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Published byTyrone Carpenter Modified over 9 years ago
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MECHANISED BALLAST CLEANING DYNAMIC TRACK STABILISATION & UNIMAT
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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
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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
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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
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BALLAST CLEANIG MACHINE
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BALLAST CLEANING MACHINE (Pt. & Xing)
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CUTTER CHAIN
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SCRAPER & FINGER CHISELS
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CUTTING CHAIN ASSEMBLY
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BALLAST CLEANING
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CROSS SLOPE ADJUSTMENT
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SCREENS
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SCHEMATIC OF SCREENING
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SCREENING OF BALLAST
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DISTRIBUTION OF CLEAN BALLAST
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DISTRIBUTION OF CLEAN BALLAST
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DISPOSAL OF MUCK
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BALLAST CLEANING OF Pt. & Xing
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MEASUREMENT OF CUTTING DEPTH
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SHOULDER BALLAST CLEANER
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SHOULDER BALLAST CLEANER
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DYNAMIC TRACK STABILISATION
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DYNAMIC TRACK STABILISER
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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
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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.
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PRINCIPLE OF DYNAMIC TRACK STABILISATION
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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
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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
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STABILISING UNIT
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APPLICATION OF VERTICAL LOAD
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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
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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
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TAMPING OF TURNOUT BY UNIMAT
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3rd rail lifting UNIMAT-3S 42 Nos.
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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
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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.
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UNIMAT – 4S
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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
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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)
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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
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THANK YOU
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