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Maintenance of the LGV SEA from construction

LGV SEA Tours-Bordeaux is the first high-speed line built in France on the private public partnership model (PPP). Once the high speed line is open in 2017, LISEA, (Name of the PPP) will entrust its operation and maintenance to MESEA. Right from its design, the maintenance of that LGV has been at the heart of all discussions.

A well-defined organization.

   On this project, the sharing of risk is clear: MESEA assumes all risks related to maintenance. Those are materialized among others by dissuasive penalties for non-achievement of the LGV performance (Revenue train delays, Track discomfort) caused by the maintainer.

How to acquire specific expertise?

MESEA as the first private maintainer of LGV has adopted a conceptual model from the military world called Integrated Logistics Support or SLI and adapted to LGV context. Logistic support aims to ensure operational maintenance of the LGV line in parallel to its operation. It implements a set of processes and means of named 'elements' of the Integrated Logistic Support.

    Controlling the costs by optimizing resources: SLI approach applied to the SEA

MESEA has entrusted SOCOFER for the design and manufacture of maintenance equipment: Road/rail trucks named 'Modul'RR'®

MESEA has decided to abandon the traditional rail bound track car for maintenance work or catenary repair for modular Road/rail trucks. These trucks carry four different modules: crane module for track work, man-baskets lifting module, workshop module and unwinding contact line module. When not in use, these modules are stored on supports in maintenance bases.

modul_nac_catenaire_640_480  The advantage of this type of Road/rail vehicles, in addition to a cost / capacity ratio very competitive with rail bound track cars, is being able to de-rail/on-rail  very near to the job site area.
  This allow to travel via the road as close as possible to the job site while releasing the LGV tracks for maintenance trains with high added value mandatory  100% rail bound train  because of their mass such as tampers, grinding trains, trains ballast works, etc.
  In the end, the coexistence of vehicles on the rail is facilitated and programming is made easier and more efficient avoiding rail congestion.

  The other highlight is the versatility of the truck that fits the type of work planned. And in case of " major blow", it creates a stronger task force dedicated to  a job.
  Thus in case of need to replace a long track turnout (1/2 piece up to 60 m long), MESEA can simultaneously mobilize three crane trucks for handling these      parts.
  In case of a major catenary incident, MESEA can effectively mobilize all its trucks or for example two or three bucket trucks, one or two unwinding truck and a  truck workshop.

Project's Benefit with SLI approach on this modular trucks:


  • Design, both in civil engineering and track work, with optimized implementation of re-railing platforms dedicated to modul'RR trucks every 10 km, including   access roads from the public network and rail safety equipment.

  • Dedicated zones of protection adapted to work with modul'RR trucks;

  • Specific lifting nacelles for catenary work suitable reaching the two-wire installed at the top of the catenary poles;

  • Maintenance workshops tailor made to be used with modul'RR trucks;

  • Specific design of elevated track for storage of flatcars which can loaded with large pieces of track equipment with modul'RR trucks in road mode.

A total of five trucks and 11 modul'RR MESEA modules will be operational in spring 2017.

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