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Performance of geosynthetic-reinforced alternative sub-ballast material in a railway track

2008; Volume: 15; Issue: 5 Linguagem: Inglês

10.1680/gein.2008.15.5.311

1751-7613

G. A. Fernandes, Ennio M. Palmeira, Romero César Gomes,

Geotechnical Engineering and Underground Structures

Geosynthetics have been used as reinforcement in various applications in geotechnical engineering. This paper presents a study on the use of geosynthetic reinforcement to reduce the consumption of good-quality sub-ballast material in a railway track in the state of Minas Gerais, Brazil. Six test sections on the railway were instrumented and monitored for a period of 2 years. Nonwoven geotextile and a geogrid were used as reinforcement in different positions in the sub-ballast. The results obtained showed that the presence of geosynthetic reinforcement reduced the strains mobilised in the sub-ballast, reduced the breakage of ballast element, and allowed the use of a cheaper alternative material in the sub-ballast construction. The results showed the potential of the use of alternative sub-ballast material reinforced with geosynthetic to reduce the costs of construction and maintenance of railway tracks.