Compaction grouting under railway backfills
As part of the construction of the Bretagne – Pays de Loire high-speed line, Menard was requested to stabilise the ground under the railway backfill.
A drilling campaign showed that the area to be treated was made of fossilised karst filled with sand, which made the ground extremely loose and sub-consolidated.
Menard prescribed a solution consisting of compaction grouting. The method was implemented in two phases: the boring and the installation of grouting tubes, then the grouting of mortar over the whole height of the boreholes.
The grouting was carried out following a precise meshing at depths varying between 5 and 15 m.
![MENARD—SCREENTONE—white](https://www.menard-group.com/wp-content/uploads/sites/3/2021/06/MENARD-SCREENTONE-white.png)
Compaction grouting
![Louverne-_-Highspeed-railway-_Menard Bretagne-Pays-de-Loire HSL Menard](https://www.menard-group.com/wp-content/uploads/sites/3/2021/06/Louverne-_-Highspeed-railway-_Menard.jpg)
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.