03\/10\/2019<\/p>\n<\/div>
Lyon Part-Dieu district renovation project: To-Lyon<\/h1><\/div><\/div>Mainly built in the 60s and 70s with a strong architectural style which was innovative for the time, the La Part-Dieu district in Lyon became the first business district outside the Greater Paris region. In recent years, the original structures have needed a facelift, including expansion of the SNCF station (which was completely saturated), pedestrianisation and new real-estate projects \u2013 all led by the publicly-owned local development company SPL Lyon Part-Dieu.<\/strong><\/p>\n<\/div><\/div>Soletanche Bachy has been involved in several of these projects in the last two years:<\/p>\n
\n- in 2018, the shopping centre, with piles for its expansion,<\/li>\n
- in 2018, the Emergence Lafayette building, with diaphragm walls and piles,<\/li>\n
- in 2018, the expansion of the Vivier Merle tunnel, with diaphragm walls and injections,<\/li>\n
- in 2019, the station \u201cVoie L\u201d track (eastern side), with piles and anchored lutetian-type walls,<\/li>\n
- in 2019, Infragare, with anchors for an existing structure, piles and injections.<\/li>\n<\/ul>\n
All that was left was to launch the district\u2019s flagship renovation project, located just outside the station: an underground space called \u201cParking Place Basse\u201d (shops, bicycle racks and parking spaces on four levels) and the To-Lyon tower designed by Dominique Perrault (170m high, with a 4-star hotel on eight floors and 43 floors of offices).<\/p>\n
Since these two projects are too closely intertwined to be separated, VINCI Immobilier is responsible for completing both structures simultaneously (the underground car park will be subsequently transferred to Lyon Parc Auto).<\/p>\n
After many years, which have seen the Soletanche Bachy and VINCI Construction France teams study numerous dimensioning, phasing and constraint scenarios (particularly for SNCF tracks), the works contract was signed by the partners on 1 August 2019.<\/p>\n
Soletanche Bachy<\/a>\u00a0is responsible, as a VINCI Construction France co-contractor, for retaining structures and foundation works including:<\/p>\n\n- 17,000m2<\/sup>\u00a0of diaphragm walls<\/a>.<\/li>\n
- 67 foundation barrettes for the car park<\/li>\n
- 900 micropiles<\/a> in the lower levelling (15m of borehole + 19m of micropiles)<\/li>\n
- 90 Starsol\u00ae 1.50m (or 1.20m) piles of 25m for the tower<\/li>\n
- 80 cable anchors<\/a><\/li>\n
- 260m\u00a03<\/sup>\u00a0of injection<\/a><\/li>\n<\/ul>\n
After a few test micropiles and anchors in September 2019, the equipment (two wall workshops, two micropile drills, one pile drilling machine) will arrive from January 2020 for two years of work in two phases.<\/p>\n<\/div>
![](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2023\/03\/Vue-DPA-ToLyon.png\" "\\"Vue")
<\/span><\/div><\/div><\/div><\/div><\/div>\n\n<\/div><\/div><\/div><\/div>\n<\/div><\/div>Share the news<\/h3><\/div><\/a><\/a><\/a><\/a><\/a><\/a><\/div><\/div> <\/p>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>Recent news<\/p>\n
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Mainly built in the 60s and 70s with a strong architectural style which was innovative for the time, the La Part-Dieu district in Lyon became the first business district outside the Greater Paris region. In recent years, the original structures have needed a facelift, including expansion of the SNCF station (which was completely saturated), pedestrianisation and new real-estate projects \u2013 all led by the publicly-owned local development company SPL Lyon Part-Dieu.<\/strong><\/p>\n<\/div> Soletanche Bachy has been involved in several of these projects in the last two years:<\/p>\n All that was left was to launch the district\u2019s flagship renovation project, located just outside the station: an underground space called \u201cParking Place Basse\u201d (shops, bicycle racks and parking spaces on four levels) and the To-Lyon tower designed by Dominique Perrault (170m high, with a 4-star hotel on eight floors and 43 floors of offices).<\/p>\n Since these two projects are too closely intertwined to be separated, VINCI Immobilier is responsible for completing both structures simultaneously (the underground car park will be subsequently transferred to Lyon Parc Auto).<\/p>\n After many years, which have seen the Soletanche Bachy and VINCI Construction France teams study numerous dimensioning, phasing and constraint scenarios (particularly for SNCF tracks), the works contract was signed by the partners on 1 August 2019.<\/p>\n Soletanche Bachy<\/a>\u00a0is responsible, as a VINCI Construction France co-contractor, for retaining structures and foundation works including:<\/p>\n After a few test micropiles and anchors in September 2019, the equipment (two wall workshops, two micropile drills, one pile drilling machine) will arrive from January 2020 for two years of work in two phases.<\/p>\n<\/div> Recent news<\/p>\n <\/h2><\/div><\/div><\/div>\n
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<\/span><\/div>Share the news<\/h3><\/div>
\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div>Soletanche Bachy France a \u00e9t\u00e9 mandat\u00e9 pour construire un bassin de stockage \u00e0 Nantes<\/a><\/h3><\/div>
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\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div>ForSHORE: Bachy Balineau Antilles Guyane is involved in the renovation of the port of Jarry, in Guadeloupe!<\/a><\/h3><\/div>
\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div>Rodio Swissboring carries out reinforcement work on the CA04S road in El Salvador<\/a><\/h3><\/div>
\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div>Bachy Soletanche Singapore: Progress on the Construction of Riviera Station<\/a><\/h3><\/div>
\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div>Bratislava Smart City Office: Soletanche Bachy Slovensko, HBM and Soletanche Ceska Republika Collaborate!<\/a><\/h3><\/div>
\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div>New Zealand: March completes work on the Opal Drive Pump Station Project<\/a><\/h3><\/div>
\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div>Soletanche Bachy France: The Livernan Tunnel project is nearing completion after a year of work!<\/a><\/h3><\/div>
\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div>Rodio Swissboring Reconstructs the Titihuapa Bridge in El Salvador<\/a><\/h3><\/div>
\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div>Soletanche Polska Returns for a Second Contract: The Tramway Tunnel Under Warsaw Station<\/a><\/h3><\/div>
\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div>Soletanche Bachy France contributes to the modernization and securing of the Nice-Breil railway line!<\/a><\/h3><\/div>
\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div>Soletanche Bachy strengthens its presence in the United States with the acquisition of Hub Foundation<\/a><\/h3><\/div>
![\"\"](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2025\/01\/Sans-titre-1-2.jpg\")
\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div>![\"\"](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2025\/01\/2021Nov-NCC-ProjCleanLake-145.jpg\")
\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div>