Compaction Grouting

Compaction grouting is a pressure grouting technique that forms cylinders of grout and densifies the surrounding soils. Global improvement of a volume of compressible soils requires sequencing the grouting work into a series of primary, secondary and even tertiary grid locations.

Compaction grouting is classically used to densify loose sands for liquefaction mitigation or to improve the bearing capacity of the ground.

Compaction grouting is particularly well-adapted to liquefaction mitigation for the following reasons:

• It increases the density of sandy soils
• It increases the horizontal coefficient of earth pressure at rest
• It induces ageing of the soil by low strain shear deformation

In addition to jet and compaction grouting, Menard undertakes a variety of specialist grouting techniques such as permeation grouting of rocks and soils. These techniques can be utilised for a range of applications from the improvement of dam foundations, waterproofing of tunnels, deep basement located below groundwater level, stabilisation of rock mass and structural underpinning.