1. MECHANISED BALLAST CLEANING DYNAMIC TRACK STABILISATION & UNIMAT

2. FUNCTIONS OF BALLAST Transfer of wheel forces uniformly
To provide elastic and resilient medium
Resistance to vertical movement
(settlement/deflections)
Media for track geometry correction
Lateral resistance
Longitudinal resistance
Efficient drainage

3. REASONS FOR FOULING BALLAST BREAK DOWN FINES FROM SUBGRADE
Handling
Tamping/packing
Traffic- impact & abrasion
Weathering
FINES FROM SUBGRADE
Mud pumping
Seepage
FINES FROM SURFACE
Droppings from trains
Wind/water transported

4. EFFECTS OF FOULING REDUCION IN FRICTION
More dynamic stresses
REDUCTION IN ELASTICITY/RESILENCY
IMPEDES DRAINAGE- MUD PUMPING
Load carrying capacity is severely restricted
GEOMETRY CORRECTION BECOMES DIFFICULT
MORE FREQUENT ATTENTIONS TO TRACK
UNDUE STRAIN ON TRACK COMPONENTS/ROLLING STOCK

7. BALLAST CLEANIG MACHINE

8. BALLAST CLEANING MACHINE (Pt. & Xing)

9. CUTTER CHAIN
                                                                        

10. SCRAPER & FINGER CHISELS
                                                                                  

11. CUTTING CHAIN ASSEMBLY

12. BALLAST CLEANING
                                                                                  

13. CROSS SLOPE ADJUSTMENT

14. SCREENS
                                      

15. SCHEMATIC OF SCREENING

16. SCREENING OF BALLAST
                                                                        

17. DISTRIBUTION OF CLEAN BALLAST
                                                                        

18. DISTRIBUTION OF CLEAN BALLAST

19. DISPOSAL OF MUCK
                                                               

20. BALLAST CLEANING OF Pt. & Xing
                                                                                  

21. MEASUREMENT OF CUTTING DEPTH

22. SHOULDER BALLAST CLEANER

23. SHOULDER BALLAST CLEANER

24. DYNAMIC TRACK STABILISATION

25. DYNAMIC TRACK STABILISER

26. AIMS
The aim of dynamic track stabilisation is to achieve an improved anchoring of the track skeleton in the ballast bed.
To permits maximum permissible/ enhanced speed after maintenance .
It also aims at retention of track geometry for a longer period.
Savings in operation & maintenance cost

27. PRINCIPLE OF DYNAMIC TRACK STABILISATION
The dynamic track stabilizer sets the track in horizontal oscillations whilst applying a static vertical load at the same time. This causes the ballast stones to re-arrange their position, with the result that the track is lowered and gets “fixed" into the ballast bed.

28. PRINCIPLE OF DYNAMIC TRACK STABILISATION

29. DGS 62 N Two stabilising units, located between the bogies
Four flanged rollers and two pressing rollers, acting as a clamp, on each unit
Synchronous-action flywheel gear to produce the horizontal oscillation directed crosswise to the track axis

30. DGS 62 N Hz
Hydraulic cylinders for applying the vertical load (up to 356 kN)
Proportional levelling system for an automatic, measured lowering
In one of the two cabins the operating and monitoring controls for working operation are clearly laid out

31. STABILISING UNIT
                                                                        

32. APPLICATION OF VERTICAL LOAD
                                                                        

38. ADVANTAGES OF DYNAMIC TRACK STABILISATION
Homogeneous, spatial consolidation of the entire ballast bed
Increase of the resistance to lateral displacement
Careful treatment of the ballast material by dynamic re-arrangement of the ballast stones to avoid fines
The danger of track buckling is reduced

39. ADVANTAGES OF DYNAMIC TRACK STABILISATION
Durability of the accurate track geometry over a longer period, raising the quality reserve of the track
The intervals between maintenance are extended
Great savings in the regular track maintenance and operational hindrance costs when the technique is applied regularly
Dynamic stabilisation raises the safety and helps to lower costs

40. TAMPING OF TURNOUT BY
UNIMAT

41. 3rd rail lifting
UNIMAT-3S 42 Nos.

42. Points and crossing tamping machine Tilting / swirling tools
UNIMAT-3S 42 Nos.
Points and crossing tamping machine
Tilting / swirling tools
3rd rail lifting arrangement in (3s) machines
Manual lifting of 3rd rail in 2s machines
1 t/out per 90 minutes

43. PACKING OF CROSSOVER SIDE
If manual packing under sleeper on turnout side is not done while packing main line side cross level may get disturbed when machine arrives on turn out side for packing.

44. UNIMAT – 4S

45. UNIMAT-4S
Switch maintenance with three-rail lifting and four-rail tamping
Four independent-action tamping units with a total of 16 individually tiltable tamping tines
For tamping the fourth rail the outer tamping units are slewed out on telescopic jibs

46. UNIMAT-4S
The tamping units are pivot-mounted on the machine frame to ensure optimum tamping of sleepers in slanting position
Combined lifting and lining unit with lifting hooks and roller clamps
Synchronous three-rail lifting unit with automatically adjusting telescopic arm (optional)

47. UNIMAT-4S
Ballast hopper with distributing device for intake and placement of the surplus ballast (optional)
Cabin at the front with driver’s desk and ALC automatic guiding computer
Work cabin with excellent view onto the work area

48. THANK YOU