The near-surface geophysical data have become key components in the development of the engineering of major underground structures. Geological and Geophysical Institute of Hungary (GGI of Hungary) carried out a detailed geophysical survey along the twin tunnels of a new Metro line in Budapest, Hungary. Following the tunnel boring activity several sinkholes were detected at the surface along the path of the twin tunnels. GGI of Hungary carried out engineering geophysical soundings (CPTe) and non-invasive seismic technologies (3D seismic tomography) in order to mitigate the potential risk of any material damages in the future. The aim was to get to know the physical parameters of the soil layers. The joint application of the two methods was able to detect the known and the hidden potential sinkholes using state-of-the-art technology.


Article metrics loading...

Loading full text...

Full text loading...


  1. Hegedűs, E., Kovács, A. Cs. and Stickel, J.
    [2011] Geophysical study of the collapses in the neighbourhood of the Tétényi Street 32, Budapest in conjunction with the Metro-4 project. GGI of Hungary unpublished report.
    [Google Scholar]
  2. Kovács, A. Cs., Guthy, T., Csabafi, R., Török, L., Hegedüs, E. and Stickel, J.
    [2012] Shallow geophysical investigations above the new twin underground tunnel in Budapest using 3D tomography and CPT. Conference and Exhibition on Earth Sciences and Environmental protection, Miskolc.
    [Google Scholar]

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error