Applicability of DEM simulation for soil compaction
2004
Murakami, T. (Geo-Research Inst., Osaka (Japan)) | Sakaguchi, H. | Murakami, A.
Abstract Although the soil compaction is essential process in civil engineering, the principal mechanisms still remain unresolved. To capture the mechanism of soil compaction from micro-mechanical viewpoint, the current paper describes a numerical model where both the adhesive force and the lubricative effect due to liquid bridges are incorporated into the two-dimensional DEM model. Behavior of the soil compacted at various water contents is numerically obtained by relating the water content to the interparticle force based on liquid bridge between particles. In addition, a macro-particle model is adopted to represent an angularity of particle due to its complicated shape. Numerical simulation of soil compaction test by the proposed model is carried out and the results are found to be in good agreement with the compaction curve obtained through usual experiments. Whereas the current model is devoid of the reference of the physical phenomenon like excess pore water pressure, the result, that the peak of the dry density is obtained in the course of increasing water content, shows possibility of re-create and reveal the mechanisms of soil compaction using DEM simulation.
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