f 3D seismic tomography for subsurface tunnel preliminary studies in Barcelona

Drilling galleries with tunnelers is subjected to strict technical requirements. The anticipation of<br>obstacles in advance of the tunnelling is essential to the operations and the in-site day-by-day safety.<br>The recognition of the fractured zones and the circulation of water are the objectives of this<br>methodology combining high-resolution seismic and 3D tomography.