In order to implement the best possible soil treatment, several drilling and grouting test plots were carried out. It should be noted that this type of work is very unusual, with major technical requirements including the vertical nature of the boreholes and the grouting of several grouts with variable viscosity.
The first rock-treatment phase between 0m and 70m has been completed and the deep grouting (70m to 135m) are now in progress. This operation, requiring three drilling workshops in three positions, will take several more months to complete and to secure the execution of the work of raise-boring.
For our teams, this is a complex project with many technical and environmental requirements. In fact, before the beginning of the works, an acoustic and thermal shed has been set up to protect the environment from noise pollution and allow the teams to work sheltered from the region’s harsh weather.