Controlled Modulus Column (CMC)
Menard Canada received the mandate from Borea Construction to carry out soil improvement for the construction of future wind turbines at the Val-ÉO wind farm.
The Controlled Modulus Column (CMC) solution was chosen to reduce settlements and ensure the required bearing capacity under the foundations of 4 wind turbines.
The objective was to improve the thick layer of clay silt in these four locations.
The geotechnical data extracted from the drilling reports indicated the following profile:
• Organic soil: The thickness of the organic soil layer varies from 0 to 600mm.
• Cohesive deposit: The cohesive deposit is mainly composed of clay and silt to silt and clay with traces of sand.
The first 2.4 m of this soil is dense (layer of clay), resulting from the impact of the freeze/thaw cycle. The measured in-situ Cu varies between 36 to 92 kPa. The thickness of this layer varies between 6.2 m to 18.7 m.