{"id":16123,"date":"2019-10-14T14:13:43","date_gmt":"2019-10-14T12:13:43","guid":{"rendered":"https:\/\/www.soletanche-bachy.com\/retour-sur-les-travaux-castor-realises-cet-ete-sur-le-rer-c\/"},"modified":"2023-11-13T18:19:57","modified_gmt":"2023-11-13T17:19:57","slug":"a-look-back-at-the-castor-works-done-this-summer-on-the-rer-c","status":"publish","type":"post","link":"https:\/\/www.soletanche-bachy.com\/en\/a-look-back-at-the-castor-works-done-this-summer-on-the-rer-c\/","title":{"rendered":"A look back at the CASTOR works done this summer on the RER C"},"content":{"rendered":"

14\/10\/2019<\/p>\n<\/div>

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A look back at the CASTOR works done this summer on the RER C<\/h1><\/div>
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After a year off in 2018, the Soletanche Bachy France<\/a> jet grouting rigs were at work again this summer in the RER C tunnel. This 23rd campaign of work on Castor took place on the western branch of the RER C for the first time, between the stations of Les Invalides and Pont de l’Alma, on behalf of SNCF R\u00e9seau. We look back at six months of preparations for three weeks of intensive work.<\/p>\n<\/div>

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Preparatory work<\/h2><\/div>

In March, the first installations began on the quayside at the Port du Gros Caillou, in the 7th arrondissement. To make things more interesting this year, not all of the site was available until after the end of the Formula E championship, 100% electric single-seater races (whose logistics base is located on the embankments of the Seine).<\/p>\n

In April, the first works took place in a tunnel at night, while no RER trains were running. The teams needed to prepare the tunnel by installing electric cables, water supplies, jet pipes and decking.<\/p>\n

In May and June, on the embankments of the Seine, the worksite offices were installed to house the 200 contractors over the summer, as well as the grouting plants. Unusually this year, a delivery of cement came by river. The installation therefore needed to be completely redesigned and adapted to this way of functioning, particularly by adding a filter to absorb the dust generated by unloading of the barges.<\/p>\n

On 15 July, traffic was suspended after the last RER C train and work began on the tracks. TSO (an independent contractor) cut, dismantled and removed the track panels in 18m sections. They then laid nearly 3,000 tonnes of ballast. Once this had been completed, the jet grouting began.<\/p>\n<\/div>

Jet grouting works<\/h2><\/div>

The RER C line dates back to the beginning of the 20th century when it was built for the Paris Exposition Universelle (world fair). Reinforcement of the structure by jet grouting<\/a> is required due to damage caused by:<\/p>\n