Champlain Bridge (New)
Location: Montreal, QC Contract Value:
The new Champlain Bridge is a 3.4 kilometer long cable-stayed structure with 215 meter main span located in Montreal, QC constructed of composite precast deck panels and steel frame superstructure. We completed the design of six hydraulically actuated hanger bars which were inserted into pockets provided in the precast concrete pier segments. Because of the unique shape of the large prefabricated steel pier components, weighing up to 230 tonnes, a customized turning frame and rigging arrangement were designed to allow handling and rotation from horizontal to vertical orientation for final installation. The large A-Frame and kingpost were available temporary structures provided by others which had to be utilized to accelerate the main span erection schedule. Erection of the main span using a gantry system had been delayed and therefore the 40-metre-tall A-frames and 37-metre-tall kingposts for the temporary cable stayed tie-back system were required to allow erection to occur on two fronts. Somerset was responsible for the structural strength and stability analyses for these temporary structures during lifting and installation procedures.
