COMPACTION DEGREE DISTRIBUTION INDUCED BY ROLLER COMPACTION WITH USING SOIL/WATER/AIR COUPLED F. E. SIMULATION

Abstract

In this study, compaction is assumed as loading and unloading on unsaturated soil under water-undrained and air-drained conditions, and the compaction simulation is conducted with soil/water /air coupled finite element analysis. First, the static compaction on one-dimensional compression condition was simulated to verify the definition of compaction. Consequently, the shape of the compaction curve can be drawn on the coordinates of water content and dry density. Moreover, it was found that depth distribution of void ratio is not unique within compacted specimen according to water content. Next, roller compaction was simulated to investigate the effects of compaction construction used in geotechnical engineering site. Roller compaction generated heterogeneity of compaction degree within the ground due to rotation of principal stress. It was found that the quality of compaction is strongly dependent on the direction of roller compaction.