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http://dx.doi.org/10.7843/kgs.2015.31.4.31

Numerical Analysis on the Effect of Increasing Stiffness of Geosynthetics on Soil Displacement and Pile Efficiency in Piled Embankment on Soft Soil  

Lee, Taehee (Dept. of Civil Eng., Kyung Hee Univ.)
Lee, Su-Hyung (Korea Railroad Research Institute)
Lee, Il-Wha (Korea Railroad Research Institute)
Jung, Young-Hoon (Dept. of Civil Eng., Kyung Hee Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.31, no.4, 2015 , pp. 31-43 More about this Journal
Abstract
A numerical analysis on the effect of increasing tensile stiffness of the geosynthetics on the soil displacement and pile efficiency was conducted. Parametric studies by changing the stiffness of soft soil, internal friction and dilatancy angles of the embankment material, and flexual stiffness of the composite layer including the geosynthetics were carried out. In general, increasing stiffness of the geosynthetics improves the pile efficiency, whereas the amount of its improvement depends on the condition of parameters. In case of the sufficiently low stiffness of the soft soil or high flexual stiffness of the composite layer including the geosynthetics, a noticeable increase in the pile efficiency can be observed. When the stiffness of the soft soil is very low, the increase in the stiffness of the geosynthetics can significantly reduce the vertical displacement in the piled embankment. When the flexual stiffness of the composite layer is sufficiently high, increasing stiffness of the geosynthetics can greatly improve the pile efficiency.
Keywords
Piled embankment; Displacement; Pile efficiency; Geosynthetics;
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