The key elements of a railway track include the formation, ballast, sleepers, rails, and fastenings. The formation provides a stable base and drainage. Ballast supports and distributes loads from sleepers. Common sleepers are wooden, steel, or concrete. Rails provide a smooth surface for trains and guide wheels. Fastenings like fish plates, bolts, and chairs connect rails and sleepers to form the track. Together these elements allow heavy trains to operate safely at high speeds.
Permanent Way of Railway & Components ?(part -1,2,3,4,5)RAMPRASAD KUMAWAT
Permanent Way Components: , Selection of Alignment, Ideal Permanent Ways and Cross-sections in different conditions, Salient Features and types of Components viz.
Rails, Sleepers, Ballast, Rail Fastenings.
Types and Selection of Gauges
Railway engineering
The branch of civil engineering which deals with the design , construction and maintenance of the railway tracks for safe and efficient movements of train is called Railway engineering.
In this, some railway terminology and their types are discussed.
Railway terminology – (1)Ballast (2)Rails (3)Sleepers (4)Points of crossing
(1) Ballast - Ballast in railroad terminology is durable granular material placed between the crosstie and the sub ballast to hold the track in line and grade.
(2) Rails - The rolled steel sections laid end to end in two parallel lines over sleepers to form a railway track are known as rails.
(3) Sleepers - Sleepers are the transverse ties that are laid to support the rails. They transmit wheel load from the rails to ballast.
(4) Crossing – A crossing is a device which provides two flange ways through which the wheels of the flanges will move, when two rails intersect each other at right angle.
Permanent Way of Railway & Components ?(part -1,2,3,4,5)RAMPRASAD KUMAWAT
Permanent Way Components: , Selection of Alignment, Ideal Permanent Ways and Cross-sections in different conditions, Salient Features and types of Components viz.
Rails, Sleepers, Ballast, Rail Fastenings.
Types and Selection of Gauges
Railway engineering
The branch of civil engineering which deals with the design , construction and maintenance of the railway tracks for safe and efficient movements of train is called Railway engineering.
In this, some railway terminology and their types are discussed.
Railway terminology – (1)Ballast (2)Rails (3)Sleepers (4)Points of crossing
(1) Ballast - Ballast in railroad terminology is durable granular material placed between the crosstie and the sub ballast to hold the track in line and grade.
(2) Rails - The rolled steel sections laid end to end in two parallel lines over sleepers to form a railway track are known as rails.
(3) Sleepers - Sleepers are the transverse ties that are laid to support the rails. They transmit wheel load from the rails to ballast.
(4) Crossing – A crossing is a device which provides two flange ways through which the wheels of the flanges will move, when two rails intersect each other at right angle.
Permanent Way of Railway & Components ?(part -1,2,3,4,5)RAMPRASAD KUMAWAT
Permanent Way Components: , Selection of Alignment, Ideal Permanent Ways and Cross-sections in different conditions, Salient Features and types of Components viz.
Rails, Sleepers, Ballast, Rail Fastenings.
Types and Selection of Gauges
Railway Engineering:
Permanent Way, Rail Gauge, Broad Gauge, Meter Gauge, Narrow Gauge, Choice of Gauge, Uniformity of Gauge, Rails - Double headed, Bull Headed, Flat footed Rails, Sleepers, Ballast, Formation, Types of sleepers, Merits and Demerits, Functions of sleepers, Requirements of good sleepers,Spacing of sleepers, Sleeper Density, Characteristics of good ballast, Capacity of a railway track, Track Fixtures and Fastening, Types of fixtures and fastening, Fish Plates, Dog Spikes, Rail Joints, Creep of Rails, Indication of Creep, Disadvantages of creep in rails, Remedies for prevention of creep, Theory of creep, Coning of Wheels, Theory of coning, Adzing of sleepers, Gradients, Grade compensation on curves, Radius and degree of curves, Super-elevation, Negative cant, Cant Deficiency, Equilibrium speed, Maximum permissible speed, Necessity of geometric design, Track defects, Transition curves, Vertical curves, Points and crossings, Types of crossings, Turnouts, Switches, Interlocking, Signalling, Classification and types of Signals, Semaphore type signal, Detonating signals, Dock signals, Shunting Signals, Warner Signals, Reception & Departure Signals, Railway Station, Purpose of a Railway Station, Site selection for Railway Stations, Track Drainage, Why Need of Proper Drainage.
Airport Engineering:
Basic Terms (AAI, ICAO, IATA), Airport System plan, Master plan, Airport Classification, Site Selection, Imaginary Surfaces, Aircraft Characteristics, Important components of Airport Layout, Runway, Runway Configuration, Runway Orientation, Factors affecting Runway Orientation, Wind Direction Indicator, Wind Rose Diagram - Type I & Type II, Basic Runway Length, Corrections for Elevation, Temperature & Gradient, Actual Runway Length, Runway Geometric (ICAO), Taxiways, Exit Taxiways, Location of Exit Taxiways, Holding Aprons, Hanger, Terminal Building, Aircraft Parking, Airport Marking & Lightning.
Harbours: History of water transportation, components of harbour, classification of harbours.
Introduction of Transportation Engineering
Harbours Engineering maximum data use for civil engineering students.
Permanent Way of Railway & Components ?(part -1,2,3,4,5)RAMPRASAD KUMAWAT
Permanent Way Components: , Selection of Alignment, Ideal Permanent Ways and Cross-sections in different conditions, Salient Features and types of Components viz.
Rails, Sleepers, Ballast, Rail Fastenings.
Types and Selection of Gauges
Railway Engineering:
Permanent Way, Rail Gauge, Broad Gauge, Meter Gauge, Narrow Gauge, Choice of Gauge, Uniformity of Gauge, Rails - Double headed, Bull Headed, Flat footed Rails, Sleepers, Ballast, Formation, Types of sleepers, Merits and Demerits, Functions of sleepers, Requirements of good sleepers,Spacing of sleepers, Sleeper Density, Characteristics of good ballast, Capacity of a railway track, Track Fixtures and Fastening, Types of fixtures and fastening, Fish Plates, Dog Spikes, Rail Joints, Creep of Rails, Indication of Creep, Disadvantages of creep in rails, Remedies for prevention of creep, Theory of creep, Coning of Wheels, Theory of coning, Adzing of sleepers, Gradients, Grade compensation on curves, Radius and degree of curves, Super-elevation, Negative cant, Cant Deficiency, Equilibrium speed, Maximum permissible speed, Necessity of geometric design, Track defects, Transition curves, Vertical curves, Points and crossings, Types of crossings, Turnouts, Switches, Interlocking, Signalling, Classification and types of Signals, Semaphore type signal, Detonating signals, Dock signals, Shunting Signals, Warner Signals, Reception & Departure Signals, Railway Station, Purpose of a Railway Station, Site selection for Railway Stations, Track Drainage, Why Need of Proper Drainage.
Airport Engineering:
Basic Terms (AAI, ICAO, IATA), Airport System plan, Master plan, Airport Classification, Site Selection, Imaginary Surfaces, Aircraft Characteristics, Important components of Airport Layout, Runway, Runway Configuration, Runway Orientation, Factors affecting Runway Orientation, Wind Direction Indicator, Wind Rose Diagram - Type I & Type II, Basic Runway Length, Corrections for Elevation, Temperature & Gradient, Actual Runway Length, Runway Geometric (ICAO), Taxiways, Exit Taxiways, Location of Exit Taxiways, Holding Aprons, Hanger, Terminal Building, Aircraft Parking, Airport Marking & Lightning.
Harbours: History of water transportation, components of harbour, classification of harbours.
Introduction of Transportation Engineering
Harbours Engineering maximum data use for civil engineering students.
Significance of Road, Rail, Air and Water transports - Coordination of all modes to achieve sustainability - Elements of permanent way – Rails, Sleepers, Ballast, rail fixtures and fastenings, - Track Stress, coning of wheels, creep in rails, defects in rails – Route alignment surveys, conventional and modern methods- - Soil suitability analysis - Geometric design of railways, gradient, super elevation, widening of gauge on curves- Points and Crossings
Railways Harbors Tunneling and Airports Module 1 complete presentation as per VTU Syllabus
• The gauge should be correct and uniform.
• The rails should be in proper level. In a straight track, two rails must be at the same
level. On curves, the outer rail should have proper super elevation and there should be
proper transition at the junction of a straight and a curve.
• The alignment should be correct i.e., it should be free from irregularities.
• The gradient should be uniform and as gentle as possible. Any change of gradient
should be followed by a smooth vertical curve, to give smooth riding quality.
• The track should be resilient and elastic in order to adsorb shocks and vibrations of
running tracks.
• The radii and super elevation on curves should be properly designed and maintained
Introduction to railway tracks. in above presentation the types of rails, requirements and failures of rails is thoroughly mentioned in layman language.
Hello Dear,
I'm an Engineer Aamir Khasru Mohammad Chowdhury. Nick name Aryan Khasru. I'm a Civil Engineer (B.Sc In Civil Engineering). But I am also working or interested as like as Architecture, Interior Design, Exterior Design, Event Management and made Model Making Idea, Handicraft & Handmade Design Idea for Home Decorate & Life Style etc. I come from Chittagong, Bangladesh. That's all about myself.
Hello Dear,
I'm an Engineer Aamir Khasru Mohammad Chowdhury. Nick name Aryan Khasru. I'm a Civil Engineer (B.Sc In Civil Engineering). But I am also working or interested as like as Architecture, Interior Design, Exterior Design, Event Management and made Model Making Idea, Handicraft & Handmade Design Idea for Home Decorate & Life Style etc. I come from Chittagong, Bangladesh. That's all about myself.
The presentation include basic introduction about Sleepers, Ballasts, Track Fitting & Fastenings. The presentation is made according to KUK syllabus.For any query feel free to drop a line in my inbox amanbathla710@gmail.com.
Unlocking Productivity: Leveraging the Potential of Copilot in Microsoft 365, a presentation by Christoforos Vlachos, Senior Solutions Manager – Modern Workplace, Uni Systems
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The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
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Why are attacks on smart factories rising?
Cyber risk predictions
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2. ELEMENTS OF RAILWAY TRACKS
A railway track is a
combination of
1. Formation
2. Ballast
3. Sleepers
4. Rails
5. Fastenings
3. 1. FORMATION
The surface prepared to receive the ballast,
sleepers, rails, etc.. for constructing the
railway track is called formation or sub grade.
4. Function of formation
The formation has the following functions
It provides a smooth and uniform bed on
which the track is laid.
It bears the entire load transmitted from the
moving loads to it through the ballast.
It provides drainage facilities.
It provides stability to the track.
5. Design aspects
WIDTH
The width of the formation depends upon
Numbers of tracks to be laid over it.
Gauge of the track.
Width of ballast layer.
Width of drains provided.
HEIGHT
The height of the formation depends upon the topography of the
alignment and the gradients adopted.
SLIDE SLOPES
The slide slopes of the formation depends upon the characteristics
of the soil, as shear strength, angle of repose etc.
6. 2. BALLAST
Ballast is a layer of
broken stone, gravel, or
any other suitable
material placed under
and around the
sleepers for distributing
the load from the
sleepers to the
formation
7. Functions of Ballast
It provides a suitable foundation for the
sleepers.
It transfer and distributes loads from the
sleepers to a larger area of formation.
it provides effective drainage to the track.
It helps in protecting the top surface of the
formation.
8. Physical Properties of Good Ballast
It should be hard and tough.
It should war resistant and durable.
It should be non-porous and non-absorbent
of water.
It should be cheaper and easily available.
It should not be brittle.
It should not allow rain water to accumulate
9. Types of ballast
Following materials can be used as ballast:
1. Broken stone
It is the best material to be used as ballast.
Generally on all important tracks broken stone ballast has
been used.
Blast of Igneous rocks is the most suitable
2. Gravel
It stands second in suitability as ballast.
Used in large quantities in many countries.
It is obtained from river beds
10. 3. Cinders or Ashes
The residue obtained from the coal used in
locomotives is known as Cinder or Ash.
4. Sand
It stands fourth in merits as ballast material.
Coarse sand is better than fine sand.
5. Brick ballast
Where stone or other suitable ballast is not
available, over burnt brick ballast can be used.
11. 6. Kankar
It is found in the form of particles of varying
sizes.
Where stone is not easily and at reasonable
price available, kankar can be used as road
metal and ballast for railway tracks.
12. 3. SLEEPERS
Sleeper is transverse support for a railway to give
stiffness to it.
Functions of sleepers
Holds the rails to correct gauge.
Give a firm and even support to the rails.
Distributes the axle load over a sufficiently large area
of ballast.
To act as elastic medium between the rails and ballast
to absorb vibration.
To maintain the alignment of the track.
To provide insulation for electrified track.
13. Classification of sleepers
Depending on the material used for their manufacture,
the sleepers can be divided into the following
categories
Wooden sleepers.
Steel sleepers.
Cast iron sleepers.
Concrete sleepers
14. WOODEN SLEEPERS
Wooden sleepers are
the ideal type of
sleeper. Hence they are
universally used. The
utility of timber sleepers
has not diminished due
to the passage of time.
15. ADVANTAGES
Wooden sleepers have the following
advantages:
They are easy to manufacture
They are more useful for heavy loads and
high speeds
They are easy to handle without damage
They are more suitable for soft formations
They absorb shocks and vibrations better
than other types of sleepers.
16. DISADVANTAGES
They are easily liable to attack by vermin and
weather. Hence their life is lesser than other
type of sleepers
They are susceptible to fire.
Their maintenance cost is highest in
comparison to other type of sleepers
Their useful life is short about 12 to 15 years.
17. STEEL SLEEPERS
Due to the increasing
shortage of timber in
the country and other
economical factors
have led to the use of
steel and concrete
sleepers on railways.
19. ADVANTAGES
It is more durable. Its life is about 35 years
Lesser damage during handling and transport
Easy to manufacture
It is not susceptible to vermin attack
It is not susceptible to fire
Its scrap value is very good
20. DISADVANTAGES
It is liable to corrosion.
Cracks at rail seats develop during the
service.
Fittings required are greater in number.
22. ADVANTAGES
It is more durable having greater life.
It is economical as compare to wood and
Steel.
Easy to manufacture.
It is not susceptible to vermin attack
It is not susceptible to fire
23. DISADVANTAGES
It is brittle and cracks without warning.
It cannot be repaired, and required
replacement.
Fittings required are greater in number.
24. 4. RAILS
Definition and Function
Rail is an iron beam.
Its main function is to provide a most
economical, smooth and level surface for the
smooth passage of heavily loaded vehicles at
great speed.
The two rails of the track also serve as a
lateral guide for the running of the wheels.
25. Classification
Rails can be classified
into the following
categories:
Double headed rail
Bull headed rail
Flat footed rail
26. DOUBLE HEADED RAIL
It is of I section or Dumb-bell section.
Such rails have to be supported in chairs which rest
on sleepers.
The idea was that when the head of the rail was
worn out during the period of service, the rail could
be inverted. Later it was found that during the
service the bottom table of the rail was dented by
the long and continuous contact with the chair to
such an extent that it was impossible to reuse it.
Hence it was rejected and other types of rail were
searched.
27. BULL HEAD RAIL
It is similar in shape to double headed rail with only
difference that in bull headed rail more metal is
added to the head to allow the greater wear and
tear.
The lower head or table was kept of just sufficient
size to be able to withstand the stresses to be
induced by moving loads.
This rail also required chairs for fixing it to the
sleepers.
28. FLAT FOOTED RAIL
It is in inverted T-shaped rail.
Having greater stability.
It was developed by charles Vignoles in 1836
29. Fastenings
The devices used to connect rails and sleepers
together to form the track are known as
fastenings. These includes:
Fish plates
Bolts
Chairs
Keys
Bearing plates
30. FISH PLATES
The function of a fish
plate is to hold two rails
together.
At each, joint a pair of
fish plates is used.
Fish Plate
31. BOLTS
Various types of bolts are used in
railroad fitting. Some common
types are enumerated below.
Fish bolts:
With each pair of fish plates
two, four or six fish bolts are
used.
The standard practice is to use
four bolts.
They are made up of high
carbon steel to with stand
considerable stresses.
32. Dogspikes:
Dogspikes are used for
holding the rail to the
wooden sleepers.
The spike has smooth
sites and depends for its
holding power on the
friction of wood fiber.
33. Skrewspikes:
Skrewspikes are used
for the same purpose
as dogspikes
But have a much
greater holding power
than dogspikes
approximately double
that of dogspikes.
34. Roundspikes:
Roundspikes are used
for fixing chairs to the
wooden sleepers.
Fangbolts:
They have the same
purpose as
roundspikes.
Have greater strength
as compared to
roundspikes as they
have threads and also
grip the sleeper from
the Bottom
35. CHAIRS
Chairs are used to hold
the double headed and
bull headed rails in
position. Invariably
chairs are made of cast
iron and they help in
distributing the load
from rails to sleepers.
36. KEYS
They are generally
wedge shaped wooden
pieces or metal pieces.
They keep the rail in
proper position.
Wooden keys are
cheaper, but liable to
be attacked by vermin.
Hence a number of
metal keys have been
devised.
Key
37. BEARING PLATES
Chair used for flat
footed rails are known
as bearing plates.
They increase the
bearing area on the
sleeper and thus
decrease the loading-
intensity.