• Ground Improvement
• Illinois DOT
• Hazelwood Schools
• Wentzville
• West Memphis
• St. Peters Rec Plex
• Sheboygan Police Station
• Lange-Stegman
• Kennett
• Bluffton Ethanol
• Wheeler Center
• Earth Retention
• Metrolink
• Warrenton Copper
• MoDot
• Centrum Properties
• Pinnacle Tunnel
• Metropolitan Sewer
• Drilled Shafts
• Pinnacle Casino
• Eads Bridge
• Driven Pile
• MCI WorldCom
• Ameren UE
• Augercast
• Proctor & Gamble
• Micropile
• St. Louis Zoo
• Cupples Station

Service: Vibro Stone Columns
Reconstruction of the Southwest Highway (IL Rte. 7) over LaGrange Road interchange consisted of a bridge replacement, new roadway, and MSE walls. The MSE wall foundations were underlain by two layers of stiff clay sandwiching a layer of very soft, organic clay. A ground improvement system consisting of vibro stone columns was designed by Geo Services, Inc. in order to mitigate the soft clay layer. Subsurface Constructors was the successful bidder for the required ground improvement system.

Ground improvement consisted of installing vibro stone columns using both bottom-feed and top-feed column installation in predrilled holes. Subsurface installed 420 stone columns in approximately 21 working days.

• Owner: Illinois DOT
• General Contractor: Dunnet Bay
• Geotechnical Engineer: Geo Services, Inc./Illinois DOT
• Structural Engineer: Illinois DOT
• Ground Improvement Design/Builder: Subsurface Constructors, Inc.