Abstract
To investigate the influence of the potential mechanical properties of backfill materials on geogrid reinforcing effects, a series of plane strain compression tests were performed. Differences of reinforcement effects on two types of gravelly soils that have similar grain distributions were investigated in this study. As a result, it was confirmed that the strength-deformation characteristics of compacted gravelly soils did not match even if the gravel soils have the same grains and dry density, and the difference was further increased by the geogrid reinforcing. The reinforcing effect is affected to the dilatancy behavior of the backfill materials. Therefore, the results obtained in the present study indicate that selection of backfill material and well soil compaction leads to construction of soil structure with required stability.
