Problem:  Lifting and positioning two 2,000 ton cable-stayed bridge pylons into place. To prevent counter-balance issues, it was critical to erect both pylon sections simultaneously and within a very tight tolerance. Any counter-balance issues would have created a lopsided load and put undue stress on the center pillar. The lack of a good footprint and the approximately 100 meter lifting height made the lift almost impossible for two cranes or another lifting solution. The need to lift from the central point of the structure required a high capacity lifting solution that could raise both sections simultaneously from a central point.

Solution:  Four HSL8500 strand jacks were installed on top of a temporary bent tower and simultaneously lifted both pylons up to their permanent position at 75 degrees. GS monitored and controlled the lift using a computer controlled strand jack system supplied by Enerpac. The whole process was completed in 2 days.

Products: HSL8500 strand jacks, 30kw hydraulic power units