Abstract
During the past twenty-five years, biaxial geo-grids have been used as reinforcement in the construction of railroad beds and ballasts to improve their performance and structural integrity. In the present study geosynthetic reinforced railway track were modeled using the software PLAXIS 8.2 with high geogrid stiffness at various placement depths and compared with unreinforced section. The result shows that reinforced railway track can be used to improve the performance of track with reduction in the stress and deformation of subgrade. Keywords: Ballasted Track, Geogrids, Reinforcement
Highlights
The economic development and growth of industries needs a better transportation of goods and passenger services
Most of the routes constructed in Indian Railways provided the lower axle load traffic (20 to 22.5tons) earlier and this have been subjected to an increased axle load upto 32.5 tons at present
The use of geosynthetics in rail tracks has been studied in the past and it is proved that the geosynthetics can improve the track performance by reducing subgrade stress, deformation and degradation
Summary
The economic development and growth of industries needs a better transportation of goods and passenger services. Most of the routes constructed in Indian Railways provided the lower axle load traffic (20 to 22.5tons) earlier and this have been subjected to an increased axle load upto 32.5 tons at present. Due to the use of high speed and heavy axle load in the existing track, subgrade failure takes place and it causes high maintenance cost. The formation of track super structure is found to be increased as per the Guidelines and Specifications in the Design of Formation for Heavy Axle Load (2009). Improvement in top layer of railway subgrade by providing suitably designed sub-ballast layer is essential to withstand the higher stresses, laying of thick sub-ballast layer is highly expensive. The use of geosynthetics in rail tracks has been studied in the past and it is proved that the geosynthetics can improve the track performance by reducing subgrade stress, deformation and degradation. Geogrids reinforced railway track were modeled using PLAXIS 8.2 with different geogrid stiffness at various placement depths and compared with unreinforced section
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