Track Geotechnology And Substructure Management Work

You cannot manage what you do not measure. Traditional methods (track geometry cars and visual inspection) are insufficient for substructure. Modern relies on non-destructive testing (NDT) and geophysical methods.

If track geometry cars show a "sinusoidal dip" pattern every 20–40 feet, or if GPR shows a subgrade moisture lens covering 90% of the corridor, localized repairs are futile. At this stage, the track must be removed, the subgrade excavated to a competent layer, and a new formation built with engineered fill and geocomposite drainage layers. Track Geotechnology and Substructure Management