Dynamic Compaction


The Dynamic Compaction technology, also known as dynamic consolidation, is a technology invented and developed by Menard. This technology was extensively tested and optimised hence its safe and economic application today.

The basic principle behind the Dynamic Compaction (DC) technique consists in the transmission of high energy waves in order to improve weak subsoil. As a result of the impact the soil is compacted depending on its condition, structure and depth. The energy is transferred to the subsoil by multiple impacts with properly shaped weight (normally steel pounder) with a weight ranging from 10 to 40 tons free falling from a height ranging from 5 to 40 m.

In order to perform an effective dynamic consolidation the lattice - boom cranes are used obtaining sufficiently high impact energy. 
The Dynamic Compaction method consists of two pounding stages where in the first stage deep layers are compacted and in the second stage intermediate layers. After completion of the two stages the surface compaction (so-called 'ironing') is carried out within the entire improved area.  

The Dynamic Compaction is normally preceded by the development of a test plot where the grid spacing is determined along with the impact energy which is needed to achieve the required compaction, i.e. weight and shape of the pounder and the height of its drop.

Dynamic Compaction is applicable to any kind of non-cohesive soils even in the presence of rocky fraction. This technology is particularly effective with non-organic, heterogeneous fills and in reclaimed areas with different characteristics (in particular, for abandoned landfills, open-pit mines and quarries, uncompacted dumps).

The method is used for improvement of the subsoil under industrial and commercial halls, heavy warehouses, tanks, aprons, road and rail embankments and other large or linear structures. The depth of the compaction most often varies between 3 and 8 m.

Dynamic Compaction can be used for:

  • Airport Runways 
  • Marine Terminals
  • Roads and Roadway Embankments  
  • Treatment Plants
  • Landfills
  • Storage Tanks
  • Buildings and Warehouses
  • Liquefaction Mitigation

High performance & economical: highly effective which makes it economical for improvement of large areas.

Versatility: possible to use this technology for improvement of any non-cohesive soils and unsaturated silty fill.

Simplicity of implementation: this technology does not require material supplies or additional equipment. Successful improvement depends on the proper selection of impact energy.