Project Description

Dynamic Replacement combines Dynamic Compaction and Stone Columns techniques. It improves the bearing capacity of poor soils and reduces settlements.

Dynamic replacement | MENARD

Presentation and key elements

What is it?

This method combines dynamic compaction and stone columns techniques by creating large-sized dynamic replacement inclusions with high internal shear resistance. In this application, the tamping energy drives granular material down through the compressible soils to form large-diameter reinforcement columns (with column diameters ranging from 2 m to 3.5 m).

When and why use it?

If the ground cannot be dynamically compacted directly due to high fines content within the soil, a granular material must be added. This technique is well suited to highly compressible and weak soils and can be applied to structures with high loading (high embankment, storage tanks, etc.). It improves the bearing capacity of the poor soils and the subsequent reduction and control of total and differential settlements. An additional benefit is that dynamic replacement pillars allow for rapid drainage of the ground.

💡 Menard’s tip

The technique can be carried out with or without pre-excavation!

CMC techniques for soil

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