Antelope Data Center
The Geopier GP3® system provided cost effective support for a 120,000 square foot facility and exceeded pier stiffness by three times the design specification
- Owner: Facebook
- General Contractor: Fortis Construction, Inc.
- Geotechnical Engineer: Terracon
- Structural Engineer: Peoples Associates Structural Engineers
Construction of a two-story data center with a footprint of 120,000 square feet. Maximum column loads were on the order of 450 kips and maximum wall loads of 5 kips/foot.
The subsurface conditions consist of alternating layers of medium dense sand with silt and silty sand and stiff sandy silt. Groundwater was not encountered.
The Geopier GP3® system was selected to provide a cost savings advantage over excavation and replacement or auger cast piles. The Geopier Rammed Aggregate Pier® (RAP) system was designed to provide an allowable bearing pressure of 8,000 psf, with a total and differential settlement of less than 1-inch total and 1/2-inch differential. The high bearing pressure allowed for reduced footing sizes for cost savings on concrete. Nearly 1,800 Geopier elements with shaft lengths of 8 feet deep were constructed in 37 days. The modulus test confirmed stiffness over three times the design stiffness of 240 pci.