The effect of silt intrusion on the liquefaction susceptibility of fine saturated sand has been studied here using a series of strain-controlled cyclic triaxial tests on isotropically consolidated soil specimens. The fine sands used in this study were collected from the Ganga and Sone river bed. The samples were prepared with 100% non-plastic silt, 100% sand and different percentage (5%, 10%, 20%, and 30%) of non-plastic silt mixed with fine sand to study the effect of intruded silt on liquefaction susceptibility of sand. It has been found that at the same relative density range (10–25%) and the same percentage of intruded non-plastic silt, the Ganga sand is having higher liquefaction susceptibility than the Sone sand. The outcome of the study also showed that the rate of generation of excess pore water pressure (EPWP) for all three soil specimens was more or less same at higher strain levels (0.66–1.31%). However, the liquefaction potential continues to increase with the increase in silt content at a lower strain rate of 0.13%. A graphical relationship has been proposed for the EPWP development model parameter as a function of non-plastic silt content. This modification in the EPWP model parameter is one of the novel aspects presented here, which can be used for site-specific nonlinear ground response analysis.

中文翻译：

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淤泥含量对细饱和河床砂液化敏感性的影响

这里使用一系列应变控制循环三轴试验研究了淤泥侵入对细饱和细砂的液化敏感性的影响，这些试验对各向同性固结的土壤标本进行了研究。本研究中使用的细砂是从恒河和松恩河床收集的。用100%非塑性粉土、100%砂和不同比例（5%、10%、20%和30%）的非塑性粉土与细砂混合制备样品，研究侵入的粉土对液化的影响沙的敏感性。已经发现，在相同的相对密度范围（10-25%）和相同百分比的非塑性淤泥侵入时，恒河砂比松根砂具有更高的液化敏感性。研究结果还表明，在较高应变水平 (0.66–1.31%) 下，所有三个土壤样品的超孔隙水压力 (EPWP) 产生率或多或少相同。然而，在 0.13% 的较低应变率下，液化潜力随着淤泥含量的增加而继续增加。已提出 EPWP 开发模型参数的图形关系作为非塑性淤泥含量的函数。EPWP 模型参数中的这种修改是此处介绍的新颖方面之一，可用于特定地点的非线性地面响应分析。已提出 EPWP 开发模型参数的图形关系作为非塑性淤泥含量的函数。EPWP 模型参数中的这种修改是此处介绍的新颖方面之一，可用于特定地点的非线性地面响应分析。已提出 EPWP 开发模型参数的图形关系作为非塑性淤泥含量的函数。EPWP 模型参数中的这种修改是此处介绍的新颖方面之一，可用于特定地点的非线性地面响应分析。