This paper details analysis of deformation behaviour of silica and carbonate sands under a rectangular foundation subject to uniaxial vertical load based on results from a series of centrifuge model tests. A multiscale particle image velocimetry/digital image correlation (PIV/DIC) technique was used to record and analyse the foundation tests with high resolution and measurement precision. Cone penetrometer and pressuremeter tests provide in situ soil characterisation of the tested sand sample in the centrifuge environment. The soil behaviour is analysed through foundation load–settlement response and the observed soil deformation measurements. Different soil deformation mechanisms and strain behaviours were observed in the different sands tested, and the particle shape effect is considered, with data from scanning electron microscopy, to explain the differences. The results and analyses contribute towards better understanding of different soil behaviours under shallow foundations in different sands.

中文翻译：

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矩形矩形浅层基础在沙滩上的作用：垂直荷载

本文基于一系列离心模型试验的结果，详细分析了在矩形基础上承受单轴垂直载荷的二氧化硅和碳酸盐砂的变形行为。多尺度粒子图像测速/数字图像相关技术（PIV / DIC）被用于记录和分析基础测试，具有高分辨率和测量精度。锥形渗透仪和压力计测试可在离心环境中对被测砂样品进行原位土壤表征。通过地基荷载-沉降响应和观测到的土壤变形测量来分析土壤行为。在不同的测试砂中观察到了不同的土壤变形机制和应变行为，并考虑了颗粒形状效应，其数据来自扫描电子显微镜，解释差异。结果和分析有助于更好地理解不同沙土中浅层基础下不同土壤的行为。