The Brunnholen Highway Bridge in Norway is a geotechnically-challenging project. Complicating factors include ø914 mm drilled steel pipes, large lengths to solid rock and difficult soil conditions. Steel pipe piles are drilled with a full face symmetric drilling system with reversed circulation. The piles are drilled through layers of fill, sand and gravel, stiff clay, stiff moraine, soft rock and at least 1.5 m into solid rock.
The pile design is based on Eurocode 7 with use of soil-structure interaction calculations with soil springs as defined by API.
Subjects: None provided
Author: Arne Schram Simonsen and Vetle Kolberg Stene
Publisher: DFI, EFFC