A.H. Beck installs drilled shafts to support Interstate 4/Crosstown Expressway Connector in Tampa, Florida.
A. H. Beck Foundation Company installed drilled shafts to support the many bridges of the Interstate 4/Crosstown Expressway Connector (a limited-access, elevated toll road connecting the Lee Roy Selmon Crosstown Expressway to Interstate 4 in Tampa, Florida). Construction of the drilled shafts required 5 drill rigs working around the clock to install 1,200 shafts with diameters ranging from 36 inches to 90 inches in diameter. With highly variable subsurface soils (predominantly sands and clays overlying a Karst Limestone formation), the foundation depths ranged from 40 to 150 feet. This unpredictable subsurface created construction challenges. A. H. Beck used a method of sectional, temporary steel casings to stabilize the overburdened soils. This process allows additional temporary casings to be added, thus ensuring a stabile shaft.