Role of Geosynthetics in the railway sector

Release time：2025-11-01    Click：70

　　Whether it is new track construction or rehabilitation, there is enormous use of geosynthetics like geogrids, geocomposites, geocells, and geotextiles in the railway sector.

　　Geotextiles (resistant to puncture and tear) help with separating track layers supporting structures of different sizes and properties and also preventing the penetration of granular particles onto the subgrade. This helps maintain the integrity of granular layers and increases track life.

　　Ballast Stabilization: For reinforcement, geosynthetics like geotextiles, geogrids, and geocells, when installed over unstable or soft subgrades, improve efficiency by increasing load bearing capacity and better stress distribution. This is nothing but strengthening the railway ballast.

　　Ballast pockets are a common issue that leads to track geometry degradation. These are depressions beneath the ballast layer formed when ballast particles penetrate the subgrade forming pockets collecting moisture. The presence of ballast pockets warrants more track maintenance and results in a lower operational capacity.

　　Improved and stabilized subgrade material, installation of proper ballast drains to drain off the excess water, and stabilizing the upper ballast are all remedial measures for ballast pockets.

　　Geotextiles, with their permeability and retention properties, also act as a filter layer allowing free movement of water without disturbing or dislodging the subgrade.

　　Proper drainage is highly critical to prevent track deterioration. Towards that end, geosynthetics like drainage geocomposite that are resistant to mechanical damage are useful when installed at relevant points. They provide cross-track drainage, preventing the accumulation of water.

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