Paris Region “Suite Rapide”

A real mobile factory

WHAT IS SUITE RAPIDE?

The purpose of a Suite Rapide (rapid action unit) is to recondition all the elements of a rail track within a very short time. The main objective is to disturb commercial train traffic as little as possible. A race against time that can happen both day and night! There are currently 3 Suite Rapide units operational throughout France.

 

WHY IS THERE A SUITE RAPIDE UNIT IN THE PARIS REGION?

Apart from the network development and modernisation projects, the ageing infrastructure that is much used every day, need to be regenerated. In order to achieve a better industrial regeneration of the Paris region network, the implementation of a Suite Rapide was considered necessary.

 

THE 4 PHASES OF A SUITE RAPIDE WORK SITE

1. Stripping

The machine lifts up the railway and the former ballast is extracted. The recoverable part is put back on the railways, whereas the non recyclable ballast is loaded on wagons, at the front of the machine.

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2. substitution

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The rail clamps are removed, to allow the old rails to be removed from the track. The old wooden sleepers are removed and replaced by concrete sleepers. The new long rails are progressively installed, clamped onto the sleepers and welded together.

3. CONSOLIDATION AND LEVELLING

Du ballast est déversé pour stabiliser la voie et la positionner à la bonne hauteur. Cette remise à niveau de la voie permet des ajustements précis de 80 mm maximum.

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4.release and final Levelling

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The rail is brought to a temperature between 20 and 32°C. This prepares the rail for the expansion and contraction loads to which it is permanently subjected, due to temperature variations. The track is finally adjusted: levelling and additional ballast.