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Services>Trackbed Investigation Services

Trackbed Investigation Services

The key benefits of a RASC® survey are:

  • To provide evidence of actual trackbed conditions to help plan condition-based maintenance
  • To allow for cost-effective trackbed defect root cause assessment
  • To map changes in trackbed condition over time to prioritise maintenance
  • To quality control maintenance work carried out to benchmark performance
  • To confirm as-built trackbed structures
  • To map trackside assets and drainage

Integrated trackbed inspection methods, collected synchronously, can improve customized maintenance decision outcomes as evidenced by the following examples:

  • Rationalising the ballast resource required to maintain track by defining the extent of centre-bound and shoulder fouled track using GPR-derived fouling metrics combined with MTLS-derived ballast volume measurements.
  • Carrying out effective spot maintenance removing the risk of return visits, by revealing the full extent of subgrade failure associated with active surface mud spots.
  • Designing remedial drainage by integrating GPR-derived ballast fouling and moisture likelihood with MTLS-derived surface drainage assessment, with confirmatory inspection trenches.
  • Identifying sleepers (ties) at greatest risk of degradation by combining GPR-derived fouling metrics with trackbed surface images of sleeper condition.
  • Identifying the cause of a derailment by combining GPR-derived ballast pocket features, ballast condition, trackbed surface images and track geometry.
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