geologial, tectonical and geotechnical ahead investigation of the bedding rock
detection of karst zones, cavities, faults, fractures and water pathways in the surrounding rock
possible investigation methods: investigation of the tunnel path from the surface, parallel to the excavation from the tunnel face, succeeding the excavation of the tunnel (before installation of the tunnel lining)
verification of consolidation filling of known voids/cavities
Result of the 3D loalization of a cavity close to the tunnel tube
Cavity detection using gravimetry inside a tunnel
Radar measurements from angled boreholes around a tunnel tube
References
2018: Karst exploration along the path of the Divaca-Koper tunnel using borehole radar
2018: Karst exploration of the emergency drives of the Lämmerbuckel Tunnel (Stuttgart 21) using borehole radar
2016 – 2017: Karst exploration of the Boßler Tunnel (Stuttgart 21) using borehole radar and gravimetry
2014 – 2016: Karst exploration of the Steinbühl Tunnel (Stuttgart 21) using borehole radar and gravimetry
2008 – 2009: Karst exploration of the Osterberg Tunnel using geoelectrics
2005 – 2007: Karst exploration of the Katzenberg Tunnels using borehole radar
