Décontamination de sols pollués

Soil decontamination projects are quite complex. One method consists in containing the soil within an impervious steel sheet pile wall that prevents the migration of pollutants present in the soil.

Usually a decontamination procedure is made of a few execution phases:

• the area to be decontaminated is surrounded with an impervious sheet pile wall,
• the contaminated soil is excavated till the non-contaminated layer is reached,
• the contaminated soil is transferred to a plant for treatment, or is treated on site,
• after treatment, the soil returns to the site,
• the sheet pile wall can be removed and re-used.

The whole area can be treated in a single phase, or can be subdivided into several smaller cells that will be treated one after the other. In the latter option, the same steel sheet piles can thus be reused one or more times on the same site.

No waste remains on site once the steel sheet piles have been removed.