Pipeline with Relining, Jacking and Special Profiles in one project

All construction works were allocated to a SOGEA/SADE consortium. The site is divided into 3 sections of which the 3rd and biggest section is approx. 2 km long costing around 16 million Euros. Assisted by his consulting engineers and the water operator Veolia Eau, the client based his decision on the solutions proposed by the consortium which would ensure an uninterrupted service of the sewer, optimal completion dates, innovative technical solutions and efficient HOBAS GRP piping material in response to a range of required installation techniques. Trench sheathings were utilized for open trench installation since the line had to be assembled in major narrow depths, restricted by the existing collector and close structures. Another part of the line was microtunneled and a third part was solved with a HOBAS NC-Line® System installed in a gallery. The construction works were assigned to different parties of the consortium according to the required installation technique. The Melun special division of SADE is installing the NC-Line® whereas SOGEA Travaux Hydrauliques and SADE Marseille teams mainly deal with the open trench section.