Abstract
The paper summarizes a compilation of existing cyclic experimental data on reconstituted and undisturbed specimens of low-plasticity fine-grained soils to assess liquefaction resistance. The authors normalized the data to reduce the effect of other relevant factors such as shear mode, density, effective confining stress and cyclic loading frequency. It is indicated that liquefaction resistance of the specimens reconstituted using slurry consolidation approach is lower than that of the undisturbed specimens. The liquefaction resistance for undisturbed specimens decreases with an increase in the plasticity index up to 4–5 and then increases with a further increase in plasticity index. A new correction factor K PI to estimate the effect of plasticity index on cyclic resistance ratio is proposed for design purposes and added into the framework of liquefaction evaluation of claylike fine-grained soils with PI of 7–18 (change to 5–18, if ML–CL) on the base of the approach of Boulanger and Idriss. Because the effect of plasticity index on liquefaction resistance is slight when the plasticity index is <7, it is suggested that the liquefaction evaluation of sandlike fine-grained soils with PI of 0–7 (changed to 0–5, if ML–CL) follows the framework of simplified procedures using SPT and CPT data.
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Acknowledgments
The financial support of National Natural Science Foundation of China (No. 51208516) and Postdoctoral Science Foundation of China (2014M550424) is sincerely appreciated. The authors are grateful to Professors Louis Ge in National Taiwan University, and he provided valuable comments during this research.
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Wang, S., Luna, R. & Yang, J. Reexamination of effect of plasticity on liquefaction resistance of low-plasticity fine-grained soils and its potential application. Acta Geotech. 11, 1209–1216 (2016). https://doi.org/10.1007/s11440-015-0394-8
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DOI: https://doi.org/10.1007/s11440-015-0394-8