Ground Improvement by the In-Tube Deep Dynamic Compaction Method

Abstract

Rammed from the deep layer gradually to the ground surface along the ramming tube can be achieved by the in-tube deep dynamic compaction method, which is a new dynamic compaction construction technique. Based on the field test in Fujian, the reinforcement effect was explored during reinforcement. The test results show that the accumulation of excess pore water pressure during the tamping process can be effectively avoided by the in-tube deep dynamic compaction method, and the excess pore water pressure will dissipate completely after 24 h of dynamic consolidation; The effective depth of foundation treatment can reach more than 13 m depth, the defects of long period of dissipation of excess pore pressure and shallow depth of effective reinforcement in conventional dynamic consolidation method were overcame.