Discrete Element Modeling of Dynamic Compaction with Different Tamping Condition

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Ghassemi A.; Shahebrahimi S.S.

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Journal Paper

Paper Information

Journal: Civil Engineering Infrastructures Journal Year:2020 | Volume:53 | Issue:1 Page(s): 173-188

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Information Journal Paper

Title

Discrete Element Modeling of Dynamic Compaction with Different Tamping Condition

Author(s)

Ghassemi A. | Shahebrahimi S.S. | Issue Writer Certificate

Keywords

Discrete Element Method

Dynamic Compaction

Tamper Shape

Abstract

Dynamic Compaction (DC) is a common deep compaction method that is usually used for densification of coarse-grained soils. Although traditional continuum-based models such as the Finite Element Method can be successfully applied for assessment of stress distributions or deformations induced by DC, they are typically not adequate for capturing the grain scale mechanisms of soil behavior under impact. In contrast, numerical models such as Discrete Element Method (DEM) in which the interaction of constituting distinct elements is explicitly simulated are promising for simulation of DC process. In this study, Dynamic Compaction in a dry rockfill was simulated through a two-dimensional DEM model. Based on the developed model, a series of analyses with various tamper weights and drop heights were conducted to investigate the effects of important factors such as energy and momentum per drop on DC results. Comparison of the obtained results with experimental observations reveal the capability of DEM for simulation of DC. The numerical simulations also confirm the positive effect of using conical-based tampers in DC process.

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