Page 54 - Traffic infratech magazine

INFRASTRUCTURE

Undersea tunnel, Uttarakhand. It will reduce travel Zojila Pass Tunnel
distance from Dharasu to Yamunotri by
Mumbai-Ahmedabad 20km and travel time by about an hour. The 14.2-km long Zojila Pass tunnel
bullet train corridor The construction will entail a 4.531km project in Jammu and Kashmir, with a
long, two-lane bi-directional tunnel with Parallel Escape (egress) tunnel, will be
India’s first undersea tunnel by the implemented by MoRTH through NHIDCL.
National High-Speed Rail Corporation escape passage including approaches
Limited (NHSRCL) is a part of the on Dharasu -Yamunotri section between Situated at an altitude of 11,578
Mumbai-Ahmedabad bullet train Chainage 25.400km and Chainage feet on the Srinagar-Kargil-Leh National
project. This includes testing as well 51.000km in Uttarakhand. The project Highway, it will provide all-weather
as commissioning for double-line high is likely to be completed in four years. connectivity to the region. Considered
speed railway for the project using Rohtang Tunnel Asia’s longest bi-directional tunnel, it will
tunnel boring machine (TBM) and a new be an engineering marvel as it will be
Austrian tunnelling method (NATM). The Rohtang tunnel will provide an the first-of-its-kind in such a geographical
The bullet train project will have 21 all-season connectivity to Lahaul Valley area, with as many as nine curves. It will
enable speed of 80 kmph, and will have
kilometres long underground corridor. in Himachal Pradesh. It will be one of the latest safety features such as a fully
Around seven kilometres of this the country’s longest road tunnels at transverse ventilation system, emergency
underground corridor is under the Thane approximately 8.8km. Being built in the lighting, CCTVs, radio system, pedestrian
creek. Of this, 1.8 km long section will Eastern Pir Panjal ranges on the Leh- cross-passages at every 250 metres,
be developed under the seabed, while Manali Highway – under the Rohtang emergency telephones, fire-fighting
the remaining part of the stretch is to be Pass, the horseshoe-shaped tunnel is cabinets at every 125 metres, and
built under the mangroves marshland likely to be completed by 2020. motorable cross-passages and lay-bys at
on either side of the creek. The corridor The development work is being carried every 750 metres.
for Mumbai-Ahmedabad bullet train will out by Border Roads Organisation in The project will adopt state-of-
be 508 km long with a speed of 320 collaboration with Afcons. The tunnel the-art methods of construction,
kmph, the bullet train is expected to will reduce road distance by nearly 46 out-of-the-box technical solutions, and
complete a journey between Mumbai km and will save up to five hours of real-time supervisory control and data
and Ahmedabad in just around two travel between Manali and Keylong. It acquisition. The carbon dioxide would
hours. has the capacity to ply 3,000 vehicles be removed from the tunnel through
Char Dham Tunnel per day under any weather condition. a tower, seven times higher than the
It will also provide ample room for two-
The Char Dham tunnel project way traffic and is designed to cater to a Qutub Minar. Construction time of the
project is estimated to be seven years
will connect Kedarnath, Badrinath, maximum vehicular speed of 80km per because of the difficult terrain.
Yamunotri and Gangotri at hour.
Z-Morh Tunnel

The 6.5 km long Z-Morh road tunnel
is being constructed near Gagangair
in Ganderbal district of Jammu and
Kashmir. Along with the Zojila tunnel
(which is 22 km from Z-Morh tunnel
towards Leh) the Z-Morh tunnel will
ensure year-long road connectivity
between Srinagar and Kargil.
The tunnel is designed for flow of
1,000 vehicles an hour at an approved
maximum speed of 80 km per hour. The
tunneling is proposed through NATM in
view of the fragile Himalayan geology
with 2022 the completion timeline
estimate.

54 June-July ’19 / TrafficInfraTech www.trafficinfratech-com-500653.hostingersite.com