In this context, detailed geotechnical investigations, a good understanding of the ground behaviour during tunnelling, and a robust design are essential for successful tunnelling in urban areas. We work with international geologists using the latest tools available to fully comprehend and modell the geology and all its specificities.
Our 3D Models made with Leapfrog (an implicit modelling software) allow us to integrate the hydrogeology with the engineering designs. The geology is implicitly modelized directly from the topography and the boreholes and the hydrology from the Piezometric data. From the BIM of the different structures of the project, we can visualize the project. The ground movement, like landslides, can be integrated with the satellite interferometric data we receive when needed. All those data reassembled in one model help the engineer or the owner in their everyday work, especially in the early phases of a project when it changes often. For example, we can visualize the flood area, automatically extract the volume for each lithology of excavated material, estimate the ground settlement along the tunnel alignment, or extract the data directly in an EF software (plaxis, Zsoil, …) for a more nuanced settlement analysis. During the construction phase, the auscultation data can be visualized directly in the model, helping us to understand the ground's behaviour around the excavation and to make the right decisions as quickly as possible.