Ground Characterization Lab

Ground Penetration Radar

Ground penetration radar (GPR) is a non-destructive geophysical method that uses electromagnetic waves to image the subsurface.
It provides valuable insights into buried structures, archaeological sites, utility mapping, and geological formations.
By analyzing the reflected signals, GPR helps researchers, engineers, and surveyors better to understand the subsurface without the need for excavation.

Multi Channel analysis of surface waves

It is a non-invasive technology that relies on the dispersion of Rayleigh waves to characterise the geotechnical properties of near-surface materials.

MASW is a non-destructive seismic method to evaluate material layer thickness, their shear wave velocity 1D (depth) or 2D (depth or surface location), Poisson’s ratio, and density.
The setup for the MASW testing consists of the following components (along with their specifications):
A 48-channel engineering seismograph (McSEIS-SX 48, OYO, Tokyo).
24 geophones were used to record the seismic waves generated by a 56 kg automatic drop hitter falling from a height of 2 m on a rectangular base plate of 0.09 m2 area.
Software "SEISIMAGER" used for MASW data processing and inversion.

Inclinometer

Horizontal inclinometers – To measure vertical displacements in pavements, approach slabs, soil structures etc.
Vertical inclinometers – To measure lateral movements of embankments and retaining structures