Context of the project<\/h2><\/div>Since 2015, an LNG terminal with an annual regasification capacity of 13 billion cu. metres is open in the Port of Dunkirk. The project includes the construction of a platform and marine structures, the LNG terminal itself and connecting structures. Soletanche Bachy was involved in various phases of the project between 2011 and 2013.<\/p>\n<\/div>
<\/div>Description of the project<\/h2><\/div>Bessac and Soletanche Bachy France, in joint-venture with Razel, carried out the “Sea Water Tunnel”, 5 km long and with a 3 m inner diameter. Its purpose is to transport warm wastewater from the Gravelines nuclear power plant to the LNG terminal, where it is used in the regasification process.<\/p>\n
Before starting the operation, the tunnel boring machine spent several months at the Bessac workshops, where it underwent the required adaptations. A new cutting wheel was designed to bore through Flanders clay and installed on the earth pressure balance TBM. Also prior to tunnelling operations, Soletanche Bachy France built the launching shaft (diaphragm walls<\/a> at a depth of 65 metres) and the pumping station.<\/p>\n<\/div>Our solution<\/h2><\/div>The consortium proposed an original alternative solution, combining the pumping station shaft (29 m) with the fallout shaft (16 m), equipped with a flexible slab at the bottom.<\/p>\n
The 50 m deep shaft was excavated with a KS hydraulic rig. The CWS joints were lowered 55 m deep, which represented a world record at the time. The pumping station had a 29 m inner diameter and foundation barrettes.<\/p>\n
The consortium then carried out the earth works and civil engineering works, consisting of:<\/p>\n
\n- The 2 m high capping beam<\/li>\n
- The junction beams forming 3 struts recovering the compression results between the shaft wall and the pumping station wall<\/li>\n
- The pumping station slab, 1 m thick, stabilised with barrettes<\/li>\n
- The shaft draining slab<\/li>\n<\/ul>\n<\/div><\/div><\/div><\/div>
Type of project:<\/h3><\/div>![](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2023\/03\/Ouvrage-portuaire.png\")
<\/a><\/span>Maritime and river structures<\/h4><\/div><\/div><\/div>Location:<\/h3><\/div>France<\/a><\/p>\n<\/div>Subsidiaries of Soletanche Bachy:<\/h3><\/div>Soletanche Bachy France<\/a>, Bessac<\/a><\/p>\n<\/div>Project owner:<\/h3><\/div>EDF\/Fluxys\/Total \u2013 Grand port maritime de Dunkerque<\/p>\n<\/div>
Prime contractor:<\/h3><\/div>Socotec<\/a><\/p>\n<\/div>Joint venture:<\/h3><\/div>Soletanche Bachy France<\/a>, Bessac<\/a>, Razel-Bec<\/a><\/p>\n<\/div>Works period:<\/h3><\/div>05\/2012 – 06\/2013<\/p>\n<\/div>
Types of techniques:<\/h3><\/div>![\"Paroi](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2023\/03\/Diaphragm-wall-copie.png\")
<\/a><\/span>Diaphragm wall<\/h4><\/div><\/div><\/div>![](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2023\/03\/TBM-tunnel.png\")
<\/a><\/span>Tunnel<\/h4><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\n\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>![](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2023\/08\/DSC_3236-\u00a9-BRS-sl.jpg\")
<\/span><\/li>![](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2023\/08\/DSC_2548-sl.jpg\")
<\/span><\/li>![](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2023\/08\/DK-LNG-Aerienne-22-02-131-sl.jpg\")
<\/span><\/li>![](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2023\/08\/CH_20120709_108\u00a9-Cedric-Helsly-sl.jpg\")
<\/span><\/li><\/ul><\/div><\/div><\/div><\/div><\/div><\/div><\/div>Key figures of the project<\/p><\/h2><\/div>
<\/div><\/div><\/div>0<\/span>m<\/span><\/div>long tunnel<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>0<\/span>m3<\/span><\/div>excavation<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>0<\/span>m\u00b2<\/span><\/div>diaphragm wall<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>Relative techniques<\/h2><\/div><\/div><\/div><\/i>See all the techniques<\/span><\/a><\/div><\/div><\/div>- <\/span><\/a><\/span>
Struts<\/a><\/h3><\/div><\/div><\/div><\/div><\/div> Supports for all grounds Soletanche Bachy offers you the benefit of its experience [...]<\/p><\/div>
<\/i>En savoir plus<\/span><\/a><\/div>\n\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t![\"\"](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2022\/05\/CH_20190930_179_Gare-de-Vitry_T2A-vignette.jpg\")
\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div><\/div><\/li>\n- <\/span><\/a><\/span>
Diaphragm wall<\/a><\/h3><\/div><\/div><\/div><\/div><\/div> A Soletanche Bachy expertise A diaphragm wall is a support of excavation technique used by [...]<\/p><\/div>
<\/i>En savoir plus<\/span><\/a><\/div>\n\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t![\"\"](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2021\/01\/CH_20201109_001@1x_1.jpg\")
\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div><\/div><\/li>\n- <\/span><\/a><\/span>
Tunnels<\/a><\/h3><\/div><\/div><\/div><\/div><\/div>
Since 2015, an LNG terminal with an annual regasification capacity of 13 billion cu. metres is open in the Port of Dunkirk. The project includes the construction of a platform and marine structures, the LNG terminal itself and connecting structures. Soletanche Bachy was involved in various phases of the project between 2011 and 2013.<\/p>\n<\/div>
Description of the project<\/h2><\/div>Bessac and Soletanche Bachy France, in joint-venture with Razel, carried out the “Sea Water Tunnel”, 5 km long and with a 3 m inner diameter. Its purpose is to transport warm wastewater from the Gravelines nuclear power plant to the LNG terminal, where it is used in the regasification process.<\/p>\n
Before starting the operation, the tunnel boring machine spent several months at the Bessac workshops, where it underwent the required adaptations. A new cutting wheel was designed to bore through Flanders clay and installed on the earth pressure balance TBM. Also prior to tunnelling operations, Soletanche Bachy France built the launching shaft (diaphragm walls<\/a> at a depth of 65 metres) and the pumping station.<\/p>\n<\/div>Our solution<\/h2><\/div>The consortium proposed an original alternative solution, combining the pumping station shaft (29 m) with the fallout shaft (16 m), equipped with a flexible slab at the bottom.<\/p>\n
The 50 m deep shaft was excavated with a KS hydraulic rig. The CWS joints were lowered 55 m deep, which represented a world record at the time. The pumping station had a 29 m inner diameter and foundation barrettes.<\/p>\n
The consortium then carried out the earth works and civil engineering works, consisting of:<\/p>\n
\n- The 2 m high capping beam<\/li>\n
- The junction beams forming 3 struts recovering the compression results between the shaft wall and the pumping station wall<\/li>\n
- The pumping station slab, 1 m thick, stabilised with barrettes<\/li>\n
- The shaft draining slab<\/li>\n<\/ul>\n<\/div><\/div><\/div><\/div>
Type of project:<\/h3><\/div><\/a><\/span>Maritime and river structures<\/h4><\/div><\/div><\/div>Location:<\/h3><\/div>France<\/a><\/p>\n<\/div>Subsidiaries of Soletanche Bachy:<\/h3><\/div>Soletanche Bachy France<\/a>, Bessac<\/a><\/p>\n<\/div>Project owner:<\/h3><\/div>EDF\/Fluxys\/Total \u2013 Grand port maritime de Dunkerque<\/p>\n<\/div>
Prime contractor:<\/h3><\/div>Socotec<\/a><\/p>\n<\/div>Joint venture:<\/h3><\/div>Soletanche Bachy France<\/a>, Bessac<\/a>, Razel-Bec<\/a><\/p>\n<\/div>Works period:<\/h3><\/div>05\/2012 – 06\/2013<\/p>\n<\/div>
Types of techniques:<\/h3><\/div><\/a><\/span>Diaphragm wall<\/h4><\/div><\/div><\/div><\/a><\/span>Tunnel<\/h4><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\n\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>- <\/span><\/li>
- <\/span><\/li>
- <\/span><\/li>
- <\/span><\/li><\/ul><\/div><\/div><\/div><\/div><\/div><\/div><\/div>
Key figures of the project<\/p><\/h2><\/div>
<\/div><\/div><\/div>0<\/span>m<\/span><\/div>long tunnel<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>0<\/span>m3<\/span><\/div>excavation<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>0<\/span>m\u00b2<\/span><\/div>diaphragm wall<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>Relative techniques<\/h2><\/div><\/div><\/div><\/i>See all the techniques<\/span><\/a><\/div><\/div><\/div>- <\/span><\/a><\/span>
Struts<\/a><\/h3><\/div><\/div><\/div><\/div><\/div> Supports for all grounds Soletanche Bachy offers you the benefit of its experience [...]<\/p><\/div>
<\/i>En savoir plus<\/span><\/a><\/div>\n\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div><\/div><\/li>\n- <\/span><\/a><\/span>
Diaphragm wall<\/a><\/h3><\/div><\/div><\/div><\/div><\/div> A Soletanche Bachy expertise A diaphragm wall is a support of excavation technique used by [...]<\/p><\/div>
<\/i>En savoir plus<\/span><\/a><\/div>\n\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div><\/div><\/li>\n- <\/span><\/a><\/span>
Tunnels<\/a><\/h3><\/div><\/div><\/div><\/div><\/div>
Bessac and Soletanche Bachy France, in joint-venture with Razel, carried out the “Sea Water Tunnel”, 5 km long and with a 3 m inner diameter. Its purpose is to transport warm wastewater from the Gravelines nuclear power plant to the LNG terminal, where it is used in the regasification process.<\/p>\n
Before starting the operation, the tunnel boring machine spent several months at the Bessac workshops, where it underwent the required adaptations. A new cutting wheel was designed to bore through Flanders clay and installed on the earth pressure balance TBM. Also prior to tunnelling operations, Soletanche Bachy France built the launching shaft (diaphragm walls<\/a> at a depth of 65 metres) and the pumping station.<\/p>\n<\/div> The consortium proposed an original alternative solution, combining the pumping station shaft (29 m) with the fallout shaft (16 m), equipped with a flexible slab at the bottom.<\/p>\n The 50 m deep shaft was excavated with a KS hydraulic rig. The CWS joints were lowered 55 m deep, which represented a world record at the time. The pumping station had a 29 m inner diameter and foundation barrettes.<\/p>\n The consortium then carried out the earth works and civil engineering works, consisting of:<\/p>\n France<\/a><\/p>\n<\/div> Soletanche Bachy France<\/a>, Bessac<\/a><\/p>\n<\/div> EDF\/Fluxys\/Total \u2013 Grand port maritime de Dunkerque<\/p>\n<\/div> Socotec<\/a><\/p>\n<\/div> Soletanche Bachy France<\/a>, Bessac<\/a>, Razel-Bec<\/a><\/p>\n<\/div> 05\/2012 – 06\/2013<\/p>\n<\/div> Key figures of the project<\/p><\/h2><\/div> Supports for all grounds Soletanche Bachy offers you the benefit of its experience [...]<\/p><\/div> A Soletanche Bachy expertise A diaphragm wall is a support of excavation technique used by [...]<\/p><\/div>Our solution<\/h2><\/div>
\n
Type of project:<\/h3><\/div>
<\/a><\/span>Maritime and river structures<\/h4><\/div><\/div><\/div>
Location:<\/h3><\/div>
Subsidiaries of Soletanche Bachy:<\/h3><\/div>
Project owner:<\/h3><\/div>
Prime contractor:<\/h3><\/div>
Joint venture:<\/h3><\/div>
Works period:<\/h3><\/div>
Types of techniques:<\/h3><\/div>
<\/a><\/span>Diaphragm wall<\/h4><\/div><\/div><\/div>
<\/a><\/span>Tunnel<\/h4><\/div><\/div><\/div>
<\/span><\/li><\/span><\/li><\/span><\/li><\/span><\/li><\/ul><\/div>Relative techniques<\/h2><\/div><\/div><\/div>
Struts<\/a><\/h3><\/div>
\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div><\/div><\/li>\nDiaphragm wall<\/a><\/h3><\/div>
\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div><\/div><\/li>\nTunnels<\/a><\/h3><\/div>
![\"\"](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2020\/05\/CH_20160624_016_Tram-de-Nice_@Cedric-Helsly-e1576572244115.jpg\")
\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n<\/div><\/div><\/li>\n<\/ul>![](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2023\/09\/CH_25012011_014_Digue-Cusset_C.Helsy-vignette.jpg\")
<\/a><\/span><\/div><\/div><\/li>\n