Engineering

We support the investigation of your building ground with geophysical measurements and deliver important information for the foundation and planning of buildings. We detect karstified or loose rock areas, artificial or natural cavities or any other kind of inhomogeneity in the building ground or also in existing building material.

Building Ground

Setup of a borehole seismic survey for the investigation of faults and karst structures

investigation of the geological-geotechnical situation
localization of layer boundaries
localization of inhomogeneities (old buildings, foundations, …)
localization of natural and anthropogenic cavities
measurements from the surface or from boreholes

References

2013 – 2014: Detailed investigation of the karstification grade around the church of Bad Frankenhausen using borehole seismics
2011: Investigation of karstic structures and faults beneath the water reservoir of a pumped storage hydro-power plant using borehole radar and seismic tomography.
2010: Investigation of the karstification grade around the planned abutment of a bridge renewal in Rübeland (Harz mountains) using borehole radar

Road and Railway

Detection of utilities beneath a street
Detection of subrosion zones along a railway line

investigation of the geological-geotechnical situation
localization of natural or anthropogenic cavities and inhomogeneities
measurement fro the surface or from boreholes beside the traffic way
hence conservation and protection of existing infrastructure (buildings, streets, railways) and no or minimized interference or interruption of ongoing traffic

References

2016 – 2017: Investigation of karstic structures along the railway line Wendlingen-Ulm (Stuttgart 21) using borehole radar and gravimetry
2015 – 2017: Detection of subrosion zones along a railway line in Sondershausen using gravimetry
2010: Investigation of subrosion zones along the planned traffic bypass Könitz using radar

Dykes

Comparison of the measured resistivity sections with drill core results
Distribution of the specific resistivities along the planned route of a dyke
Typical setup of a geoelectric profile along the dyke top

investigation of the geological-geotechnical situation of existing dykes or planned construction of flood protection structures
detection of impermeable layers and inhomogeneities for the assessment of the dyke
localization of structural weaknesses of existing dykes for the stability assessment
measurement from the surface on and beside the dyke

References

2017 – 2018: Investigation of the floodplains for extreme flooding events close to Guntersblum using geoelectric tomography
2016 – 2018: Investigation of the dyke and subsurface at Fessenheim using geoelectric tomography

Historic Mining

Borehole tomographic measurements for the detection of cavities from historic mining

detection of areas of loose rock and subrosion due to relicts of historic mining
detection of natural or anthropogenic cavities (drives, shafts, …)
measurement from the surface or from boreholes

References

2018 – 2019: Investigation of historic mining relicts at the edge of a coal mining area using ground penetrating radar and borehole radar
2010 – 2011: Investigation of historic mining relicts beneath the building ground of the new administrativ district office Annaberg/Buchholz using borehole radar
2005 – 2007: Investigation of cavities of historic coal mining near Bronkow using borehole radar, ground penetrating radar and geoelectrics

Building Material

Spalling inside a drainage tunnel
Radargram with high resolution reflectors of steel rebars in a bridge floor
Detection of inhomogeneities in the sustaining walls of a derelict highrise using radar

non-destructive investigation of the building material of existing buildings
detection of fractures/fissures, voids, impurities and water pathways
detection of utilities (cables, pipes, …) and rebars
verification of consolidation filling of known voids

References

2018: Detection of fissures and water pathways in a water reservoir close to Erfurt using ground penetrating radar
2016: Localization of steel rebars in bridge in Osnabrück using high frequency ground penetrating radar
2014: Detection of wall spalling in a drainage tunnel near Dorfhain using ground penetrating radar
2009: Detection of inhomogeneities in the sustaining wall of the U-Turm in Dortmund using ground penetrating radar