It’s spring, the ESRF storage ring tunnel has been emptied of its third-generation girders and that means time for a quick clean-up in the tunnel before installing the new Extremely Brilliant Source (EBS).
Sandrine Rigotti is the civil engineer in charge of sprucing up the tunnel – otherwise known as the civil works.
“It takes a team of 15 people about four to five weeks to complete the civil works in each sector of four cells in the tunnel,” she explains.
The civil works entail:
- – sawing off 35 concrete pillars
- – removing 800 previous concrete girder support plates from the floor
- – filling in trenches with 350 tonnes of concrete
- – sanding and painting the tunnel – a surface of over 12,000 sq m!
- – installing 258 new girder support floorplates – that’s 60 tonnes of steel!
At the same time, outside the tunnel, special lifting gantries will be installed and set up, ready to lower the new EBS girders and equipment into a fresh new tunnel fit for a fourth-generation synchrotron source!