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Accueil>Sleeper replacement method
  Methode de remplacement des traverses
 

 

All the sleepers are not in the same condition. Frequently, a limited number have to be quickly changed.

In this case, the selective replacement is another way to maintain and/or upgrade the track infrastructure.

 

 

The Geismar method makes use of a range of machines suited for efficient and economical sleeper replacement; they meet the following requirements:

• Changing old timber or concrete sleepers without lifting the track.
• Ballast tamping under the new sleepers immediately after insertion to avoid any speed restriction.
• Replacement without infringing the clearance gauge the adjacent track, if any, as all the machines work on the same track.
• Off-tracking in a few minutes to resume train circulation quickly.
• Replacementof up 60 to 80 sleepers/hour.

 

The most advanced configuration of the sleeper replacement method includes the following equipment:


1. Hand-held machinery for removing fastenings from the old sleepers:
coachscrewing machines TS, TB, TPAS, TEM, BS, etc.;
spike pullers AC1, AS2 or AS3; AP3 clippers for extracting the elastic fastenings.
2. One KGT/V rail/road loader, fitted with an attachment for clearing the ballast from
the casings of the sleepers to be changed and for ensuring the necessary space
for inserting the new sleeper without lifting the track.
3. One MRT sleeper changing machine for extracting the old sleeper.
4. A second MRT sleeper changing machine for inserting of the new sleepers.
5. Hand-held machines (as in 1) or LFT (self propelled sleeper fixing machine)
for fastening rails on the new sleepers.
6. A second KGT/V rail/road loader with a ballast grab to fill the casings and reshape the shoulders.
7. One ballast tamper with 1 or 2 tamping heads.
8. Various tools for manual work (ballast forks, etc.)