Construction of limited height subway/elimination of level crossings

summer internship report on Construction of limited height subway/elimination of level crossings

1. RAJ KUMAR GOEL INSTITUTE OF TECHNOLOGY CIVIL ENGINEERING GHAZIABAD U.P. – 201003 SESSION:20--/20-- PRESENTATION ON SUMMER TRAINING AT NW Railways PRESENTED BY :………………………….. ROLL NO: ……………………………..

2. TABLE OF CONTENTS Name And Location of Work Indian Railways Overview Introduction Methods of Elimination of Level Crossings Methods of Adopted For Construction Cut And Cover Method Construction Procedure

3. TRAINING DURATION :- FROM 18-06-2018 TO 31-07-2018 NAME OF WORK :- CONSTRUCTION OF LIMITED HEIGHT SUBWAY/ROAD UNDER BRIDGE RINGUS UNDER NWR. DIMENSIONS OF WORK :- THICKNESS (GENERAL)-1.5M HEIGHT AND WIDTH VERIES WITH NEED

4. The first train in India ran on 16  th   April 1853 from Bombay to Thane.  The full track length of Indian Railways can circle the equator one-and-a-half times. With over 1.6 million employees, Indian Railways is the world's 9th largest employer.  With a length of 1366.33 metres , Gorakhpur in Uttar Pradesh is the longest platform in the world. INDIAN RAILWAYS

5. There are 7,500 railway stations in India.  The world’s highest railway bridge is being built over Chenab. It will dwarf the Eiffel Tower. Out of the 6449, 3691 are on Broad Gauge, 1524 on Meter Gauge and 1234 on Narrow Gauge .  Out of the 29487 level crossings across India, 6449 or 22% are still unmanned So we require Elimination of Level Crossings. INDIAN RAILWAYS

6. INTRODUCTION A very important part of the railway system is level crossing. Roads constitute the most important mode of communication in areas where railways have not developed much. Development of a country depends on the connectivity of various places with adequate road and railways network. India has   fourth-largest railway network in the world  by size, with 121,407 kilometres (75,439 mi) of total track over a 67,368-kilometre (41,861 mi) route

7.  Level Crossings Out of the 29487 level crossings across India, 6449 or 22% are still unmanned as of February 2018 . Railways also has the highest number of UMLCs   As per the data shared by the Government in the Parliament, more than 3000 level crossings are unmanned (UMLC) across the country on Broad Gauge (BG) while more than 2700 are unmanned on Meter Gauge (MG) & Narrow Gauge (NG). As per the plan submitted by the government to the Supreme Court, all UMLCs on BG are to be eliminated by 2020. 

8. 1.ROAD UNDER BRIDGES : - The movement of traffic in both perpendicular directions which is above and below is said to be road under bridge

9. 2. ROAD OVER BRIDGES :- A bridge is a span structure is built to physical obstacles such as a body of water, valley, or road, for the purpose of passage over the obstacle

10. 3.Diversion road :- A channel made to divert the flow of traffic from one course/road to another or to direct the flow of traffic form one road to another road.

11. Methods of Elimination of Level Crossing

12. CUT AND COVER METHOD The essential idea of the technique is to uncover a trench or a cut which must be roofed over and to secure the passage it must be filled with sand,concrete in-situ. It require block of about six hoursin which complete track is dismantled,excavation of embankment to the desired level is done insertion of precast rcc segment(boxes) are done. After thet filling of gaps and linking of track in done.

13. Construction Procedure The entire construction process of the project, from the earthwork excavation to the backfilling of the structures, took approximately 90 working days. This time does not include field study and surveying prior to the initial excavation and other roadway work after the backfilling. A normal working day on the project site lasted 6 to 8 hours.

14. 1.Single R.C.C. Box Segment :- A P.C.C bed of grade M30 of dimensions greater than Box segment and 200mm thickness is constructed.

15. 2.Machinery :- Machines such as Cranes, Backhoe, Excavator, Bulldozer, Soil Compactor, Roller, JCB, Transit mixture and Hydra of sufficient capacity are kept at the site for launching box segments.

16. 2.Railway Traffic Block :- With full preparation and the box, segments have been cast and they have attained their strength, the traffic block of railway line for a minimum 6 hours is to be demanded.

17. 4.Dismantling of Existing Tracking:- After issuing of traffic block, tracks are dismantled for a given length.Dismantling tracks is followed by excavation work in embankment up to a required depth.

18. After proper excavation is done, the gap provided is thoroughly inspected. Base Slab of 200 mm is constructed before placing box segments. With the help of cranes. 5.Placing of base slab:-

19. 6.Launching Of Box Segment:- With the help of cranes; Pre-cast RCC box segments are launched.

20. 7.Retaining of Earth:- Sandbags are provided to retain earth. Sandbags also serve the purpose of keeping earth and box segments in place

21. 8.Reconnection of Lines:- After box segments placed, ballast cushion is provided of required depth and railway lines are reconnected and the line is opened for the passage of trains. Traffic block is now canceled.

22. 9.Approaches construction:- After launching work the approaches on either side of box segment are constructed as per approved drawings

23. 10.Height Gauges:- The height gauge of standard design is to be provided on either end of approaches