What it is:
The Menard Vacuum™ process is used in highly compressible cohesive soils to accelerate consolidation. The process creates a depression under an airtight membrane installed over the soil, so stress can be placed on the soil through atmospheric pressure equivalent to 4 m of fill.
How it works:
By installing vertical and horizontal drains connected to a pumping system and an airtight membrane, soil mass is placed under vacuum and water is expelled, thereby generating settling.
Why it’s used:
This process is especially well suited to ocean infill, highway approach fill and dykes, as well as buildings. It can increase structural stability while reducing the height of the topload needed to generate settling. Soil consolidation time is shorter using the Menard Vacuum compared with the conventional drain and topload solution.