Urban Transport Infrastructure November 2018 Urban Transport Infra November 2018 | Page 13

Metro & Railways
Cantilever piers and portals were
constructed at appropriate places to
provide a smooth transition for the
curves wherever required to take care
of the shifted alignment due to
curvature.
Earlier DMRC had constructed
sharpest broad gauge curve on its
elevated section in Gurgaon near
IFFCO Chowk with a radius of 282.05
meters in Phase II and 242 meters
curve on standard gauge between
Okhla and Jamia in Phase 3.
Crossing the Railway Station at Anand
Vihar Site
Another
major
engineering
challenge was encountered when the
viaduct had to cross the Anand Vihar
Railway Station of the Indian
Railways, one of the busiest stations
in terms of ridership and number of
trains. In fact, two piers had to be
erected on the Anand Vihar Railway
platform itself and large spans
(around 70 meters) had to be erected
to avoid any kind of disturbance to
the Railway station. DMRC engineers
had to ensure that the train schedule
of the Indian Railways was not
disturbed during the DMRC’s
construction. Despite this difficult
challenge,
DMRC
successfully
completed this stretch in a planned
manner, without affecting the routine
working of the Indian Railways.
For crossing this area of Indian
Railways, six piers were erected in
the railway compound in such a way
that there was no infringement of the
Metro line with the railways.
Provision of future development
plans of the Railways was also kept in
mind so that the Metro piers would
pose no problem to any such plans in
the future.
Two piers were placed on the
running platforms where it was
difficult to work with round-the-clock
train and passenger movement.
Due to the peculiar placement of
piers in the railways land, the spans
are quite large. One of the spans
which are designed between pier no.
235 and 236 are almost 70 meters
long. In order to cater to the
requirement of special spans, cellular
lightweight
concrete
(CLC)
construction has been done with the
help of bridge builders. This
construction methodology has helped
in continuous construction without
interfering in the movement of trains
to and from the Anand Vihar Rail
WWW.URBANTRANSPORTNEWS.COM
MoS Housing & Urban Affairs Hardeep Singh Puri, Delhi Dy. CM Manish Sisodia, Delhi
Transport Minister Kailash Gahlot and BJP MP Manoj Tiwari flagging off the Pink Line train
for Shiv Vihar-Trilokpuri Sanjay Lake Section.
terminal.
These piers are located at the
periphery of the Anand Vihar
Railway station. Two of the piers are
located on the platforms of the Anand
Vihar Railway station of Indian
Railways.
DMRC has crossed the railway
lines in a very safe and systematic
manner with all safety precautions in
place and without affecting the daily
train movement on the section in
coordination
with
the
Indian
Railways. The work was done only
after
obtaining
the
necessary
approval from the Commissioner for
Metro Rail Safety (CMRS).
DMRC’s Rare Feat at Karkarduma
Metro Station
The Delhi Metro has achieved a
rare feat in Metro construction by
crossing over its existing operational
line at the Kakarduma Metro Station
at a record height of 21 meters above
the ground.
Construction for crossing over of
Metro viaduct at the existing
Karkarduma Metro station was never
an easy task for the Metro engineers.
It posed numerous challenges to the
civil engineers throughout the
project, as this is one of the highest
crossings of the Metro project. The
Majlis Park-Shiv Vihar Corridor is
crossing the existing Vaishali-
Dwarka elevated line (Line-4) 21
meters above the ground and is 10
13
meters above the existing Metro line.
The work was done without disrupting
the normal daily Metro train/passenger
services for even a single day.
This new alignment of Line-7 is
crossing the existing Vaishali – Dwarka
Metro alignment at Karkarduma just
before the existing Karkarduma station
at an angle of 114 degrees. DMRC had
to carry out segmental erection for
putting a special span of 37 meters
between pier no. 254 and pier no. 255.
Delhi Metro has crossed the existing
Metro line at such a height in a very
safe and systematic manner with all
safety precautions in place. The
launching of the girder and erection of
the span was carried out with extra
precaution.
An extensive round the clock CCTV
monitoring was done adjacent to the
rail track to avoid any sign of
electrocution and fall of material during
the crossing. The monitoring consisted
of earthing provided to the launching
girder, pre-stressing beam, erected
segments or any other loose item kept
on the span. The work was carried out
during the shadow block of the existing
system during non-operating hours after
getting all the clearances from the
competent authorities.
It was in all likelihood that the
engineering challenges would have
compelled the engineers to compulsorily
to disrupt the passenger/Metro train
services on some crucial days. Given the
fact that the Dwarka – Noida/Vaishali
Urban Transport Infrastructure | November 2018