上拔10mm。
6. （可选）将桩体旋拧至地表。
7. 将离心机减速停机。

所有测量数据均为模型尺度，单位标注于方括号内：
1. 桩体垂直位置[mm]：桩尖初始距离砂面1~2mm，位置以桩顶为基准向下计量。
2. 桩顶竖向力[kN]：向下为正（桩体受压时为正）。
3. 桩顶扭矩[Nm]：顺时针方向为正。

所有测量数据均存在系统偏差。论文中用于将各测量值归零的偏差值，取自第一次静置阶段结束时的测量结果。所有试验的主要参数汇总信息详见配套Excel文件。

搜集汇总

背景与挑战

背景概述

该数据集聚焦于螺旋桩在沙床中的安装和上拔加载实验，使用离心机模拟50g重力环境以研究桩的性能。数据包括垂直位置、力和扭矩的测量，采样率为10ms，适用于分析螺旋桩在海洋能源应用中的行为。数据集提供详细测试参数和原始数据，发布于2021年5月，采用开放获取许可，支持土木工程和岩土工程领域的研究。