Selected Technique:
Controlled Modulus Columns (CMCs)


Treatment Area:
2,500


Danis Construction mandated Menard Canada to provide ground improvement works for the future Contrecoeur fire station, including the soil for the foundations and the slab under the building.

Ground Conditions

A simplified stratigraphic profile was developed for modelling purposes based on Cone Penetration Tests (CPT).

The soil profile was as described below:

  • Deposit of sandy silt to silty sand fill up to about 7 m below the original grade, followed by silty clay to clayey silt up to 28 m below grade.
  • The above was further underlain by glacial till, approximately between 28m and 29m.
  • Lastly, bedrock extending greater than 29 m below grade.

Menard Canada Solution

Menard Canada carried out ground improvement for this fire station project site using an excavator to densify the granular soils to a thickness of 7 meters. A bearing capacity of a minimum of 125 kPa ELS for the conventional foundations of the building, according to the foundation plan transmitted.

  • Factored design ultimate bearing capacity (ULS): 350 kPa
  • A liquefaction potential treated according to a replacement rate of 8%

The five drillings with Piezocone Tests and the associated calculations showed that the criteria were met.

Ground Improvement Being Conducted in Contrecoeur, Quebec

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