GC01 batch of the Lyon metro explained
28 March 2022Presentation of the GC01 batch of the Lyon metro on March 8r
During the 08/03/2022 session of the “Tuesdays of the AFTES” in Lyon, the regional delegation had the pleasure to welcome Alain RICHELY (IMPLENIA’s Regional Operations Director for France) and Arnaud HOCHART (IMPLENIA’s Geologist), in order to present the progress of the construction site of the GC01 batch of the Lyon metro.
It must be said that the program, very complete, allowed to put forward the particular context of the project with a very precise description of the geology and the sensitivity of the environment.
The major problem of the site is obviously the raw pebbles, which are dreaded soil elements in the Lyon region. Thus, the adaptation of the technique met the digging objectives. In addition, drilling muds were a priority work area.
In the same spirit, the TBM had a hybrid technology that combined the possibilities of conventional containment methods (earth or mud pressure) to adapt to the different terrains crossed.
To find out more, click here to read all the details of this event.
Presentation of the recommendations
Following this presentation, François LAIGLE, Director of Engineering and Rock Mechanics, BG Consulting Engineers, and Chairman of the Technical Committee, presented the AFTES working groups. Then, he gave an update on the new recommendations. Thus, three new publications are planned this year:
– GT6 – AFTES GT6 – ASQUAPRO – wet-mix sprayed concretes for permanent application in underground structures.
– WG27 – Mechanical ventilation of underground structures during construction and rehabilitation.
– WP9 – Recommendation on the protection of extradosed waterproofing and drainage of underground structures.
A great success for the first Tuesday of the AFTES in Lyon!
For this first edition of the AFTES Tuesdays in Lyon, many listeners (about 70 people) were present. A great success for this delocalized event… Next meeting in Lyon : 07/06 and 22/11/2022.
