SuperPile 2017 Online Proceedings, (DFI)
Tapered Piles Driven in Variable and Aggressive Soils
Matthew Riegel, P.E. and Britain Materek, P.E.
The Skanska/Kiewit/ECCO III team (SKE) in association with HNTB was awarded the design-build contract for Phase I of the Kosciuszko Bridge Replacement Project. As lead designer for the SKE team, HNTB was responsible for design of the foundations replacement of the Kosciuszko Bridge over Newtown Creek 1.1-mile structures to replace the existing, structurally obsolete bridge. Phase 1 of the project involves the design and construction of the new eastbound structures of Interstate 278 and the project runs between Brooklyn and the Long Island Expressway Interchange in Queens . The new cable-stayed bridge will be constructed parallel to and on the eastbound side of the existing structures and will carry both eastbound and westbound traffic until Phase 2 is completed, which will include design and construction of a second cable-stayed bridge in the footprint of the existing Kosciuszko Bridge. Piled foundations deriving their capacity through friction and end bearing in the glacial soils overlying the Raritan Clay were predominantly chosen as the preferred method to support the new bridge. 18-inch diameter steel tapered pipe piles were selected to support most abutments and 15 of the 17 pier foundations for the bridge structure. Piles were reinforced to the taper tip and reinforced. This paper and presentation will detail the design and installation challenges associated with analyzing, driving and testing (static and dynamic) this pile system in a variable geologic deposit where the soils above the 10 to 40 foot deep groundwater are highly aggressive resulting in a fully sacrificial steel shell.
|article #2679; publication #1031 (SP-2017)|