Design and execution of three free-cantilever construction bridges as part of the PPP-Project SAAone in the Netherlands

摘要

The link Schiphol-Amsterdam-Almere along the highways A9-A1-A6 is one of the busiest highway stretches in the Netherlands. At the end of 2012 a contract was awarded to the SAAone JV with participation of Hochtief to extend the capacity of an about 23 km long section of these highways up to 12 lanes, operate it over 25 years and finance the project over the overall period. Client is the Dutch road and waterway authority Rijkswaterstaat. The project scope includes the construction of several large-scale structures. Among those and as consequence of the conversion of the highway junction Diemen three bridges crossing the Amsterdam-Rhine-channel have been constructed. The paper gives a project overview and describes the characteristics and technical challenges with respect to the design and construction of these bridges, erected with the free-cantilever construction method.