Physical and Mechanical Properties of Ottawa F65 Sand
Physical and Mechanical Properties of Ottawa F65 Sand
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DOI：
10.1007/978-3-030-22818-7_3
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发表时间：
2019-11
期刊：
影响因子：
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通讯作者：
Mohamed El Ghoraiby;Hanna Park;M. Manzari
中科院分区：
文献类型：
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作者：
Mohamed El Ghoraiby;Hanna Park;M. Manzari
本文介绍了渥太华 F65 砂的土壤表征和元素测试结果。所提供的数据旨在用作液化实验和分析项目 (LEAP 2017) 一部分进行的预测练习的校准材料。生成的数据库包括土壤比重测试、粒度分析、导水率测试、最大和最小孔隙比测试以及循环三轴应力控制测试。通过减少样品制备中的变异源和增加测试数量，努力确保测试结果的一致性和可重复性。通过对五个不同批次的样品进行测试来评估土壤的均匀性。结果显示，五个批次的砂子是均匀的。由于先前报告的最大和最小空隙率结果存在显着差异，因此通过比较从三个不同操作员获得的测试结果来研究测试操作员的影响。对于三轴试验，采用等高干法沉积法进行样品制备。为了消除人为误差对保持恒定落差的影响并确保不同样品之间砂织物的一致性，开发了一种设备来促进样品制备。使用三种不同的土壤密度进行循环三轴实验，并根据2.5%单幅轴向应变标准获得每种密度的液化强度曲线。本研究中开发的数据库通过 DesignSafe 向社区公开提供。
This paper presents the results of soil characterization and element tests of Ottawa F65 sand. The data presented is intended to be used as calibration material for the prediction exercise conducted as part of the Liquefaction Experiments and Analysis Project (LEAP 2017). The databank generated includes soil specific gravity tests, particle size analysis, hydraulic conductivity tests, maximum and minimum void ratio tests, and cyclic triaxial stress-controlled tests. An effort was made to ensure the consistency and repeatability of the test results by reducing the sources of variability in the sample preparations and increasing the number of tests. The uniformity of the soil was evaluated by conducting tests on samples from five different batches. The results showed that the sand is uniform among the five batches. Due to significant variability in previously reported maximum and minimum void ratio results, the effects of the test operator were studied by comparing test results obtained from three different operators. For the triaxial tests, a constant height dry pluviation method was used for sample preparation. To eliminate the effect of the human error in maintaining a constant drop height and to ensure consistency of the sand fabric between different samples, a device was developed to facilitate the sample preparation. The cyclic triaxial experiments were performed using three different soil densities, and a liquefaction strength curve was obtained for each density based on a 2.5% single amplitude axial strain criteria. The developed databank in this study was made publicly available for the community through DesignSafe.