Classification of Track Renewal Works
Track renewals can be broadly classified as under.
Complete track renewal This
implies the renewal of all the components of a track over a particular
length. The necessary recoupment of the ballast and the provision of a full
ballast cushion is also done along with complete track renewal (CTR).
Through rail renewal Through
rail renewal or TRR involves the renewal of all the rails between one
point and the next.
Through sleeper renewals This
entails the renewal of the entire lot of sleepers from one point to
another. The necessary recoupment of the ballast and the provision of a full
ballast cushion is also done along with TSR (through sleeper renewal).
Casual renewal This implies the
replacement of some of the unserviceable rails or sleepers or both with
serviceable, released rails and sleepers of a similar type and age.
Primary renewals This
refers to renewals that are done using new permanent way materials.
Secondary renewals This
refers to renewals that are done using released, serviceable permanent
way material.
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