Abstract: The subsurface conditions of a chemical factory in Tacheng City, Xingjiang Autonomous Region indicate that the second and third (which has a maximum thickness of 6 meters) layers of loess deposits are collapsible. The foundation soils are required to be improved in order to meet the requirement of the structures. The dynamic compaction technique for the collapsible soil elimination is selected throughout comprehensive ground improvement feasibility study. This paper discusses the determination of the dynamic compaction parameters such as, compaction energy of each drop, number of drops at each point, optimum moisture content of ground to be treated etc. The construction results and the monitoring test results indicate that this method is a successful application in the collapsible loess elimination.

Key words: Collapsible Loess, Dynamic Compaction, Design Parameters, Construction, Monitoring Testing