As part of the development of the MRE (Marine Renewable Energy) sector, the Bretagne Region has planned an ambitious project for a quay and polder dedicated to the manufacture and transport of offshore wind turbines in the port of Brest.
The contract for reinforcement by inclusions was won by the Balineau / VCMF consortium. It consisted of installing 24 to 28 m long HEB 240 type profiles by vibro-driving and ramming.
The inclusions, numbering 1146 U, were first lowered with a vibrator into the hydraulic fill and the sandy-vastile alluvium, then by ramming with a hydraulic hammer into the schistose bedrock, altered at the top. A ramming criterion, depending on the load to be taken up in the final phase, had been defined beforehand and verified by a series of tests.
The project was carried out under a strong constraint of time, the works being conditionning the completion of the main quay, and also by the exiguity of the site, in interface with other parts of the structure.