civil engineering summer traning from L&T ppt By vikash kumar yadav 988106700

2. A
PRESENTATION
ON
WDFC Project
Submitted to Submitted by
Vikash kumar Yadav
12EJACE117

3. DETAILS OF PROJECT
 Name of project:- Western Dedicate Freight
Corridor
 Cost of project:-6700 crore

4. CONTENTS
 PREPARING THE TRACKBED
 LAYING THE TRACK
 JOINING THE TRACK SECTION
 ADDING BALLAST
 SLEEPERS
 RAILS

5. Preparing the Track bed
The track bed is carved into the landscape, using scrapers,
graders, bulldozers and other heavy machinery layer of
compact gravel is spread on the track bed. This, after being
compacted by rollers, provides an adequate surface for
vehicles with Tyres.

6. Laying the track
This time, the crane rides on the two rails that were just laid alongside the
temporary track. A train of flatcars, half loaded with LGV sleepers, arrives at the
site. It is pushed by a special diesel locomotive, which is low enough to fit
underneath the gantry cranes. The cranes remove the panels of temporary track,
and stack them onto the empty half of the sleeper train. Next, they pick up sets of
30 LGV sleepers, pre-arranged with the proper spacing using a special fixture.
The sleepers are laid on the gravel bed where the panel track was. The sleeper
train leaves the worksite loaded with sections of panel track.

7. Joining track sections
The sections of rail are welded together using thermite. Conventional
welding (using some type of flame) does not work well on large metal
pieces such as rails, since the heat is conducted away too quickly. Thermite
is better suited to this job. It is a mix of aluminium powder and rust (iron
oxide) powder, which reacts to produce iron, aluminum oxide, and a great
deal of heat, making it ideal to weld rail.

8. Adding ballast
A first layer of ballast is dumped directly onto the track, and a tamping-lining-
levelling machine, riding on the rails, forces the stones underneath the sleepers.
Each pass of this machine can raise the level of the track by 8 cm (3 in), so several
passes of ballasting and of the machine are needed to build up a layer of ballast at
least 32 cm (1 ft) thick under the sleepers. The ballast is also piled on each side of the
track for lateral stability. The machine performs the initial alignment of the track

9. Finishing construction
Now that the first track is almost complete, work begins on the adjacent track. This
time, however, it is not necessary to lay a temporary track. Trains running on the
first track bring the sleepers, and then the rail, which is unloaded directly onto the
sleepers by dispensing arms that swing out to the proper alignment. The Nabla
fasteners are secured, and the ballast is stuffed under the track as before.

10. PILES
 A slender, structural member
consisting steel or concrete or timber.
 It is installed in the ground to transfer
the structural loads to soils at some
significant depth below the base of
the structure.

11. PILES

12. PILES FOUNDATION IS USED WHEN:
The soil near the surface doesn’t have
sufficient bearing capacity (weak) to support
the structural loads.
 The estimated settlement of the soil exceeds
tolerable limits
 Differential settlement due to soil variability
or non-uniform structural loads is excessive
 Excavations to construct a shallow foundation
on a firm soil are difficult or expensive.

13. BALLAST
Ballast is the granular material usually
broken stone or bricks single and kanker,
gravel and sand placed and packed and
around the sleeper to transmit Load
from sleeper to formation Layer.
Size = 20mm – 65mm

15. Sleepers
Sleepers are members generally laid transverse
to the rails, on which the rails are fixed to
transfer the loads from the rails to the ballast
and the subgrade.

16. Types of Sleepers
Wooden Sleepers
Metal Sleepers
Concrete Sleepers

18. Concrete Sleepers

19. Metal Sleeper

20. RAILS

21. Types of Rails :-
The rails used in the construction of railway track
can be divided into the following three types :
(1) Double Headed Rails (D.H. Rail)
(2) Flat Footed Rails (F.F. Rail)
(3) Bull Headed Rails (B.H. Rail)

22. THE RAILS HAVING THEIR HEAD
AND FOOT OF
SAME DIMENSIONS ARE KNOWN
AS DOUBLE
HEADED RAIL (D.H.).
1. Double Headed Rail :-

24. 2. FLAT FOOTED RAILS :-
The rail section having their foot
rolled to a flat are known as
flat footed rails.

26. 3. BULL HEADED RAIL :
The rails sections having their head of
more dimension then that of their foot
are known as bull headed rails
(B.H.).