Geophysics

Seismic refraction is an efficient method routinely used for civil engineering projects to profile bedrock and the thickness of overlying soil layers. The seismic compressional wave velocity values measured by this technique can be used to calculate moduli (strength) values of subsurface materials and to make general material identification. This information can be used to evaluate excavation techniques, identify sinkholes, landslides and embankment failures as well as provide critical top of rock and soil information for project designers.

NDT Corporation Projects:

  • Brooklyn Bridge - Seismic Retrofit Data
  • Port of Miami Tunnel – Geotech Data for Feasibility Study
  • Table Rock Resevoir, Top of Rock Profiling - SC
  • Sinkhole Investigation - Little Falls, NJ
  • Conduit Crossing Profiling - Pequonnock River, CT
  • Top of Rock Profiling - Airport - Rutland, VT
  • Top of Rock Profiling - Metro North RR Tunnel - NY
  • Top of Rock Profiling - I-95 Micro-Tunneling - CT
  • Seismic Retrofit Data – Brooklyn Bridge, NY
  • Peat Mapping – Route 44, Carver, MA
  • Sinkhole investigation – Puerto Rico
  • Ground Resistivity Survey - MA
  • Failure Analysis - RR Embankment Study - NJ
  • Sub-Bottom Profile - River Pipeline - Detroit, MI
  • Profiling - Marine Pipeline - Braintree/Weymouth, MA
  • Top of Rock Profiling - Sewer Line - Concord, NH
  • Top of Rock Profiling - Sewer Line - Sturbridge, MA
  • Top of Rock Profiling - Sewer Line - Charlton, MA
  • Top of Rock Profiling - Route 146 - MA
  • Sinkhole Settlement Study - Chicopee, MA
  • Sinkhole Settlement Study - Cross Bay Bridge - Promenade, NY
  • Sub-Bottom Profile - Lake Zoar - CT
  • Sinkhole Investigation - Hackettstown, NJ