Sefi-Intrafor has been working on Line 16 package 1 since May 2018. As the 2024 Olympics draw nearer, Sefi-Intrafor has invested in additional resources to meet the deadlines (2 years of work scheduled for the special foundations) and manage the exceptional dimensions of certain structures.
For this project, the company has even acquired a new machine: the SC-135 Tiger, to handle the very large widths identified in the construction surveys (up to 1.80m, depth: 54m. A French first in terms of dimensions!).
The diaphragm walls of structure 3302, which will serve as the tunnel boring machine access shaft, are now finished! Our teams completed the preliminary backfilling (5,800lm of drilling and approx. 1,000m3 of grouting), before starting work on the diaphragm walls in July. On this same structure, Jet Grouting is still ongoing for the tunnel boring machine’s earth plug (280 columns) and the cross-passage to the tunnel of future Line 16 (183 columns).