Construction of a New Railway Track

This presentation is all about various methods employed for the construction of new railway track

1. CONSTRUCTION
OF A RAILWAY
TRACK
Prepared By:
Arbaz Kazi
Asst. Professor
VCET, Vasai (W)

2. Construction of a New Railway Line
Theconstructionofanewrailwaytrackcanbe
dividedintothreestages.
1.Earthwork.
2.Platelaying
3.Layingofballast

3. Theformationmaybeinanembankmentora
cuttingdependinguponthegeneraltopographyofthe
area.
Aformationinanembankment isnormally
preferredfromthepointofviewofgooddrainage.
Theheightofembankmentabovehighestwaterin
theareashouldbeatleast60cm.
Earth work

4. Earth work
Gauge Type of
formation
Width of
Single line
Formation
Double line
B.G Embankment 6.10m 10.82m
Cutting 5.40m 10.21m
M.G Embankment 4.88m 8.84m
Cutting 4.27m 8.23m

5. Plate laying
Theoperationoflayingoutoftherailsandsleepersoverthe
readyformationisknownasplatelaying.
Thepointfromwherethelayingoftrackstartsisknownas
thebaseandthepointuponwhichthenewtrackiscarried
outisknownastherailhead.
Methodsofplatelaying
1.Tramlinemethodorsidemethod
2.Telescopicmethod
3.Americanmethod

6. Tram line method or side method:
Thismethodisusedforplatelayinginflatcountry
Usedwhennewtrackislaidnexttotheexisting
track
Forplatelayingofnewtrack,eitherofthe
followingtwomethodsmaybeadopted
(i)Aserviceroadisconstructedparalleltothe
proposedtrackandthematerialsaretransported
tothesiteofthework

7. (ii)Atemporaryraillineparalleltotheproposed
trackandthematerialsaretransportedinwagons.
Thistemporarylineisknownastramline
Inthismethodallthematerialsaretakenfrom
thecentraldepotinmaterialtrainsonthe
existingtrackandarespreadontheformationof
newtrack
Aftercompletingspreading,theworkof
assemblingisstartedfromoneendmanually

8. Tram Line Method or Side Method

9. Telescopic method:
ThismethodisusedverywidelyinIndia
Thematerialaretransportedinmaterialtrainto
thefarthestpointofnewtrackandunloaded.
Thesematerialsarethentransportedtothepoint
whereworkisinprogressanddifferent
componentsoftrackareassembledhere.
Inall5operationsareinvolvedintelescopic
method.

10. 1.CollectionandPreparationofmaterialatdepot
2.Transportationofmaterialsfromdepottoworksite
3.Unloadingofmaterialattheworksiteandcarrying
themtorailhead
4.Fixingtherailtothesleepersandjoiningthetwo
railswithfishplateorbywelding
5.Packingoftrackforcorrectlevelandalignment
OPERATIONS INVOLVED

13. American method
Thismethodinvolvesallmechanicalwork
•Thismethodconsistsoffixingrailstothesleepers
andliftingthewholeunitbyheavycranes.
•Firstoneislinkedwiththerailhead,thenthe
trainmovesaheadbyoneraillengthandthesame
procedureisrepeated.
•Thismethodisun-economicaloneandisnotused
inIndia

15. Laying of ballast
Theballastisnormallyspreadontherailwaylinesafterthe
embankmenthassettledwellandatleasttwomonsoonshavepassed
overit.
Theworkofspreadingtheballastisdonebymeansofballasttrains,
whichhavespecialhoppersthroughwhichtheballastcanbe
automaticallyunloadedontothetrack.
Alternatively,ballastisloadedinwagonsofthetrainandthen
unloadedatthesiteintoanumberofheapsatsuitableintervalsalong
thetrack.
Thenpackingofballastisdonebytheworkersbymeansofshovels.

16. TRAIN USED FOR LAYING BALLAST

17. Methodofrelaying:
•Workofrelayingthetrackisnormallydividedintothe
followingstages:
•(i)Preliminarywork:
•Topreparescheduleofmaterialsper100mlengthor
perkmofthetrack.
•Theentirequantityiscollectedatthecentralstore,
fromwhichdaytodayrequirementsisdrawn

18. (ii)Layingofthetrack:
✓Removalofthefittings.
✓Removalofrailsandsleepers
✓Placingofnewsleepers
✓Layingofrails
✓Layingofsecondrail
✓Finishing
iii)Constructionofthetrack:
✓Tighteningofthefittings
✓Distributionofballast
✓Furtherpackingofballast
✓Returnofreleasedmaterialtostore

19. Maintenanceoftrack:
•Therailwaytrackrequiresproperwatchand
wardforsecurityreasons
Maintenanceofrailwaytrackconsistsof
•(i)Dailymaintenance(ii)PeriodicMaintenance
•Fordailymaintenancethetrackisdividedinto
sectionsof5to8kmslengths.
•Eachsectionislookafterbyagang

20. Thedailymaintenanceconsistsof
❖Generalinspectionofthetrack
❖Checkingupofallfasteningsandfittings
❖Tighteningofboltswhereverrequired
❖Reportingbyunusualoccurrence
❖Theperiodicmaintenanceconsistsofdetailedinspectionofthe
tracktodetectdefectsinthetrackwhichmaynotbedetectedduring
dailymaintenance.
❖Thevariousaspectsofperiodicmaintenanceareasbelow
❖Maintenanceoftrackalignment
❖Maintenanceoftrackdrainage
❖Maintenanceoftrackcomponents
❖Maintenanceoflevelcrossing

21. Maintenance of track materials:
The top surface of the rails should be kept at the same level
Ballast under sleepers should be regularly packed
Defective sleepers should be replaced immediately
Worn-out rails should be replaced
Kink or fracture rails should be replaced
Fastening should be tightened and oiled
Gauge should be checked and corrected
Ensure that both the rails are at same level
Maintain track drainage properly
Oiling and greasing of fishplates regularly
Flanges and check rails should be kept free from dust

22. MaintenanceofBridges:
Properembankmentshouldbeprovidednearthebridge
Avoidscouringnearabutmentsandpiers
Floodcontrolmeasuresshouldbetakennearthebridges
Rivetedjointsshouldbeinspectedperiodically
Bedblocksshouldbecheckedregularly
Steelbridgesshouldbepaintedregularly
Bearingsofthegirdersshouldbeoiledregularly
Masonryworksshouldbeinspectedregularly

23. Maintenance of rolling stock:
Lubrication of all reciprocating parts and bearings
Worn out parts should be replaced the rolling stock
It is necessary to clean the different parts every day
All axles which have run 3,22,000Km should be
replaced
A passenger vehicle used for 30years should be
dismantled and re-assembled
The locomotive boilers have to be carefully
maintained and removed every 15 years