Geophysical Investigations
Geophysical investigations enable non-invasive subsurface exploration through advanced measurement methods that provide information on the geological structure, stratigraphy, and physical as well as mechanical properties of the foundation soil. They are conducted from the ground surface, in boreholes or excavations, using a combination of sources and sensors.
Our team applies modern geophysical investigation methods tailored to various research objectives, geological conditions, and project requirements.
Applied methods:
- seismic refraction — the analysis of elastic wave propagation through the soil to determine the depth of layers and boundaries between materials of different properties;
- electrical resistivity tomography (ERT) — the measurement of soil electrical resistance to identify structures, cavities, and zones of increased porosity;
- multichannel analysis of surface waves (MASW) — the modeling of shear wave velocities in the soil and creating 1D, 2D, and 3D subsurface profiles; and
- ground-penetrating radar (GPR) — the detection of cavities and underground utilities.
Geophysical investigations are used for:
– determining the boundary between overburden and bedrock;
– soil classification (Vs30);
– defining dynamic soil parameters for seismic design;
– detecting cavities and fractured zones; and
– positioning future wells or hydrogeological structures.
Our expertise in combining different geophysical methods enables precise analysis and provides reliable foundations for further engineering decisions.