Explosive Compaction of Sand Foundation: Laboratory Test

The charge weight, charge placement (in profile) and depth of charges are important factors in design of Explosive Compaction for saturated loose sand. Six laboratory tests have been conducted to investigate the potential of charge weight, charge placement (in profile) and depth of charge in blast densification, Concentrated Charge has adopted in two of them, the others are Decked or Tiered Charges. Variation of cone penetration tests and ground profile changes were measured. The results of laboratory tests prove the decked and tiered charges are more effective for ground treatment in explosive compaction, more specifically, the more uniform distribution of energy input, the more effective for ground treatment. However, the effective limits of these relationships have not been well defined in qualitative guidance.