Pyramid Geophysical Services

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Seismic (MASW) Surveys to Investigate Top of Rock

MASW top of rock

One of the most common applications of near-surface seismic testing is to identify the depth of the top of a bedrock unit in the subsurface. The two most effective seismic methods associated with this application are: 1) Seismic refraction, and 2) Multi-Channel Analysis of Surface Waves (MASW). Most people who are … [Read more...]

Filed Under: Case Studies Tagged With: geophysics, MASW, north carolina geophysics, seismic, shear wave, top of rock

Slope Stability Analysis Using Geophysics

void under road

Pyramid Geophysical Services was contracted to assist in a comprehensive evaluation of subsurface geologic and hydrogeologic conditions along a causeway in South Carolina. The causeway was experiencing slope failures and ground collapses. These failures were thought to be the result of both the presence of buried … [Read more...]

Filed Under: Case Studies Tagged With: electrical resistivity, electromagnetic, GPR, ground collapse, MASW, seismic, slope geophysics, slope stability analysis, voids

Seismic Services

Example of performing a Multi-Channel Analysis of Surface Waves (MASW) shear wave velocity data collection

Multi-Channel Analysis of Surface Waves (MASW) Pyramid staff have taken advantage of this relatively new technique in the recent past for the purposes of geologic mapping, identifying depth to rock, analyzing subsurface velocity and density profiles, and geotechnical investigations. We utilize the Geometrics Geode … [Read more...]

Filed Under: Services Tagged With: EM, MASW, MER, Multi-Channel Analysis of Surface Waves, Seismic Refraction

Seismic Site Classification

MASW shot for shear wave analysis

Pyramid Geophysical Services conducted a geophysical investigation across a proposed apartment complex property in Charlotte, NC.  This survey was performed to determine average shear wave velocities in the upper 100 feet of the subsurface to provide seismic data to the client for the purposes of determining a seismic … [Read more...]

Filed Under: Case Studies Tagged With: MASW, north carolina geophysics, seismic site classification, shear wave, Vs(100), Vs(30)

Certifications and Affiliations

GSA Contract

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AFFILIATED COMPANIES

LPT Systems

Provider of lubrication, pump and tank systems and equipment, sales and service

Pyramid Environmental Services

Pyramid Environmental is our Parent Company

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503 Industrial Avenue, Greensboro, NC 27406

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