DYNAMIC COMPACTION (DC)

TECHNIQUE:

The Dynamic compaction technique achieved deep ground densification using the dynamic effects of high energy impacts resulting from the drop of large pounders. The technique was invented and developed by Mr. Louis MENARD. Since the late 60’s, the MENARD Company has applied this technique to thousands of sites for different types of structures and soil conditions (port and airport platforms, heavy storage, buildings and landfills).

The basic principle behind the technique consists in the transmission of high energy waves through a compressible soil layer in order to improve its geotechnical properties. Dynamic compaction is usually associated with an intensive in situ-testing program in order to verify that the required improvement has been achieved.

Dynamic compaction is applicable in any type of granular soils. This technique is particularly well-adapted for non-organic heterogeneous fill, made ground and reclamation areas with variable characteristics, even with the presence of large blocks. Dynamic compaction is effective in both unsaturated and saturated soils below the water table.

ADVANTAGES:

  • Increases the bearing capacity of granular soils.
  • Reduces post-construction settlement.
  • Increase density and collapse existing voids.
  • Reduces the volume of landfills.
  • Highly economical and can be implemented for large sites.