This internship summary provides details about Vikas Kumar's internship at the Delhi Metro Rail Corporation Project CC 66 with Hindustan Construction Company Ltd. The key points are: 1. The project involved the design and construction of twin tunnels, an underground ramp, and an underground station from chainage 2580.00 to 4120.628 on the Dwarka-Najafgarh corridor of Delhi Metro Phase III. 2. The contractor was Hindustan Construction Company Ltd working for client Delhi Metro Rail Corporation Ltd. The project commenced in April 2014 and was to be completed in 36 months by April 2017 with a total budget of Rs. 300 crore. 3. The scope of work

1. Internship done at Delhi Metro Rail
Corporation Project CC 66
Hindustan Construction Co Ltd
By – Vikas kumar
(1/14/FET/BCI/2/078)

2. DMRC CC 66
This project consist of the design and
construction of twin tunnel by shield TBM, U/G
ramp, U/G station including architectural
finishing, water supply & drainage works from
chainage 2580.00 to 4120.628 on Dwarka-
Najafgarh corridor of phase-III of Delhi MRTS.
Introduction

3. CLIENT DELHI METRO RAIL CORPORATION
LTD.
CONTRACTOR HINDUSTAN CONSTRUCTION
COMPANY LTD.
DATE OF COMMENCEMENT APRIL 21, 2014
COMPLETION PERIOD 36 MONTHS
DATE OF COMPLETION APRIL 21, 2017
FUNDING AGENCY DELHI METRO RAIL CORPORATION
LTD.
TOTAL COST ₹300 CRORE

4. Site location

5. Scope of work
1.54 km long twin tunnel on Dwarka-Najafgarh
metro corridor of phase III of Delhi metro.
Construction of one of the biggest underground
station which is 290 meters long and 30 meters
in width.
The station will be built at depth of 18 meters.

6. A. Conventional Bottom-Up construction
B. Top-Down construction
There are two types of construction methods

7. Top-Down
Construction method
In this method of construction the
roof slab is constructed first, after
that remaining work like concourse
slab and base slab is completed
under beneath the roof slab.
This method is used at Najafgarh
station.

9. Bottom-Up
Construction method
In this type of construction method base slab is constructed first
after that concourse slab and then roof slab. This type of
construction method is used where space availability is more i.e. not
congested.

10. Tunnel
 Tunnels are constructed with the
help of the TBM.
 Type of tunnel in project DMRC
CC 66 is twin tunnel.
 Inner diameter of the tunnel is
5.8m.
 Outer diameter of tunnel is 6.2m.
 There are 6 segment keys in 1
ring.
 A cross passage is provided
after every 200 rings.
 The lower most level of the
tunnel in this project is 18 m.

11. Launching shaft

12. Retrival shaft

13. Cross passage
Cross passages are
the path provided after
every 200 rings
between two tunnels
for emergency exits or
repair work.

14. Core Cutting Machine

15. Soldier piling

16. Sump tank
Sump tank is used to
store rain water. Sump
tank also resist the
excessive rain water
from entering in the
tunnel. Water collected
in sump tanks are
pumped out of the tank
by pumps.

17. Open Ramp

18. Shuttering of wall

19. Closed Ramp

20. Roof slab of station

21. Vibratory roller
Vibratory roller is used
for compacting the soil
before binding of
reinforcement of roof
slab.

22. Diaphragm Wall

23. Excavation of sand for D-wall by MAIT machine

24. Concreting of D-wall type 1

25. Waterproofing compounds

26. Waterproofing done over Covered Ramp

27. Steel yard

28. Excavation under roof slab

29. Ancillary Building Construction

30. THANK YOU