Sub-Ballast Stabilization

When tracks are built over soft subgrades, additional structural fill is required to bridge over the weak subgrade; service life of the design section is decreased; or a combination of the two can occur. The result of these sub-ballast challenges is additional construction costs, along with increases in operational costs and lost productivity.

The Spectra® Rail System can be used to help rail operators increase the service life of the sub-ballast layer. 

Among its many benefits, the Spectra Rail System can help rail operators:

  • Increase the service life of the sub-ballast layer
  • Reduce required layer thickness, minimizing structural fill quantities
  • Increase the speed of construction
  • Minimize the effects of variable/weak subgrades
  • Distribute loads more efficiently onto the underlying subgrade

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