Abstract Iron ore fines (IOFs) are indispensable material for industries with over million tons transported annually by sea. The transportation involves serious risk of marine accidents due to cargo liquefaction caused by the loss of shear strength under cyclic loads. In this work, the effect of moisture content on the unsaturated shear strength of the IOFs was analyzed, including the matric suction and the effective normal stress. The cyclic strength of the IOFs as a function of moisture content and number of cycles was presented, as well as a correlation between the cyclic strength ratios in the field and laboratory tests. Moreover, dynamic geotechnical centrifuge model tests were conducted to mimic the field condition and verify the method for liquefaction potential evaluation of the IOFs. The results showed that moisture content was the critical factor affecting the shear strength of the IOFs. The zones with high liquefaction potential were identified according to the cyclic strength ratio and the cyclic shear stress ratio along the depth. The evaluation results agreed well with those from the dynamic geotechnical centrifuge model tests. This work provided an approach to accurately evaluate the liquefaction potential of the IOFs utilizing the variation of moisture content during shipping.

中文翻译：

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基于水分含量与循环强度相关性的铁矿粉液化潜力评价

摘要 铁矿粉（IOFs）是每年海上运输超过百万吨的工业不可缺少的材料。运输过程中，由于在循环载荷作用下剪切强度损失而导致货物液化，因此存在严重的海上事故风险。在这项工作中，分析了水分含量对 IOF 不饱和剪切强度的影响，包括基质吸力和有效正应力。介绍了作为含水量和循环次数的函数的 IOF 的循环强度，以及现场和实验室测试中循环强度比之间的相关性。此外，还进行了动态岩土离心模型试验，以模拟现场条件并验证 IOF 液化潜力评估方法。结果表明，水分含量是影响IOFs剪切强度的关键因素。根据循环强度比和循环剪切应力比沿深度识别具有高液化潜力的区域。评价结果与动力岩土离心机模型试验结果吻合较好。这项工作提供了一种利用运输过程中水分含量变化来准确评估 IOF 液化潜力的方法。