Context of the project<\/h2><\/div>The tank was built in the middle of the roundabout at the exit of the Jenner tunnel and is the final part of the anti-flooding programme started by CODAH in 2006, with the Demidoff and Levesque tanks (also built by Soletanche Bachy).<\/p>\n<\/div>
Description of the project<\/h2><\/div>The project includes the construction of a circular underground storage tank<\/a>, comprising a diaphragm wall of 50m diameter and 35m deep.<\/p>\nThe diaphragm wall is anchored in the clay at a depth of 43m. It used 26 panels.<\/p>\n<\/div>
Our solution<\/h2><\/div>The diaphragm wall was excavated using a Hydrofraise\u00ae Evolution 5<\/strong> to dig through the gaize (sandstone 8m thick and 30m deep), while maintaining a verticality of 0.3%.<\/p>\nThe nature of the site also made the use of the Hydrofraise\u00ae necessary, as the diaphragm wall<\/a> was constructed in the middle of a roundabout in the centre of Le Havre. This meant truck comings and goings had to be kept toa minimum, which was made possible by pumping the spoil directly from the digging tool to the treatment plant.<\/p>\nThe size of the site also meant the bentonite plant had to be moved 70m, on the other side of the roundabout, with the piping routed via a pipe-rack.<\/p>\n
With this organisation, the diaphragm wall was completed on schedule in 12 weeks<\/strong>. Four test micropiles<\/a><\/strong> were installed with a depth of 65m to test the characteristics of the strata at depth.<\/p>\nWhen tank excavation was completed and the diaphragm wall built, 520 micropiles were installed to anchor the raft in the sand<\/strong>. The micropiles were designed by the Soletanche Bachy design office to transfer compression stress (when the tank is full) and traction stress (uplift from the groundwater under the raft). The micropiles used Gewi\u00ae bars of diameter 63 or 75mm. The grid is about 2m by 2m.<\/p>\n<\/div>![](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2023\/06\/Bassin-Jenner-IMG_5313-1.jpg\")
<\/span><\/li>![\"Bassin](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2023\/06\/Bassin-Jenner-image001-1.jpg\")
<\/span><\/li>![\"Ferraillage](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2023\/06\/Bassin-Jenner-Ferraillage-radier.jpg\")
<\/span><\/li><\/ul><\/div><\/div><\/div><\/div>Type of project:<\/h3><\/div>![\"Water](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2023\/03\/Eau-et-assainissement.png\")
<\/a><\/span>Water and sewage<\/h4><\/div><\/div><\/div>Location:<\/h3><\/div>France<\/p>\n<\/div>
Subsidiary of Soletanche Bachy:<\/h3><\/div>Soletanche Bachy France<\/a><\/p>\n<\/div>Project owner:<\/h3><\/div>Communaut\u00e9 de l\u2019agglom\u00e9ration Havraise<\/a><\/p>\n<\/div>Prime contractor:<\/h3><\/div>SOGREAH<\/a><\/p>\n<\/div>Consortium:<\/h3><\/div>SOLETANCHE BACHY – QUILLE – DTP TERRASSEMENT – CSM BESSAC – FELJAS ET MASSON<\/p>\n<\/div>
Works period:<\/h3><\/div>09\/2008 – 07\/2009<\/p>\n<\/div>
Types of techniques:<\/h3><\/div>![\"Diaphragm](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2023\/03\/Diaphragm-wall-copie.png\")
<\/a><\/span>Diaphragm wall<\/h4><\/div><\/div><\/div>![\"Micropiles\"](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2023\/03\/Micropile.png\")
<\/a><\/span>Micropiles<\/h4><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\n\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>Chiffres-cl\u00e9s du projet<\/p><\/h2><\/div>
<\/div><\/div><\/div>0<\/span><\/div>micropiles (25m depth)<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>0<\/span><\/div>diaphragm wall panels (43m depth)<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>0<\/span> weeks<\/span><\/div>for the completion of diaphragm wall works<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>Related techniques<\/h2><\/div><\/div><\/div><\/i>See all the techniques<\/span><\/a><\/div><\/div><\/div>- <\/span><\/a><\/span>
Micropile<\/a><\/h3><\/div><\/div><\/div><\/div><\/div> An agile technique that adapts to the complexity of the project and its environment. Foundations, [...]<\/p><\/div>
<\/i>Find out more<\/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\/1644584766984-mobile.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>Find out more<\/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>
Deep foundations<\/a><\/h3><\/div><\/div><\/div><\/div><\/div>
The tank was built in the middle of the roundabout at the exit of the Jenner tunnel and is the final part of the anti-flooding programme started by CODAH in 2006, with the Demidoff and Levesque tanks (also built by Soletanche Bachy).<\/p>\n<\/div>
Description of the project<\/h2><\/div>The project includes the construction of a circular underground storage tank<\/a>, comprising a diaphragm wall of 50m diameter and 35m deep.<\/p>\nThe diaphragm wall is anchored in the clay at a depth of 43m. It used 26 panels.<\/p>\n<\/div>
Our solution<\/h2><\/div>The diaphragm wall was excavated using a Hydrofraise\u00ae Evolution 5<\/strong> to dig through the gaize (sandstone 8m thick and 30m deep), while maintaining a verticality of 0.3%.<\/p>\nThe nature of the site also made the use of the Hydrofraise\u00ae necessary, as the diaphragm wall<\/a> was constructed in the middle of a roundabout in the centre of Le Havre. This meant truck comings and goings had to be kept toa minimum, which was made possible by pumping the spoil directly from the digging tool to the treatment plant.<\/p>\nThe size of the site also meant the bentonite plant had to be moved 70m, on the other side of the roundabout, with the piping routed via a pipe-rack.<\/p>\n
With this organisation, the diaphragm wall was completed on schedule in 12 weeks<\/strong>. Four test micropiles<\/a><\/strong> were installed with a depth of 65m to test the characteristics of the strata at depth.<\/p>\nWhen tank excavation was completed and the diaphragm wall built, 520 micropiles were installed to anchor the raft in the sand<\/strong>. The micropiles were designed by the Soletanche Bachy design office to transfer compression stress (when the tank is full) and traction stress (uplift from the groundwater under the raft). The micropiles used Gewi\u00ae bars of diameter 63 or 75mm. The grid is about 2m by 2m.<\/p>\n<\/div>- <\/span><\/li>
- <\/span><\/li>
- <\/span><\/li><\/ul><\/div><\/div><\/div><\/div>
Type of project:<\/h3><\/div><\/a><\/span>Water and sewage<\/h4><\/div><\/div><\/div>Location:<\/h3><\/div>France<\/p>\n<\/div>
Subsidiary of Soletanche Bachy:<\/h3><\/div>Soletanche Bachy France<\/a><\/p>\n<\/div>Project owner:<\/h3><\/div>Communaut\u00e9 de l\u2019agglom\u00e9ration Havraise<\/a><\/p>\n<\/div>Prime contractor:<\/h3><\/div>SOGREAH<\/a><\/p>\n<\/div>Consortium:<\/h3><\/div>SOLETANCHE BACHY – QUILLE – DTP TERRASSEMENT – CSM BESSAC – FELJAS ET MASSON<\/p>\n<\/div>
Works period:<\/h3><\/div>09\/2008 – 07\/2009<\/p>\n<\/div>
Types of techniques:<\/h3><\/div><\/a><\/span>Diaphragm wall<\/h4><\/div><\/div><\/div><\/a><\/span>Micropiles<\/h4><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\n\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>Chiffres-cl\u00e9s du projet<\/p><\/h2><\/div>
<\/div><\/div><\/div>0<\/span><\/div>micropiles (25m depth)<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>0<\/span><\/div>diaphragm wall panels (43m depth)<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>0<\/span> weeks<\/span><\/div>for the completion of diaphragm wall works<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>Related techniques<\/h2><\/div><\/div><\/div><\/i>See all the techniques<\/span><\/a><\/div><\/div><\/div>- <\/span><\/a><\/span>
Micropile<\/a><\/h3><\/div><\/div><\/div><\/div><\/div> An agile technique that adapts to the complexity of the project and its environment. Foundations, [...]<\/p><\/div>
<\/i>Find out more<\/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>Find out more<\/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>
Deep foundations<\/a><\/h3><\/div><\/div><\/div><\/div><\/div>
The project includes the construction of a circular underground storage tank<\/a>, comprising a diaphragm wall of 50m diameter and 35m deep.<\/p>\n The diaphragm wall is anchored in the clay at a depth of 43m. It used 26 panels.<\/p>\n<\/div> The diaphragm wall was excavated using a Hydrofraise\u00ae Evolution 5<\/strong> to dig through the gaize (sandstone 8m thick and 30m deep), while maintaining a verticality of 0.3%.<\/p>\n The nature of the site also made the use of the Hydrofraise\u00ae necessary, as the diaphragm wall<\/a> was constructed in the middle of a roundabout in the centre of Le Havre. This meant truck comings and goings had to be kept toa minimum, which was made possible by pumping the spoil directly from the digging tool to the treatment plant.<\/p>\n The size of the site also meant the bentonite plant had to be moved 70m, on the other side of the roundabout, with the piping routed via a pipe-rack.<\/p>\n With this organisation, the diaphragm wall was completed on schedule in 12 weeks<\/strong>. Four test micropiles<\/a><\/strong> were installed with a depth of 65m to test the characteristics of the strata at depth.<\/p>\n When tank excavation was completed and the diaphragm wall built, 520 micropiles were installed to anchor the raft in the sand<\/strong>. The micropiles were designed by the Soletanche Bachy design office to transfer compression stress (when the tank is full) and traction stress (uplift from the groundwater under the raft). The micropiles used Gewi\u00ae bars of diameter 63 or 75mm. The grid is about 2m by 2m.<\/p>\n<\/div> France<\/p>\n<\/div> Soletanche Bachy France<\/a><\/p>\n<\/div> Communaut\u00e9 de l\u2019agglom\u00e9ration Havraise<\/a><\/p>\n<\/div> SOGREAH<\/a><\/p>\n<\/div> SOLETANCHE BACHY – QUILLE – DTP TERRASSEMENT – CSM BESSAC – FELJAS ET MASSON<\/p>\n<\/div> 09\/2008 – 07\/2009<\/p>\n<\/div> Chiffres-cl\u00e9s du projet<\/p><\/h2><\/div> An agile technique that adapts to the complexity of the project and its environment. Foundations, [...]<\/p><\/div> A Soletanche Bachy expertise A diaphragm wall is a support of excavation technique used by [...]<\/p><\/div>Our solution<\/h2><\/div>
<\/span><\/li><\/span><\/li><\/span><\/li><\/ul><\/div>Type of project:<\/h3><\/div>
<\/a><\/span>Water and sewage<\/h4><\/div><\/div><\/div>
Location:<\/h3><\/div>
Subsidiary of Soletanche Bachy:<\/h3><\/div>
Project owner:<\/h3><\/div>
Prime contractor:<\/h3><\/div>
Consortium:<\/h3><\/div>
Works period:<\/h3><\/div>
Types of techniques:<\/h3><\/div>
<\/a><\/span>Diaphragm wall<\/h4><\/div><\/div><\/div>
<\/a><\/span>Micropiles<\/h4><\/div><\/div><\/div>
Related techniques<\/h2><\/div><\/div><\/div>
Micropile<\/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>\nDeep foundations<\/a><\/h3><\/div>
![\"\"](\"https:\/\/www.soletanche-bachy.com\/wp-content\/uploads\/sites\/18\/2022\/05\/sbfs-chantier-havre-vignette.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