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Trafostrasse 1
8180 Bulach
Switzerland
Tel: +41-44-872 40 50
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Kanada
Highway Interchange A40/A73, Quebec
Project description
Just north of Quebec City this project was a strategic redevelopment of highways Felix-Leclerc (40) and Laurentienne (73) interchange.
The interchange is located in the St-Lawrence Lowland part of a rift valley making it one of the rare regions prone to seismic events in the eastern part of Canada. In addition to seismic activity, the climate in Quebec City is known to vary over 40 ⁰C from –17 ⁰C during the winter and over 25 ⁰C during the summer.
Based on these unique conditions, the Ministry of Transport of Quebec opted to seismically isolate this highway overpass increasing safety.
mageba scope
mageba supplied 18 Lead Rubber Bearings (LRB) seismic isolators. However, prior to production two full size prototypes had to go through a very stringent testing protocol, based on CAN/CSA S6-06, S6-14 and AASHTO LRFD.
The protocol included cooling of the two LRB prototypes at –30 ⁰C for 72 hours prior to testing followed by additional testing after another 72 hours of cooling at –8 ⁰C. Making this an unprecedented accomplishment.
Each guided LRB have a vertical load capacity of approximately 3,200 kN.
The bearing after 72 hours of cooling at –30 ⁰C
Prototype testing
Key Data
Products: | LASTO-LRB lead rubber bearings of type S-550 |
Installed: | 2015 |
City: | Quebec |
Structure: | Highway Interchange |
Completion: | 2016 |
Builder: | EBC |
Owner: | Ministére des Transports du Québec (MTQ) |
