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ROCKY CREEK BRIDGE
Location:California, USA Description:Rocky Creek Bridge is one of the historic concrete arch bridges built in the 1930’s. It is 151 m. Owner and Client:Caltrans Scope of Work:Buckland and Taylor Ltd., was selected by Caltrans to design the seismic retrofit of this bridge to a site specific spectrum corresponding to a maximum credible earthquake. The exterior appearance remained unaltered in order to preserve the original character of the arch bridge. The retrofit design calls for a post-tensional deck to render it continuous with new end abutments and post-tensioned towers. The arch ribs are supported by special shear keys at the two center spandrels. The tower bases are stabilized by means of post-tensioned and passive tiedowns. Environmental concerns allowed only minimal impact on the immediate surroundings and dictated an environmentally sensitive construction process. The construction sequencing and phasing were developed to permit uninterrupted traffic during the entire construction phase.
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