The Controlled Modulus Column is the environment-friendly column for the 21st century. It is used to support slabs-on-grade and embankments on compressible clays, fills and organic soils.

A specially designed auger, powered by equipment with large torque capacity and high static down thrust, displaces the soil laterally, with virtually no spoil or vibration. During the auger extraction process, a column is developed by pressure-grouting to achieve a predetermined stiffness ratio with the surrounding soil. The result is a composite soil / cement column, which acts as a ground improvement system.

Advantages:

- Well adapted to high surface loading conditions and strict settlement requirements.
- Virtually no spoil, thus no need to dispose of contaminated soil.
- Minimum disturbance of the surface layer.
- Uniformly supports slabs-on-grade, thus reducing the required slab thickness and reinforcing steel quantity.
- Economically increases the strength properties and modulus of the in-situ soil.
 

Typical example of CMC design

Controlled Modulus Columns are covered by a transition layer made of compacted granular material.
1 - Heavy Storage
2 - Roof (Metal or Concrete)
3 - Slab on grade
4 - Subbase