Method and apparatus for rehabilitating the subgrade...

Details Method and apparatus for rehabilitating the subgrade... Method and apparatus for rehabilitating the subgrade...

E - Fixed Constructions

01

B

E01B 27/06 (2006.01) E01B 27/10 (2006.01)

Patent

CA 2162805

The subgrade supporting a ballast bed for a track is rehabilitated by (a) lifting the track off the ballast bed, removing an upper portion of the ballast from the ballast bed, comminuting the removed ballast to obtain gravel, storing the gravel, and laying the track on a remaining portion of the ballast bed, in a first stage, (b) lifting the track off the remaining ballast bed portion, removing the ballast of the remaining ballast bed portion until the subgrade is exposed, and laying the track on the exposed subgrade, in a second stage, and (c) lifting the track off the subgrade, discharging the stored gravel on the subgrade, planing and compacting the gravel on the subgrade until a protective layer for the subgrade is obtained, and laying the track on the protective subgrade layer, in a third stage.

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