Title: Evaluation of Geogrid-Reinforced Pile-Supported Embankments under Cyclic Loading Using Discrete Element Method
Abstract: Geosynthetic-reinforced pile-supported embankments have been increasingly used as a rapid construction technique to reduce total and differential settlements and enhance load transfer from soil to piles for embankments over soft soils. Most studies have been done so far to investigate this embankment system under static loads. However, highway and railway embankments are subjected to cyclic loading. The behavior of this embankment system under cyclic loading is not well known, therefore, it deserves further research. In this study, the discrete element method incorporated in the Particle Flow Code (PFC) 2D was adopted to investigate the movement of soil particles above pile caps and the geogrid layer. A cyclic load was applied on the top of the assembly and the contact stresses and the tension in the geogrid under cyclic loading were monitored and analyzed. The DEM analysis shows that the geogrid reduced the permanent deformation under cyclic loading and increased the stress concentration ratio as compared with the unreinforced embankment. The flexural stiffness of the geogrid influenced the magnitude and distribution of the tension along the geogrid.
Publication Year: 2009
Publication Date: 2009-03-10
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 28
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