![\"\"](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2025\/12\/05-Grand-Palais-700x441.png\")
<\/a><\/li><\/ul><\/div>dparmentier<\/a><\/span><\/span>2025-12-17T11:52:10+01:00<\/span>[Ingenious Podcast] \u201cInside the Grand Palais: Mission Stability\u201d<\/a><\/h4>
20\/02\/2020<\/p>\n<\/div>
<\/div>Soletanche Bachy France has been awarded as part of a consortium, for the \u201cFoundation\u201d package for the new Mirabeau Tower in Marseille<\/h1><\/div>
Soletanche Bachy France has been awarded as part of a consortium, for the \u201cFoundation\u201d package for the new Mirabeau Tower in Marseille<\/h1><\/div><\/div>The consortium was able to listen and develop its offer to respond in the best way to the needs of the project.<\/strong><\/p>\n<\/div><\/div>The consortium Soletanche Bachy France<\/a> (lead company) and InterTravaux wins the \u201cFoundation\u201d package of the Mirabeau Tower in Marseille. It is a high-rise building<\/a> with 21 floors, standing at 85m, above seven basement levels and offering 170 parking spaces. The project led by CMA-CGM and Bouygues Immobilier, is in particular intended to house the new CMA-CGM head office, whose staff will ultimately occupy half of this new building.<\/p>\nThe \u201cFoundation\u201d package includes the diaphragm wall<\/a>, earthworks, struts<\/a>, dewatering and decontamination.<\/p>\n<\/div>![](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2020\/02\/Future-Tour-MIRABEAU_architecte-Hala-Warde@1x_1-big.jpg\" "\\"Future")
<\/span><\/div>The work to be carried out<\/h2><\/div>The works are to be carried out on a reduced plot of 1,300 sq. m corresponding to the current Mirabeau Tower (nine floors) which is undergoing demolition.<\/p>\n
This package involves a 22m excavation protected by a 1m-thick diaphragm wall, anchored 32m deep in Marseille\u2019s Lower Oligocene strata.<\/p>\n
Construction of the diaphragm wall will begin after demolition of the current tower (excluding slab and piles) and after backfilling up to a height of 2m in order to clear the water table. The diaphragm wall should take three months, in two shifts.<\/p>\n
The presence of the adjoining boundaries will require complete instrumentation monitoring, entrusted to Sixense<\/a> (a company of Soletanche Freysinet<\/a>).<\/p>\nOnce the walls are complete, a critical phase of this package will begin in summer 2020, when teams will need to carry out the following activities:<\/p>\n
\n- removing the diaphragm wall construction equipment,<\/li>\n
- decontamination of water and soil (oil pollution around the site of the former heating plant),<\/li>\n
- preliminary earthworks and trimming,<\/li>\n
- capping beam (in the structural work package),<\/li>\n
- demolition of the old tower\u2019s slab,<\/li>\n
- installation of the dewatering.<\/li>\n<\/ul>\n
This will be followed by earthworks (23,000m3<\/sup>) and the installation in advance of four levels of temporary struts, for delivery of the completed excavation in early November 2020.<\/p>\nThe works have a duration of 8.5 months.<\/p>\n<\/div>
<\/div><\/div><\/div><\/div>\n\n<\/div><\/div><\/div><\/div>\n<\/div><\/div><\/i>Find out more about the diaphragm wall process<\/span><\/a><\/div><\/div>
The consortium was able to listen and develop its offer to respond in the best way to the needs of the project.<\/strong><\/p>\n<\/div> The consortium Soletanche Bachy France<\/a> (lead company) and InterTravaux wins the \u201cFoundation\u201d package of the Mirabeau Tower in Marseille. It is a high-rise building<\/a> with 21 floors, standing at 85m, above seven basement levels and offering 170 parking spaces. The project led by CMA-CGM and Bouygues Immobilier, is in particular intended to house the new CMA-CGM head office, whose staff will ultimately occupy half of this new building.<\/p>\n The \u201cFoundation\u201d package includes the diaphragm wall<\/a>, earthworks, struts<\/a>, dewatering and decontamination.<\/p>\n<\/div> The works are to be carried out on a reduced plot of 1,300 sq. m corresponding to the current Mirabeau Tower (nine floors) which is undergoing demolition.<\/p>\n This package involves a 22m excavation protected by a 1m-thick diaphragm wall, anchored 32m deep in Marseille\u2019s Lower Oligocene strata.<\/p>\n Construction of the diaphragm wall will begin after demolition of the current tower (excluding slab and piles) and after backfilling up to a height of 2m in order to clear the water table. The diaphragm wall should take three months, in two shifts.<\/p>\n The presence of the adjoining boundaries will require complete instrumentation monitoring, entrusted to Sixense<\/a> (a company of Soletanche Freysinet<\/a>).<\/p>\n Once the walls are complete, a critical phase of this package will begin in summer 2020, when teams will need to carry out the following activities:<\/p>\n This will be followed by earthworks (23,000m3<\/sup>) and the installation in advance of four levels of temporary struts, for delivery of the completed excavation in early November 2020.<\/p>\n The works have a duration of 8.5 months.<\/p>\n<\/div><\/div><\/span><\/div>The work to be carried out<\/h2><\/div>
\n
<\/div><\/div><\/div><\/div>\n\n<\/div><\/div><\/div><\/div>\n<\/div><\/div><\/i>Find out more about the diaphragm wall process<\/span><\/a><\/div><\/div>
![\"\"](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2025\/12\/Capture-decran-2025-11-27-154155-700x441.jpg\")
<\/a><\/li><\/ul><\/div>![\"\"](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2025\/12\/DJI_0196-copy-700x441.jpg\")
<\/a><\/li><\/ul><\/div>