BOEING NORTH BRIDGE: LESSONS LEARNED IN ACCELERATED BRIDGE CONSTRUCTION

摘要

The Boeing North Bridge is a multi-span girder bridge spanning the Cedar River in Renton, Washington. All aircraft assembled in the Boeing Renton factory get towed over the bridge in order to access Renton Field where the aircraft undergo final inspections before taking-off from the Renton Airport. The design and construction schedule for the bridge was accelerated in order to meet Boeing’s increased production rate and plans for production of the new 737MAX. In response to the accelerated schedule and its impacts on timing of construction activities around environmental work windows and the winter construction season, the new bridge was designed utilizing precast columns, precast crossbeams, and full-depth precast deck panels. This paper summarizes decisions made by the design team to use prefabricated bridge elements along with their perceived advantages. These decisions are then contrasted with the construction methods the Contractor elected to follow along with explanations as to why the methods were elected.