Method for converting a ballasted track into a slab track

A method for converting a ballasted track that comprises a ballast bed resting on a solid underground, crossties lying on the ballast bed, and rails fastened on the crossties by rail fixtures, into a slab track, wherein the method comprises the following steps:

• removing the ballast bed in a section of the track that extends over a plurality of the crossties,
• releasing said rail fixtures,
• removing a first number of said crossties after releasing the rail fixtures,
• inserting crosstie blocks in said section of the track in vertical positions,
• fastening the crosstie blocks to the rails,
• inserting temporary and vertically adjustable supports in said section of the track such that said adjustable supports are supported on said solid underground,
• resting said rails on said adjustable supports,
• filling concrete in an area that extends over a number of said crosstie blocks in a direction of said rails, from said solid underground up to at least part of a height of said crosstie blocks,
• removing a least a part of each of said adjustable supports located between said crosstie blocks in a direction of the rails;
• and
• wherein, said conversion is carried out without changing positions of the rails, and the track is immediately operable after placement of the supports without a need for closing the track until all method steps are completed.