Geophysical Engineering
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What are geophysical engineering services?
Geophysical engineering uses measurement methods that investigate the subsurface without excavation. Seismic refraction and MASW produce a shear-wave velocity profile used for seismic site classification; electrical resistivity tomography (ERT) maps groundwater, fill boundaries and voids; ground penetrating radar (GPR) images rebar, voids and buried utilities inside concrete; microtremor measurement gives the predominant site period. These methods complement boreholes in site investigation, support pre-excavation planning on archaeological sites, and narrow targets in mineral and groundwater exploration.
When you need it: soil investigation for a building permit, rebar and void detection in an existing structure, buried utility checks before digging or coring, archaeological survey, slope and fill assessment, groundwater exploration.
Ask when comparing quotes: which method for which depth, how many profiles or lines will be measured, are processing and interpretation included, in what format is the report and who signs it, is the instrument calibration current.