Sncf infrastructure branch : 3 domains

1 | SNCF INFRASTRUCTURE BRANCH

SNCF INFRASTRUCTURE BRANCH : 3 DOMAINS

SNCF INFRA MANAGEMENT

2 | THE FRENCH RAILWAY SYSTEM

FRENCH RAILWAY SYSTEM AT A GLANCE

SOME OF THE ACTORS OF THE SYSTEM

3 | THE FRENCH RAILWAY NETWORK

The French Network

• Total track length

• UIC 1 à 4 : 19885 km ( included 3839 km HSL )
• 9969 S & C ( included 754 HSL )
• UIC 5 et 6 13803 km - 7621 S & C

• Regional lines

• with passengers : 11723 km - 4113 S & C
• without passengers: 4417 km - 2171 S & C

• Side tracks 14949 km - 46177 S & C

Study of EPFL 2005

• The study made by EPFL in 2005 showed

• Bad conditions of the network
• No optimization of M/R: The share M/R was 2/3;1/3 when it was from 1/2;1/2 up to 1/3;2/3 in other europeen countries
• No optimization of track possession : According to the EPFL, track possession duration was too short (1h50) and no technically and economically efficient
• No optimization of traffic control : There were too much signalling boxes

What has be done so far

What has be done

What is going on

• RFF has defined his strategic vision of the network

• Definition of freight corridors with high level of availability
• More accurate definition of the performance of the network according to the different routes, eg:
• Axel load
• Speed
• Gauge
• Availability
• Increasing of the slots for TOCs and FOCs
• Decreasing of maintenance and renewal costs
• So SNCF has to improve the maintenance policies, in order to have more trains, more availability, as all Infra Managers do.

Maintenance policies

• These huge requirements lead to

• An optimization of maintenance and renewal, that means an assessment of the policies on each route based on LCC
• More efficiency of the renewal
• Longer zones
• Uniformization
• Planning
• The necessity of planning and reducing maintenance costs; the best way is to move from an « on condition » based maintenance to a predictive maintenance

Predictive maintenance

• To do that,it is necessary:

• To have a good knowledge of the conditions of the network
• To know the parameters which have an impact on the behaviour of the components of the infrastructure
• To know the degradation’s laws of these components according to the sollicitations they have to support
• In order to plan the interventions

Predictive maintenance

• The knowledge of the degradation’s laws,eg:

• Track circuits components

Tools

• Development and implementation of measurement cars

• IRIS 320 already in operation
• Purchase of new measurement cars for conventional lines

• Development and implementation of tools in order to modelize the degradation’s laws and so to define « what to do » and « when to do » eg:

• Contact wire wear measurement and planning of replacement (with « Catalyse »)
• Track geometry quality measurement and planning of tamping (with « TIMON »)

Contact wire wear measurement

Contact wire wear analyse CATALYSE

CATALYSE

TIMON HSL 1

TIMON Conventional Line Paris-Le Havre

Remote control

• Development and implementation of remote control for level crossings Signalling and S & C in 3 Supervision Centers (Paris, Lyon,Pagny/Moselle)

Maintenance methods

• Implementation of new methods of maintenance for a higher durability of the interventions eg:

• Tamping in BAS
• Grinding
• Tamping and grinding

Optimization Maintenance/Renewal

Models of maintenance costs

Models of maintenance costs