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Vikash9887106700 l&t ppt

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

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Vikash9887106700 l&t ppt

  1. 1. A PRESENTATION ON WDFC Project Submitted to Submitted by Vikash kumar Yadav 12EJACE117
  2. 2. DETAILS OF PROJECT  Name of project:- Western Dedicate Freight Corridor  Cost of project:-6700 crore
  3. 3. CONTENTS  PREPARING THE TRACKBED  LAYING THE TRACK  JOINING THE TRACK SECTION  ADDING BALLAST  SLEEPERS  RAILS
  4. 4. 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.
  5. 5. 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.
  6. 6. 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.
  7. 7. 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
  8. 8. 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.
  9. 9. 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.
  10. 10. PILES
  11. 11. 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.
  12. 12. 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
  13. 13. 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.
  14. 14. Types of Sleepers Wooden Sleepers Metal Sleepers Concrete Sleepers
  15. 15. Concrete Sleepers
  16. 16. Metal Sleeper
  17. 17. RAILS
  18. 18. 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)
  19. 19. THE RAILS HAVING THEIR HEAD AND FOOT OF SAME DIMENSIONS ARE KNOWN AS DOUBLE HEADED RAIL (D.H.). 1. Double Headed Rail :-
  20. 20. 2. FLAT FOOTED RAILS :- The rail section having their foot rolled to a flat are known as flat footed rails.
  21. 21. 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.).

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