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Implenia wins £51M CERN tunnelling contract

The European Laboratory of Particle Physics (CERN) has awarded Implenia the contract for its flagship upgrade project - the High Luminosity Large Hadron Collider.

The €58M (£51M) contract includes building an underground network of galleries connected to the existing tunnels at CERN’s Large Hadron Collider (LHC). Access to the galleries will be provided by a new 60m deep shaft, at the foot of which a cavern will be created for technical infrastructure.

Implenia is also building an underground power converter gallery, service galleries and safety exits.

According to Implenia, this tunnel and foundation engineering project is made challenging by the geology and by the proximity of ongoing CERN operations.

In a statement, Implenia said: “In order to avoid disturbing the client’s technical equipment, vibrations generated by both the underground and surface work, has to be kept to a minimum. Hence, Implenia will use electric-powered excavation machinery. As well as reducing vibrations, this machinery produces no exhaust fumes.”

Implenia is leading the contract as part of a consortium, and will be technical lead and lead manager. It has a 60% stake in the consortium, while its partner Baresel has the remaining 40% share.

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