EXCAVATION SUPPORT SYSTEMS
An industry leader in earth-retention systems and high-performing specialty foundations, Schnabel provides reliable excavation shoring systems for diverse environments.
Excavation shoring systems are used to support the sides of an excavation so adjacent structures, streets, and utilities are undamaged.
Schnabel provides specialized excavation shoring systems (ESS) to accommodate the wide variety of subsurface conditions present throughout the United States.
A leading Geostructural Design & Construction contractor, Schnabel has the expertise to provide reliable excavation support systems for your project.
EXCAVATION SUPPORT SYSTEM SOLUTIONS
Also known as shoring, excavation support systems (ESSs) are designed to support the ground behind an excavation. The excavation support system may also be designed to resist groundwater pressure, building loads, construction traffic, roadways, railroads, and many other types of surcharge loads.
Excavation shoring may be used to temporarily support the excavation until a new structure is built. It can also be designed to permanently support the excavation. Permanent excavation shoring systems differ from temporary shoring in that many of the components in permanent shoring incorporate protection from long-term corrosion.
The best type of excavation shoring for a particular project depends on a number of factors including soil conditions, required stiffness, and whether or not a groundwater cut-off is required.
Excavation support systems provided by Schnabel include soldier piles and lagging, soil nailing, secant/tangent piles, deep soil mix walls, and sheet pile walls. Lateral support for the excavation support system is provided by tiebacks, soil nails, braces or by designing the vertical elements of the shoring to cantilever. Schnabel can design and install the shoring best suited for your project because we have experience in designing and constructing most of the methods currently used in the United States.
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EXCAVATION SUPPORT SYSTEM CASE STUDIES
Capitol Crossing | Washington D.C.
Schnabel designed and installed over 130,000 square feet of excavation support for the Capitol Crossing project in Washington, DC for client Balfour Beatty Construction. Several sensitive structures including the Holy Rosary Church, the Casa Italiana, and a modern office building were supported by a combination of conventional hand-dug underpinning pits, bracket piles, and stiff SASM walls.
Reston Row East Promenade Garage | Reston, VA
Schnabel designed and installed a temporary excavation support system for client Davis Construction to facilitate the construction of five-level underground parking garages. In this project, Schnabel installed 120,000 SF of sheeting with over 1,000 temporary tiebacks. The project which took place during the COVID-19 pandemic was completed safely, on budget, and to the client’s content.
The Capitol Crossing project was one of the most complicated excavation shoring jobs in Schnabel’s history. The use of stiff single auger soil mix SASM walls based on deflection-based design resulted in the successful performance of the support of excavation adjacent to some historic and modern structures.
