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MINI PROJECT

Construction of P.S.C

Sleeper(RAIL)

By- Anjani Kr. Shukla(Civil Engineering)

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MAIN FUNCTION OF SLEEPERS

Holding rails to correct gauge and alignment.

Firm and even support to rails.

Transferring the load evenly from rails to widerarea of ballast.

Elastic medium between rails and ballast.

Providing longitudinal and lateral stability.

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LAYING OF SLEEPERS

Sleepers shall be laid square to rails on straightand radially on curve.

The sleeper spacing should be marked on outer

rail in case of curved track. Closer spacing should be provided at joint

sleepers of fish plated joints and between joint

sleeper and shoulder sleeper. Rail joints should be suspended.

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SUSPENDED JOINT

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SLEEPER DENSITY 

The sleeper density is the number of sleepersused per rail length.

Described as M+1, M+2, M+3 etc. Where M is

the length of standard rail in meters. In case of LWR/CWR, this is expressed in

number of sleeper per Km of track.

Sleeper density depends upon max.permissible speed and traffic density.

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CONTD. … Traffic

density

A

Route

B

Route

C

Route

D Spl

Route

D

Route

E Spl

Route

E

Route>20 1660 1660 1660 1660 1660 1660 1660

10-20 1660 1660 1660 1660 1660 1660 1660

<10 1660 1540 1540 1540 1540 1540 1540

Loop

lines

1340 1340 1340 1340 1340 1340 1340

Pvt. 1340 1340 1340 1340 1340 1340 1340

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CONCRETE SLEEPERS & FASTENINGS

:

i)Mono-block Prestressed Concrete Sleepers.

a) PSC-12 for 52 Kg Railsb) PSC-14 for 60 Kg Rails

ii) Two block reinforced concrete Sleepers.

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CONTD. … 

:

Length : 2750 mm

Weight : 267 Kg Reinforcement : 18 number 3mm dia HTS

stands

Dist bet. Insert at rail seat :148mm/162 mmService Life : 50 to 60 years.

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CONTD. … 

:

i) Greater stability.

ii) Track geometry maintained for much. longerduration hence economical.

iii) Best suited for machine maintenance.

iv) Suitable for Track circuiting area.

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CONTD. … 

v) No chances of damage by fire/ corrosion

vi) No possibility of theft.

vii) No chances of gauge widening.viii) 60 Kg Sleeper can be used for 52 Kg rail.

ix) Best suited for LWR track.

x) Best performance on P & C, S.E.J. Guard rails, Level Crossings, Check rail in curve.

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CONTD. … 

:

i) Handling and laying is difficult being heavy.

ii)

Damage is very heavy in case of derailment.iii) No scrap value.

iv) Not suitable for manual packing.

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CONTD. … 

:

i) Track should be deep screened.

ii) Cuttings having rocky bed should have cleanballast cushion of at least 300 mm.

iii)On Arch bridges formation cover min. 1 m.

iv) On other bridges ballast cushion not less than300 mm.

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ELASTIC FASTENINGS

:

Provided between rails and sleepers.

It absorbs the shock.

Resists lateral movement of the rail.

Prevents abrasion of the bottom surface of rail.

Laid in such a way that grooves are parallel to

rail .

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ELASTIC RAIL CLIP (PANDROL CLIP)

Fixed in Insert to hold the rail.

Made from Spring Steel bar of 20.6 mm.

Toe Load 900Kg to 1100 Kg (MKIII).

On Fish plated Joint ‘J’ Clip can be used. 

Can be driven with ordinary 4 lbs hammer.

Can be fixed on wooden,Steel, and Cast

Iron Sleepers with Special arrangement.

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CONTD. … 

i) Metal Liners – Provided on Non track circuited

Areas.

ii) Insulated Liners- Provided on Track circuited

areas.

Most commonly used is GFN Liner

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DIFFERENT TYPES OF LINERS USED IN TRACK

S.No Sleeper Rail Metal Liner

1 60Kg 60Kg T-3740

2 60Kg 52Kg T-3741/T-3742

3 52Kg 52Kg T-3738

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CONTD. … 

S.No. Sleeper Rail GFN Liner

1 60Kg 60Kg T-3706

2 60Kg 52Kg T-3707/T3708

3 52Kg 52Kg T-3702

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THANK YOU!