South River Tunnel Pump Station Slipform - Atlanta, Ga.
City of Atlanta
Design and Construction
The team of T. E. Ibberson Company (TEI), Kiewit and Western Summit Constructors were awarded the contract to upgrade the water/wastewater infrastructure for the City of Atlanta. The project included the construction of a new underground pump station shaft with a finished diameter of 50 feet high and over 175 feet deep.
Slipforming was the preferred method of construction that lined the excavated shaft with a three-foot-thick (nominal) reinforced concrete wall. This reduced the overall construction schedule by several months and added safety of a full custom engineered work platform with the quality of a monolithic concrete pour without the need for costly construction joints and water stop.
The slipform was suspended by strand jacks mounted on a structural steel head frame located over the shaft, allowing for multiple use of suspended platform, as opposed to the “one-time-only” upward movement of a conventional slipform, resulting in: