Variation of cptu parameters and liquefaction potential at a reclaimed land induced by dynamic compaction

This paper presents results of an extensive field investigation of a hydraulic-filled site with cone penetration testing before and after ground improvement by dynamic compaction. The focus of the paper is to examine the effect of dynamic compaction on the cone penetration sounding characteristics and liquefaction hazards at the site. The results show that cone penetration testing is an effective tool for investigating the effect of dynamic compaction. The results also show that while significant changes in CPTu parameters are observed after the dynamic compaction, the soil behavior type determined with these CPTu parameters largely remains unchanged. Furthermore, in terms of the two measures of liquefaction hazards, the liquefaction potential index and the liquefaction-induced settlement, the risk is significantly reduced by the dynamic compaction.