civil engg

1. Industrial
Training
L&T SUCG JV Project-CC27(majenta line)
Project Director-Mr. R. G. Saini
Site - Munerika.
Station Manager- Mr. Brijesh Garg

2. • An endeavour over a period can be successful only
with right guidance and mentorship. I take this
opportunity to express my gratitude to all those
who encouraged me for successful completion of
Project Training.
• I am deeply indebted to Mr RG Saini, Project
Director for providing me this opportunity to work
in such a prestigious organisation.
• I owe my sincere regards to Mr. P.R.Lenka whose
management at site made it possible for me to
learn and gave me a healthy learning environment.
ACKNOWLEDGEMENT

3. • I express my sincere and profound thanks to Mr. Amrutesh
who acted as a guide map, who steered me throughout my
training through his excellent guidance and knowledge.
• I owe warm hearted acknowledgement of gratitude to Mr.
Sumit Dev who helped me a lot in my initial days clearing my
irritating questions and making myself comfortable in L&T
family.
• I forfeit my respect to Mr. Rajeev Kumar whose guidance
along with encouragement enabled me to work very
efficiently throughout my period of Training.
• The field training can’t be complete through some people. I
also extend my thanks to all other members especially Mr.
Prashant Kumar Pandey whose guidance gave a way to my
learning.
• And last but not the least my co trainees who made the
training like being in a family and for those healthy and
productive discussions.

4. • Larsen & Toubro is a major Technology,
engineering, construction, manufacturing and
financial services conglomerate. L&T addresses
critical needs in key sectorsInfrastructure, Power,
Process Industries and Defense- for consumers in
over 30 countries around the world.
• CC-27 is L&T SUCG Joint Venture Project. The
project contains five stations (Hauz Khas, Vasant
Vihar, Munirka, and IIT&RK puram)
About the Project

5. • L&T SUCG CC27 DELHI planned to build a tunnel
from the end of the underground ramp(near the
metro station Shankar Vihar)to metro station Hauz
Khas and underground ramp near the Metro
Station Shankar Vihar and the underground metro
station at Vasant Vihar, Munirka, RK Puram, IIT
,Hauz Khas.
• The project was commenced on November 2012
and was to be completed in 42 months i.e. May
2016 but the deadline has been extended and now
the project is expected to complete by December
2016.

6. WELDING WORK
FOR CRADDLE

7. REMOVAL OF SHUTTERING FROM
ES03@ MUNERIKA

9. • 1. The shortened construction period due to
simultaneous construction of the basement and
the superstructure.
• 2. More operational space gained from the
advanced construction of floor slabs.
• 3. The higher stiffness of floor slab compare to steel
struts improves the safety of excavation.
• 4. It is highly suitable for construction for tall
buildings with deep basements constructed in
urban areas.

10. • 1. Higher cost (due to the construction of pile
foundation)
• 2. Since the construction period of the basement is
lengthened, the lateral displacement of retaining wall
or ground settlement may possible increase due to the
influence of creep if the soil layers are encountered.
• 3. The construction quality may influence because of
worsened ventilation and illumination under floor slab.
• 4. It requires highly skilled supervision and labour force.
:

11. Guide wall
Diaphragm wall
Plunge columns
Roof slab
Concourse slab
Base slab Platform

12. • Construction sequence followed in the
roof slab is as under: Excavation for
the roof slab is done in parts starting
from one side of the station. The
exaction depth for a roof slab of
900mm is kept about 950mm. 50
mm thick layer of plane cement
concrete is poured on the base, PCC
acts as a barrier between soil and the
concrete and also acts as load bearing
surface for the slab. A 3mm thick ply
is placed over the finished PCC surface.
Fe 500D re bars are placed with clear
cover of 50mm.

13. • Concreting is put in continuous layers not extending more
than 300mm.Each layer is compacted by vibrating needle
before any succeeding layer. Immersion vibrators are 21
operated in vertical position and should not touch the bars
and water stoppers are put at the cutouts. A 5mm thick
water proofing layer is provided. To prevent damage to the
water proofing layer. Over the water proofing layer
another layer of PCC screed is provided 50mm thick, for final
leveling and development of the slope. Backfilling is done
over the finished slab, with sand followed soil. The sand
provides better path for drainage of the water seeping from
ground level.

14. • Following are the details of the Concourse slab:
• Thickness: 550mm
• The entire area of the concourse has been divided into 39
rooms including the station unpaid and the paid area.
• Following are some of the rooms present in the concourse:
1. ECS plant room (2).
2. Electrical panel room (2).
3. Electrical UPS room.
4. DB room.
5. Ticket office room TOR.
6. EFO 7. Telecom Equipment room TER.
8. Male toilet 9. Female toilet
10. Cleaner’s room.

16. • 2 It is a nonpublic area under platform consisting of
electric lines, services of drainage, sump (3). PCC of
300mm is done as it will be final coating and no tile
work will be done. It is double walled to
accommodate booster fans. Channels lead to sump.
• Columns for Platform slab (450*300) are given. It
consists of ASS 1&2. Earth mats are installed
underneath. Copper earth electrode: 22.5mm dia.
And 3m long. Size of riser of earth mat is 400 m2.
Copper conductors rise up to platform and are
enclosed in pipe.

17. • Block works: Block work parallel to
the D-wall is done. The block adds
to the aesthetic look of the station
plus creates path way for the
drainage system and also covers it.
• Block used are made of concrete.
Some of the details of Concrete
blocks used in the station are:
Dimension: 400x200x200 and
400x200x100.
Compressive strength: 7.5 MPa
(N/mm2 )
Density: 1800 kg/m3

18. • After two layer of block work scupper drain is
constructed between d-wall and block wall.
• PCC of grade M15 with waterproofing admixture is
laid first having 1:200 slope between low point to
high point.
• Then a 200mm half drain scupper drain is
constructed. Afterwards the waterproofing coat is
applied and screed 1:3 is done.
• Figure below shows the section of scupper drain.

20. • Given below is list of the scope of all finishing works:
• Stone cladding
• Flooring
• Tiles
• painting
• Plumbing
• False ceiling
• Glass
• SS works
• Mild steel railing

21. • Stone cladding is a thin layer of real or artificial stone
applied to a building or other structure made of a
material other than stone. Here in the station stone
cladding has been done to cover the block work.
• Almost entire area of the walls (except for Rooms in the
concourse and the station unpaid area) is covered with
cladding. Stone cladding may be classified into two
types: Dry stone cladding. The dry stone cladding
method uses fixed or embedded anchors or ties to
attach the stone to the block wall.
Wet stone cladding. Wet cladding uses an adhesive to
adhere the stone to the block wall. Here in the station
dry cladding is done.

22. • The dry cladding method is safe and
chances of stone falling down at a later
date is remote. b. Method allow for
expansion and contraction of stone in
extreme weather conditions. c. The dry
cladding method creates a gap of
around 50mm in between back wall
and stone lining , providing a layer of
air cushion that acts as a thermal
barrier. d. The appearance of stone
used in dry cladding work looks
aesthetically pleasing. The stone fixed
with mortar may change in color due
to absorption of water from back
mortar layer. The stones are cladded
on the block wall with the help of
clamps that are bolted into the block
wall with the help of drilling machine.
Figure below shows the clamp used in
the station.

23. Details of the Stones used for
cladding:
For cladding two types of stones
are used namely,
Jhallore Beige Granite (1200x600).
Tan Brown Granite (1200x600).
The thickness of both the stones is
30mm.
The height of wall cladding:
3300mm (as per drawing)
CLAMP USED FOR STONE CLADDING

24. Flooring is the general term for a permanent covering of
a floor, or for the work of installing such a floor covering.
Floor covering is a term to generically describe any finish
material applied over a floor structure to provide a
walking surface. Here in the station flooring works
include:
Honed Granite stone
Kota stone
GRC tactile
Polished vitrified tiles.
Matt vitrified tiles.
IPS flooring with hardener.
False floor
Glased tiles.

25. • Typical Steps to be followed during stone lying:
• Leveling and marking.
• Surface preparation.
• Mix preparation.
• Placing of Mix.
• Fixing of granite.
TOTAL STATION
(USED FOR SURVEYING,
PLOTTING OF POINTS ETC.)
Hazard tiles and Directional tactiles

26. • The plumbing system in the station is for the storage,
collection and the treatment of the waste water
generated. The waste water has been classified into two
categories namely,
• Sewage water.
• Seepage water.
• This waste water will be collected in sumps in the
undercroft level. Sewage water will be collected from
the toilets and stored in the sewage sumps- 160mm dia
and 110mm dia UPVC (Ultra Polyvinyl Chloride) pipes
are used to transport swage from toilets to the sump.

27. From the sump two 80mm dia
GI sewage riser pipe and one
80mm dia vent pipe lead to
the transportation of raw
water from sewage pit to the
ground level.
Upvc pipes used in plumbing

28. • The painting works on the station includes the following:
Acrylic Emulsion Paint.
Acrylic Washable Distemper.
Texture Paint.
Synthetic Enamel Paint.
• False Ceiling: Metal false ceiling is done to cover the ducting
and wiring trays on the ceiling and to give an overall
aesthetic look to the station.
Metal false ceiling panels are of dimension 1200x600.
Threaded rods are used to for the fixing of panels to the
ceiling. These threaded rods are fixed at every 1200m
interval.

29. • Glass Work
• Following are types of glass to be used in the
station:
Toughened Glass of 8mm thick vinyl with intense
magenta color.
Toughened Glass of 8mm thick with frosted film.
13.52mm thick laminated glass.
8mm vinyl glass with intense magenta
•Stainless steel and mild steel works:
• Stainless steel railings The difference between two
SS blancks is 900mm.
• SS sheet cladding
• Mild steel Railing in the ancillary

30. This is a new technique of crossing underground
dependent on hydraulic system. It is suitable where
intensity of traffic at construction location is too heavy
and can’t be disturbed i.e. conventional open cut
method not possible. However the risk of settlement has
to be taken care of. Construction Sequence:
Utilities passing through the area are identified and
diverted.
Next we install soldier piles. They are spaced @ 1.5m c/c
with wooden leggings fixed in between to act as
retaining wall for further excavation.
Excavation is carried out 1m below strut level .1st layer
and second layer of strut are installed during the course
of excavation.

31. • After excavation till formation level the bed is
levelled and PCC done. Thrust bed(1m) and thrust
wall is constructed to transfer the thrust of jacking
force to soil at bottom.
• Pin pockets are provided as per drawings for
provision of jacking supports.
• First segment of box will have a cutter shield. Cutter
edge is made of MS plate and fixed to box using
anchor bolts. After completion of work it is cut and
removed. Drag sheet ( GI sheet/galvanised iron) is
provided to reduce drag between soil phase and box
segments. For this purpose anchor and
arrangements on 1st box is made.

32. • Box is casted in 3 stages.
Bottom slab, walls, top slab. Main feature of it are the
haunches that provide extra support
Thereafter jacking progresses, the front unit with shield
penetrates into soil and after every 200mm of push,
excavation within shield is carried out(manually).
After 1st segment advances to end of thrust bed , 2nd
box is brought in alignment and the procedure
continues. Rate of pushing is around 1-1.5 m/day. There
is intermediate jacking support left between base of
two boxes. forward pushing jacks(150 TN) fill the space.
1st box has additional jacks(wall and roof) for adjusting
the alignment during pushing. 20 mm thick MS plate is
provided at rim of boxes.

34. • The boring of tunnel line is carried by SUCG JV. It is
fully carried out through TBM ,from boring to
segment fixing as well. Diameter of tunnel is 5.7m.
It starts from launching shaft and ends at retrieval
shaft. Rk Puram had a retrieval shaft where the
tunnel digging ended that was started from
Munirka. Segments are precasted in casting yard at
Mundaka. A ring comprises of 5 segments and a key.
They are made of concrete of M50 grade. This line
of DMRC will have a standard gauge(1435 mm).

36. It consists of :
• Cutter head
• Front shield to hold cutter
• Mid shield that has jacks and conveyor belt to remove
excavated soil
• End shield deals with segment building .
• At one go length equal to 2 segments(1.2*2m) is excavated
and then ring building starts.
• Tail segment
• Gentry
• These holes are grouted simultaneously and the segments
are interlocked through banana bonds.

38. •Cross Passage:
• The upside and downside lines are interconnected
through cross passages spaced every 250m providing a
safe access between two tunnels in event of emergency.
It is a pit dug in slab for fitting escalator machinery. Std.
size used for it is 6.5m*1.75m.
• Three holes, 1st for main power cable, 2nd for signal
sensor, 3rd for sprinkler is left while construction. A
drainage pipe is also provided at bottom. Lift: For ease of
PD person, lift is provided at entry structures and within
station from concourse to platform. Its std. size is
2500mm*1900mm. Pit is 1500mm deep. Upper portion
between lift top and roof slab is left for block work. Last
20mm gap is filled with dry mortar packing as a
cushioning material for vibrations.

39. • Staircase:
Setting of survey points is done with great accuracy. They consist of
riser(140mm) and tread(300mm).
After every 8-15 steps there is a platform. The inside of station consists of
4 staircase, 2 public and 2 non-public.
Ventilation system:
The whole station is underground and it should cater to huge amount of
commuters every day. Also when the metro enters the station area from
tunnel it creates a huge pressure difference. Surely, this has to be dealt
with.
Tunnel Ventilation Shaft (TVS): to ensure adequate air quality in station
area.
Booster fans: In cut N cover. To balance pressure difference when train
enters and leaves station.
Over Track Exhaust (OTE) ducts: Over track area. It is made of precast
concrete segments and is grouted.
Booster fans: At undercroft wall.
Fresh air corridor and exhaust air corridor.

40. SUBWAY CONSTRUCTION
• Subways will come up at Munirka, Dabri, RK Puram,
IIT, Panchsheel Park, Chirag Delhi and Nehru Enclave.
• The subway planned at the Munirka Metro station is
expected to cater to a large number of people trying
to access Munirka Village and the market. The
station at Munirka will be one of the busiest ones on
the corridor and will cater to approximately 19,000
people per day in 2016.

41. • The subway will be located near the Munirka flyover
and will be in the unpaid area.
• The subway is being constructed using the box
pushing technology, with which vertical excavation
or large scale digging is not required. This method is
much faster than the conventional cut and cover
technology used generally for construction of
subways. For this subway, had we opted for the
conventional cut and cover technology, we would
have had to excavate the road above, which would
have disrupted traffic movement.

42. The total length of the
subway will be
approximately 43m. Seven
precast RCC boxes will be
pushed, with an internal size
of 4.2m by 4.7m and length
of each box being 6.3m.
• The condition of the road
above will be monitored
through various high
precision instruments during
the construction period.

43. Thanking You…..