During construction of new facilities where open cuts are not feasible, braced excavations support the ground around foundation excavations to control deformation of adjacent structures, utilities, and soil. Braced excavations range from simple sheeting to complex slurry wall projects protecting sensitive and historic structures.
The excavations can be supported using internal bracing, top down construction where the building floors act as bracing, or using external bracing such as tiebacks. GEI balances empirical experience with sophisticated modeling to evaluate the impacts of a braced excavation on adjacent facilities. Using geotechnical instrumentation during construction allows the project team to evaluate actual versus predicted performance of a system and make adjustments to benefit the project.