Railways

Subgrade erosion leads to loss of line and level, and the mud pumping results in mud holes and extensive track deterioration, requiring extensive maintenance. Geocomposites are a long-term solution to prevent mud pumping phenomenon, preventing rainwater penetration to the underlying deposits, allowing a controlled upward movement of water. It reduces maintenance costs and offers ease of installation.

Use of robust geogrids and geocomposites under the ballast increases the lifespan of the ballast and reduces excessive degradation and deformation, significantly increasing sustainability and reducing maintenance/renewal costs.

Nonwoven Geotextiles separate the ballast and capping layers and also find use at the subgrade capping interface. It provides separation and filtration, enhances adequate drainage, and stabilizes the capping layer. Geogrids in the track substructure provide mechanical stabilization of the capping layer, especially in coastal areas with soft subgrade soil having a low bearing capacity.

Good drainage is critical to avoid track deterioration. Drainage geocomposites at relevant points provide the much required cross-track drainage. Also, the installation of prefabricated vertical drains increases leads to improved stabilization of soft subgrade soil.