Rehabilitation of a railway line

Rehabilitation of a railway line

Vinkovci-Tovarnik, Croatia | Geo&Tex 2000 spa

After the end of Yugoslav Wars, the Countries of former Yugoslavia have begun to rehabilitate the infrastructure network, investing also in a new efficient railway system integrated in the Pan-European Corridors.

Of all the projects related to the modernization of the Balkan railway network, one of the most important has been the Vinkovci-Tovarnik line in Croatia, at the Serbian border, with a section of about 35 km to be reconstructed.

The project has indicated a large use of a nonwoven geotextile and of a geogrid in the construction of the track substructure. The primary role of geotextile has been to separate the soils out of which the railway embankment was constructed from the sub-layer, in order to keep the characteristics of both materials unchanged. The technical specifications for the geotextile have considered:

  • Type, mechanical characteristics and water permeability of the materials of the embankment
  • Size of granular materials of the new sub-layer
  • Compressibility module value at the level of bedding formation
  • Traffic load
  • Resistance of the geotextile to all kind of stresses during the installation phase and during all its service life

Properties required for the non woven geotextile:

  • Wide-width Tensile strength MD/CMD: ≥ 20/20 kN/m (EN ISO 10319)
  • Elongation at maximum load MD/CMD: ≥ 30/30%
  • Static puncture resistance: ≥ 3200 N (EN ISO 12236)
  • Permeability coefficient normal to the plane ≥ 1 x 10-3 m/s (EN ISO 11058)
  • Characteristic opening size: 6 micron ≤ O90 ≥ 200 micron (EN ISO 12956)
  • Resistance to UV radiation
  • Resistance to chemical and microbiological degradation

Total quantity of non woven geotextile installed was 300.000 sm , i.e. a length of 50 km and a width of 6 m; product from Geo&Tex 2000 spa was GEO PP 4 NG 280 g/m2, high tenacity staple fibre polypropylene non woven geotextile, UV stabilized.