Yangtze River Tunnel – A Project Of E&C ... - Roof & Facade

Image Courtesy: Mott MacDonald
TRANSPORTATION
Delhi Metro, India – Target
on Track
Rolling stock of Delhi Metro
One of the challenging
part of the line to construct
was Mandi House
on Line 3. Mandi House
Station is located under
Sikandra Road, a busy
and thriving thoroughfare
in the city. Much of
the station had to be
built top-down. The
diaphragm wall panels
built from the ground
level formed the permanent
walls of the station
THE Delhi Metro Rail Corporation
(DMRC) started its construction on 1
October 1998 and by November 2006,
all the three lines in Phase 1 of Delhi
Metro, totalling 65 km (40.4 miles) were
operational, three years ahead of
schedule. Delhi Metro is an integrated
transport system designed to include
operation with other public transport
systems of Delhi.
Route & Infrastructure of Phase I
Line 1 starts at Sharada in the east of
Delhi. It runs for 22 km through 18 stations
and was inaugurated in March
2004 with the opening of elevated
Inder Lok-Rithala section. Line 2,
which is of 11 km, is the most challenging
route since it runs entirely underground
between Vishwa Vidyalaya
(Delhi University, North Campus) and
Central Secretariat. The route also runs
through city centre and the important
business district at Connaught Place.
Stations in this route which are located
12.85m below ground, were built by
cut-and-cover construction method. In
Chawri Bazar station, which is 20m below
ground, tunnelling method was
employed. Line 3 which is 33.5km long,
runs mostly on elevated grade or at
grade except for a short underground
section in central New Delhi. Line 3 in-
tersects with Line 2 at Connaught
Place, as an interchange for lines.
Mott MacDonald
Mott MacDonald, a leading engineering
and development consultancy, was
the design consultant for the 7 km
stretch of underground Metro Corridor
starting from ISBT in the North to Central
Secretariat in the south covering six
stations – Delhi Main, Chawri Bazaar,
New Delhi, Connaught Place, Patel
Chowk and Central Secretariat which
comprises the prime locations of the
city. The tunnels were bored as twin
tunnels toward the Northern half and
cut-and-cover type on the southern
stretch beyond Patel Chowk stations.
Mott MacDonald scope of work for
this challenging project included architectural,
electrical and mechanical
works. Architectural work includes station
design, urban design, environmental
control system and landscaping
work around station. Above ground,
design of buildings to fit into the existing
context for each station was also
included in the scope. The Electrical
and Mechanical work consisted of
power & earthing layouts for stations,
preparation of single line diagrams for
power distribution, lighting layouts for
●See page 19
18 ICA Volume 2 Issue 7 2008