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Switzerland
Grüeblischachen Bridge
Project description
Grüeblischachen Bridge (01 East and 02 West) in Emmen near Lucerne is a twin highway crossing, which required 22 of its existing pot bearings to be refurbished.
This included the replacement of their PTFE sliding surfaces and renewal of their corrosion protection), and seven other bearings to be completely replaced.
mageba scope
The biggest challenge during the works was presented by the bearings on slender piers in the middle of a river, where access was particularly difficult. But some extra creativity was still needed to find a way to lift the superstructure at these piers because adequate space was not available on top of each pier to place the required hydraulic jacks.
A special solution had to be developed, which involved designing and fabricating a steel “clamp” to be placed around the top part of each pier with its semi-circular parts bolted together to form a strong circular unit.
Following backfilling with grouting mortar, the huge steel clamps were kept in place by friction against the concrete pier, thanks to the tension in the bolts. These steel clamps then supported the hydraulic jacks that lifted the bridge superstructure, enabling the old bearings to be replaced or refurbished.
With the steel elements clamped around the tops of the piers, the superstructure could be lifted by hydraulic jacks
A newly installed RESTON-POT bearing
Key Data
Products: | RESTON-POT bearings, BearingCARE, Lifting and lateral adjustment works |
Installation: | 2024 |
City: | Emmen |
Type: | Highway bridge |
Owner: | ASTRA Zofingen |
Contractor: | Anliker AG Bauunternehmung |
Engineer: | dsp Ingenieure + Planer AG |
