Repair of railways is necessary to identify and replace failed elements of the track. Before the repair is carried out, the condition of the entire structure of the railway track is checked at the required site and the territory adjacent to it. Repair of the railway track may consist in replacing worn-out sleepers and adding rubble. With major repairs, the entire canvas changes. This work also includes the repair of the basis of the railway track. When it comes to railway tamping then there are the options open for them also.
Sometimes the repair of the railway track is necessary to raise the technical category of the site. After carrying out all the necessary work, the railway track increases its carrying capacity which leads to its bandwidth. What are the types of repair and track works?
Reinforced overhaul of the railway track is a complete replacement of the track grid. With this work, the pillow is removed from crushed stone to a depth of 40 cm. a new backfill of this material is carried out, laying of sleepers and rail.
During the overhaul of the railway track, the upper part of the track is replaced with or without rubble. At the same time, some elements of railway tracks may change to those already used in the work, but at the same time their quality should be at their best.
Reinforced Medium Repair
This type of repair of the railway bed is carried out where the pillow of rubble collapsed or the roadside of the subgrade has become less than the permissible size.
The average repair of the railway track is mainly carried out where it is necessary to improve the ballast. With this repair, the ballast is replaced.
Lifting repair of the railway track is necessary to restore equal elasticity and equal strength of the track. Such repair raises the canvas to 5 cm above the mark that was before the repair. All work on the repair of the railway track is carried out by skilled workers using track machine stations.
Lifting track repair is designed to restore the equal elasticity of the sleeper base by continuously lifting and straightening the track with knocking down sleepers, as well as replacing unusable sleepers and partially restoring the drainage properties of ballast.
When lifting repair of the track are performed:
- Continuous straightening of the track in plan and profile with a rise of 5-6 cm, knocking down sleepers and adding ballast,
- Local cleaning of contaminated rubble in sleeper boxes and behind the ends of sleepers in places of splashes that appear at a depth of at least 10 cm below the base of sleepers, and with other types of ballast, partial replacement of contaminated ballast with clean,
- Replacement of defective rails, unusable sleepers and fastening elements,
- Adjustment of butt gaps,
- Removal of shims and continuous fastening of terminal and embedded bolts when fastening the design bureau, finishing crutches, adjusting anti-theft,
- Drainage cleaning,
- Editing rail and welded joints,
- Grinding rails,
Other works to the extent provided for by these Specifications.
The main criterion for the appointment of work on the track overhaul during their planning is the number of deviations from the norms of maintaining the track for subsidence, skews, deviations in level and plan according to the readings of the measuring car, and additional the number of ends of sleepers with splashes, defective sleepers and fastenings.