Subsurface Explorations & Testing Programs

GZA's geotechnical engineers provide the design expertise to evaluate the engineering parameters and project requirements to provide the most appropriate foundation solution for the project.

GZA has extensive experience in all aspects of the design and construction of temporary and permanent cofferdam cells, deep excavation shoring, earth slope/embankment stabilization, and dewatering systems in a variety of simple to complex geotechnical environments.

Geotechnical instrumentation and deep foundation testing is routinely undertaken for the evaluation of construction effects, especially in urban areas; for verification of design assumptions; and as part of project safety programs. From program management, planning and design, through installation...

GZA understands the risk that unstable soil and rock slopes can present to constructed facilities.

GZA’s experienced geotechnical engineers and geotechnical contractors have planned and completed subsurface investigations and laboratory and in-situ testing to gather the needed data for a wide variety of unstable slope settings from high mountain ridges to deep river valleys and steep ocean-front...

GZA's engineers and geologists perform seismic and earthquake engineering analyses for private and public clients for buildings, power plants (including over 10 nuclear power plants), bridges, highways, dams and tunnels.

With more than 40 years of tunneling experience, GZA provides engineering for design and construction of shafts, tunnels and underground chambers in soil and rock.

We have over 30 years’ experience in the construction oversight of landfill and other heavy civil construction projects to give proper perspective in developing a complete, well-defined design package.

Ground Source Heat Pump (GSHP) systems, also known as geothermal systems, are “green,” sustainable, energy-efficient options for building heating, cooling and hot water production.

Solely focused on the construction industry, GZA’s Contractor Services Division is intimately familiar with the fast-paced complexities of heavy civil, heavy highway, and marine construction projects.