A CONSIDERATION FOR IMPACT COMPACTION OF SANDY SEA BED

It is important to evaluate the compaction characteristics of submerged sand since the quality of compacted sea bed is much influenced by the compaction methods. However, there are only a few studies concerning the compaction of submerged sand. The aim of this paper is therefore to make clear the basic mechanism of the compaction of submerged sand. Some factors including rammer weight, rammer dropping height and number of rammer drops etc. are experimentally scrutinized by use of conventional Proctor compaction apparatus. A series of tests using air-dried sand is conducted to compare with the properties of submerged sand.