Selected Technique:
Dynamic Compaction

Treatment Area:
2 153 m²

After carrying out soil improvement by way of Dynamic Compaction with sand blocks under the foundations and under the slabs on the ground as part of the construction of the plant in 2015, the expansion of the freezer portion in 2017, another phase in 2020 for two new production lines at its plant and finally an expansion phase of the freezer – storage portion in 2021, Menard Canada proposed the same process for this further expansion with an area of 2,153 m2 in order to improve the silty/clayey nature of the soils.

Ground Conditions

The following soil profile was identified in the boreholes:

  • The following soil profile was identified in the boreholes:
  • Compact sand with some silt up to about 2.5 m deep;
  • A silt containing traces of clay, with some silty sand, very loose, down to depths varying from 4 to 5.5 m;
  • Compact sand with some silt until the end of the drilling between 5.50m and 8.50m deep.

The water table was found at a 5.5m depth.

Menard Canada Solution

After the soils were removed and replaced with MG112 sand in line with the foundations and along a grid under the slab. Dynamic Compaction was carried out using a conventional high-energy 4-stage crane. The drop height had been adjusted throughout the process as it was quite close to the existing building. Control tests such as the Cone Penetration Test (CPT) made it possible to verify that the required bearing capacity of 150 kPa for the foundations and 25 kPa for the slab as well as maximum settlements of 25mm were met.

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