The Large Hadron Collider (LHC) at CERN is the world’s largest particle accelerator. In order to increase its potential for future experiments during the next decade still further, the LHC is currently undergoing an upgrading. Doka supplied the crown-arch formwork for four 50 – 70 metre-long crossways, for which three formwork carriages and a large amount of customized formwork were used.
Challenge:
Solution:
Using bolt-on wheel sets form a Doka supporting construction frame. With these, the four elements can be maneuvered accurately inside the tunnel. The bolt-on wheel sets are then removed in the tunnel, and the formwork carriage is set back on its heavy-duty rollers.
Construction period:
2018 - 2022
Switzerland
City
Meyrin
Contractors
Marti Tunnel AG
LHC circumference:
26,659 m
Tunnel diameter
approx. 3.80 m
average depth of tunnel below the earth´s surface:
100 m (min. 50 m, max. 175 m
Operating temperature:
1.9 K (-271,3 °C)
Electricity consumption:
approx. 120 MW
Annual data volume:
50,000,000 GB (=50 PB)
Total construction costs:
approx. CHF 6.5 billion