Designing solutions with our comprehensive knowledge of soil and rock behavior, geology, groundwater flow, and earth science.
Founded as a geotechnical engineering firm in 1970, GEI has been an industry leader in the application of geotechnical principles to achieve safe, economical and practical projects. We are highly experienced in investigating, evaluating and navigating the risk and uncertainty of the underground to overcome challenges presented to both routine and complex projects by variable soil, rock, and groundwater conditions; fast-track schedules; and sensitive adjacent buildings and infrastructure.
GEI works closely with structural engineers, architects, developers, owners and contractors to reduce risks and uncertainties in underground construction.
GEI works with the project team to select and design appropriate foundations and construction techniques for every type of project, ranging from the basic to the most complex and sensitive. We focus on providing the level of performance required by the project while preventing damage to nearby utilities and buildings, resulting in the design of practical, innovative and cost-effective foundations. Our licensed environmental professionals will navigate your project through complex local, state and federal environmental regulations to avoid costly construction delays and unnecessary remediation.
Excavation Support Systems
GEI combines empirical experience with sophisticated computer modeling to evaluate the impacts of excavations and various support of excavation (SOE) systems on existing adjacent buildings and facilities. Using geotechnical instrumentation during construction allows our experts to evaluate actual vs. predicted performance of a system and make the necessary adjustments.
During construction of new structures where open cuts are not feasible, SOE’s support the ground outside excavations to control deformation of adjacent structures, utilities and soil. SOE’s range from simple piles and lagging or sheeting, to complex slurry wall projects protecting sensitive and historic structures. Types of support systems have included but are not limited to cantilever walls, simple braced excavations, tie-back anchored excavations, open-water cofferdams, braced cofferdams constructed in conjunction with existing structures and pre-stressed bracing for structures sensitive to movements.
Complex environments and projects require customized techniques and approaches. GEI provides innovative tunneling techniques in overseeing the design and construction of small and large diameter tunnels and shafts beneath highways, railroads, rivers and wetlands and through congested or contaminated areas. GEI’s tunneling experience ranges from cut & cover tunnels in urban environments for utility and transportation projects, to deep hard rock tunnels for storm water overflow and water storage, Combined Sewer Overflow (CSO) and water conveyance.
GEI has a strong commitment to providing clients with high-quality laboratory testing services for both soil and rock. Our laboratory has achieved national recognition for its ability to perform tests to advance the state of geotechnical engineering. Through our use of state-of-the-art sensors and computer acquisition systems, we measure and record data, and use proprietary software to provide insights.
Our testing capabilities range from classification and index testing, to performing dynamic testing to support seismic and vibration engineering. We offer a wide variety of geotechnical laboratory testing services.
Field Testing and Monitoring
Appropriate field testing and monitoring is essential to achieve consistent, high quality underground construction and to verify that designs are installed as intended. GEI has extensive experience designing and implementing effective, efficient monitoring and testing programs for all types of projects.