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首页> 外文期刊>Bulletin of earthquake engineering >The effect of clay mineral content on the dynamic response of reconstituted fine grained soil
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The effect of clay mineral content on the dynamic response of reconstituted fine grained soil

机译：粘土矿物质含量对重构细粒土壤动力响应的影响

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摘要

Fine grained soils with considerable amount of silt may exhibit sand-like or clay-like behavior depending on several factors such as the amount of fines and clay content, as well as the consistency limits, other variables being kept unchanged. This unpredictable behavior makes silts highly problematic, especially under seismic conditions. This paper describes the laboratory behavior of low plasticity Adapazari silt, known to be highly sensitive to cyclic loading. In the first phase of the basic study reported herein, Adapazari silt was mixed with different percentages of bentonite and kaolin and the behavior of these reconstituted mixtures was investigated in cyclic triaxial and dynamic simple shear tests. The purpose was to identify basic index properties and their threshold values to delineate sand- and clay-like behavior. Such a distinction may make it possible to complement field penetration resistance with appropriate adjustment factors to evaluate the pore pressure development potential, thus the risk of ground failure during an earthquake. The results show that there is a range of liquid limit and plasticity index values above which cyclic failure is significantly mitigated. It can now be stated that silts of intermediate and high plasticity may be deemed of relatively low potential for ground failure during seismic loading.
机译：具有相当大量淤泥的细粒土壤可能表现出砂状或粘土的行为，这取决于诸如细粒和粘土含量的量，以及稠度限制，其他变量保持不变。这种不可预测的行为使得淤泥非常有问题，特别是在地震条件下。本文介绍了低可塑性Adapazari淤泥的实验室行为，已知对循环载荷非常敏感。在本文报道的基础研究的第一阶段，亚卡巴拉淤泥与膨润土和高岭土的不同百分比混合，并在环状三轴和动态简单的剪切试验中研究了这些重构混合物的行为。目的是识别基本索引属性及其阈值以描绘沙子和粘土的行为。这种区别可以使可以通过适当的调节因子补充场穿透阻力以评估孔隙压力发展潜力，从而在地震期间发生地发生故障的风险。结果表明，存在一系列液体限制和可塑性指标值，高于该液体限制值，循环衰竭被显着减轻。现在可以说，中间和高可塑性的淤泥可以被视为地震载荷期间的接地失效潜力相对较低。

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