Initially, the decontamination of the « Stade de France » was not part of the project as the extent of the soil contamination by hydrocarbons was discovered only in later phases. In association with Antea, Menard used a modified version of the atmospheric consolidation technique (Menard Vacuum) to provide a solution to this problem. The system is still in use and regularly pumps the toxic vapours which tend to accumulate with time under the stadium.

The Menard group develops foundation solutions based on ground improvement and reinforcement technologies. Its treatments eliminate the need for the deep foundations traditionally used to support surface structures.

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