Dynamic compaction is a cost-effective technique used for deep ground densification. High energy waves created by the repeated impact of heavy weights compact areas of loose granular soils, uncontrolled fills, or waste materials to increase density and collapse voids.

Dynamic compaction was introduced in the USA by Menard in 1978 after being developed by Menard’s parent company in France and has been used successfully on thousands of projects around the world.

Key Elements

WHAT IS IT?

Invented and developed by Louis Menard, this method employs steel weights, known as pounders, weighing 15 to 40 tons released in free fall from a height of 30 to 120 feet.

HOW DOES IT WORK?

The arrangement and careful calculation of the impact points of the pounders, as well as the other parameters of the treatment (energy, phasing, rest periods), are determined based on the characteristics of the soil and the results of the trial zone.

WHY USE IT?

Stabilize large areas of loose soil or to densify landfill materials. Increase the bearing capacity of granular soils and reduce post-construction settlements.

CMC techniques for soil

Dynamic compaction is performed by repeatedly dropping heavy weights on the ground in a predetermined grid pattern.

Advantages of Dynamic Compaction Include:

  • Simple implementation – no materials are added to the ground
  • Economical, particularly for large-footprint sites
  • Eliminates removal and replacement or traditional foundations such as piling
  • Very low carbon footprint as compared to other forms of ground improvement or traditional foundations
  • Does not generate spoil

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