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Railways

THE CHALLENGE

Railways are designed to carry heavy traffic loads over the train tracks. Railroads are supported over sleepers (cross-ties) that in turn rest on compacted ballast layer. Finer compacted aggregate and sandy soils rest beneath the ballast layer. If the ballast layer and the underlying soil layer are not separated with a heavy weight nonwoven geotextile fabric, the heavy traffic loads will eventually cause the breakdown of the compacted ballast layer and intermixing with the underlying soil/finer aggregates. The layers have to stay separated while at the same time, water should be allowed to pass through. Due to the sharp nature of the ballast surface texture, geotextiles used in railroad applications should possess excellent resistance to puncture; dynamic perforation resistance as well has moderate tensile elongation properties. Since the geotextile will also serve the function of filtration, it should possess a considerably small characteristic opening size to allow water to pass through without allowing the intermixing and passage of soils to the surface. In certain areas when railroad tracks are to be built, due to the weak nature of the underlying soil, the base foundation layer thickness can be reduced by using a layer or more of extruded geogrids with large apertures. The bearing pressure of the underlying foundation is increased through the interlocking action between the ballast and the geogrid layers.

THE SOLUTION

Thrace Group SNW/NW/PNW Nonwoven Geotextiles offer effective solutions by providing filtration and separation functions. The Biaxial Extruded TG geogrids offer effective solutions by providing reinforcement functions that significantly reduce foundation design thicknesses without affecting performance. The reduction in foundation thickness translates to material and labor cost savings. They are durable products that will withstand the stresses encountered during installation operations and have a proven extended lifetime performance.

THE BENEFITS

  • Improved and extended lifetime performance, securing construction works
  • Considerable cost savings
  • Reduced CO2 emissions for environmentally friendly projects
     

Geogrids & Geocomposites

Product Name Tensile Strength MD Tensile Strength CD
TG1 13 kN/m 20 kN/m
TG2 20 kN/m 30 kN/m
TG1515 15 kN/m 15 kN/m
TG2020S 20 kN/m 20 kN/m
TG2020L 20 kN/m 20 kN/m
TG2525 25 kN/m 25 kN/m
TG3030S 30 kN/m 30 kN/m
TG3030L 30 kN/m 30 kN/m
TG4040S 40 kN/m 40 kN/m
TG4040L 40 kN/m 40 kN/m
TG3333L 33 kN/m 33 kN/m

Nonwoven Geotextiles

Product Name Tensile Strength MD Tensile Strength CD Resistance to Static Puncture Water Flow Rate
S6NW 6 kN/m 6 kN/m 1050 N 144 l/m2/sec
S8NW 8 kN/m 8 kN/m 1500 N 130 l/m2/sec
S10NW 10 kN/m 10 kN/m 1700 N 110 l/m2/sec
S12NW 12 kN/m 12 kN/m 2000 N 110 l/m2/sec
S14NW 14 kN/m 14 kN/m 2300 N 90 l/m2/sec
S16NW 16 kN/m 16 kN/m 2600 N 90 l/m2/sec
S18NW 18 kN/m 18 kN/m 2900 N 80 l/m2/sec
S20NW 20 kN/m 20 kN/m 3500 N 70 l/m2/sec
S22NW 22 kN/m 22 kN/m 3700 N 70 l/m2/sec
S25NW 25 kN/m 25 kN/m 4300 N 65 l/m2/sec
S30NW 30 kN/m 30 kN/m 4800 N 45 l/m2/sec
80NW 6 kN/m 6 kN/m 860 N 144 l/m2/sec
90NW 7 kN/m 7 kN/m 1180 N 137 l/m2/sec
100NW 6,7 kN/m 6,7 kN/m 900 N 100 l/m2/sec
110NW 9 kN/m 9 kN/m 1600 N 120 l/m2/sec
120NW 10 kN/m 10 kN/m 1700 N 110 l/m2/sec
140NW 11 kN/m 11 kN/m 1600 N 90 l/m2/sec
170NW 13 kN/m 13 kN/m 2500 N 110 l/m2/sec
190NW 15 kN/m 15 kN/m 2600 N 85 l/m2/sec
200NW 16,7 kN/m 16,7 kN/m 2350 N 60 l/m2/sec
270NW 22 kN/m 22 kN/m 2800 N 35 l/m2/sec
300NW 25 kN/m 25 kN/m 4300 N 65 l/m2/sec
350NW 24 kN/m 24 kN/m 4400 N 65 l/m2/sec
400NW 29 kN/m 29 kN/m 4100 N 25 l/m2/sec
500NW 37 kN/m 37 kN/m 6200 N 35 l/m2/sec
600NW 43 kN/m 43 kN/m 7400 N 35 l/m2/sec
P100NW 5 kN/m 5 kN/m 1500 N 180 l/m2/sec
P150NW 8 kN/m 8 kN/m 2000 N 110 l/m2/sec
P200NW 15 kN/m 15 kN/m 2900 N 80 l/m2/sec
P250NW 17 kN/m 17 kN/m 3350 N 70 l/m2/sec
P300NW 22 kN/m 22 kN/m 4000 N 65 l/m2/sec
P350NW 28 kN/m 28 kN/m 4500 N 45 l/m2/sec
P400NW 33 kN/m 33 kN/m 5000 N 40 l/m2/sec
P450NW 36 kN/m 36 kN/m 5500 N 40 l/m2/sec
P500NW 44 kN/m 44 kN/m 6200 N 35 l/m2/sec
P600NW 52 kN/m 52 kN/m 7400 N 30 l/m2/sec
P700NW 70 kN/m 70 kN/m 8500 N 30 l/m2/sec
P800NW 75 kN/m 75 kN/m 10000 N 25 l/m2/sec
P900NW 90 kN/m 90 kN/m 10500 N 25 l/m2/sec
P1000NW 95 kN/m 95 kN/m 11500 N 20 l/m2/sec
P1100NW 100 kN/m 100 kN/m 12000 N 20 l/m2/sec
P1200NW 105 kN/m 105 kN/m 14000 N 20 l/m2/sec
P2000NW 150 kN/m 150 kN/m 25000 N 7 l/m2/sec
S13NW 13 kN/m 13 kN/m 2100 N 100 l/m2/sec
P1500NW 120 kN/m 120 kN/m 20000 N 10 l/m2/sec