Chenani Nashri Tunnel-A Burrow in the Himalayas

Chenani Nashri Tunnel-A Burrow in the Himalayas
March 19, 2019 No Comments Did You Know? Rohit Singh

Chenani-Nashri Tunnel or Patnitop Tunnel is the longest road tunnel in India in Jammu and Kashmir on NH 44. The initiative of constructing India’s longest road tunnel was taken in 2011 and it was 2nd April 2017, when it got inaugurated by the Honorable Prime Minister Narendra Modi. Apparently, NH-44 is also the longest highway in India running over 3,745 km.

What is the length of Chenani Nashri tunnel?

Chenani-Nashri is the longest road tunnel in India with a total length of 9.28 km (5.8 mi). Also, it happens to be the first one in the country to have a fully incorporated tunnel control system. The passage lessens the separation between Jammu and Srinagar by 30 km and travel time by two hours. Moreover, the tunnel is designed and built in such a way that it bypasses places like Patnitop, Kud and Batote that often faces obstacle from snowfall and avalanches every winter obstructing NH 44 with long queues of traffic, sometimes for days or a week.

Chenani Nashri tunnel project budget

The main cheque to build this two-way tunnel was ₹2,520 crores (US$350 million) yet raised to a whole of ₹3,720 crores (US$520 million).

Chenani Nashri tunnel project start date

The foundation was laid for the job in July 2011 by the, then Jammu and Kashmir Chief Minister Omar Abdullah with Union Health Minister Ghulam Nabi Azad, under the choice UPA government.

Chenani Nashri tunnel project completion date

The date of fulfillment for the task was May 2016 and the concerned company was quite hopeful of finishing the construction by December 2015, which was around five months before the due date. A short time later, in light of an inquiry between the advancement workers and the executing association, the work was conceded and the target of completion before schedule couldn’t be achieved. The proposed completion date was June 2016, which was then furthermore extended to July 2016.

What affected the project most to get delayed?

Time and again, the project was affected due to horrendous atmosphere conditions and snowfall on the roadway, which snapped the power supply to the domain in the month of February 2017. Also, a report suggests that due to demonetization in November 2016, the work was affected drastically as labourers were failed to be paid their daily wages in cash. Independent Engineers (IEs) report says that the transitory specialists were not ready to assemble the instruments and handles of little entirety in view of the constraints of aggregate withdrawal from the Bank accounts. Even the sub-contractors were not able to purchase the principal material from the adjacent market due to non-availability of cash.

Also read: India all set to get its first underwater metro in Kolkata

Chenani Nashri tunnel start date

The burrow in the Himalayas was finally opened to all 2nd April 2017. The advancement included around 1,500 creators, geologists and specialists, other than the capable workers. The National Highways Authority of India has consumed around 3,720 crore rupees on the project.

Chenani Nashri Tunnel
Chenani Nashri tunnel

Chenani Nashri tunnel internal design

Inside the Chenani-Nashri tunnel, there are two chambers that run parallel to each other — the basic traffic section of separation crosswise over 13m and an alternate security or break entry of broadness 6m close by. The two chambers — each around 9 km long — are related by 29 cross sections at standard intervals of each 300 meters along the entire length of the entry. These sections mean around 1 km of entry length, and the essential and flight tubes, notwithstanding the cross areas, make up around 19 km of section length.

Technology used inside the tunnel to avoid Oxygen deficiency

Since such a long entry could show the issue of the absence of oxygen, to ensure that there is no absurd carbon-dioxide create inside, there are a couple of vapour meters that will check the air all through the length of the section. With sounds, every 8 meters, conveying common air into the rule chamber, and exhaust outlets every 100 m opening into the broken tube, the section is the world’s sixth — and the country’s first — road tunnel with a transverse ventilation system. Transverse ventilation will keep exhaust smoke inside the entry at any rate level in order to balance suffocation and keep detecting quality at agreeable measurements.

Chenani Nashri tunnel Control Room

The 29 cross areas between the two entries will be used to void, through the escape tunnel, a customer who might be stuck in an unfortunate situation or to tow away any vehicle that may have slowed down in the essential entry. A total of 124 cameras and a straight warmth recognizable proof system inside the section will alert the Integrated Tunnel Control Room (ITCR) arranged outside the entry to the necessity for intercession. By virtue of an inconsequential criminal offense, the Control Room instructs the traffic police sent outside the section, who will constrain a fine on errant drivers on the spot.

What are the safety measures taken?

  • SOS boxes presented at every 150 m will go about as emergency hotlines for labourers in a bad position. To connect with the ITCR in search of help, one would simply need to open the portal of the SOS box and state ‘Hey’, said authority of the errand. Suburbanites can use their mobile phones inside the entry.
  • To hinder decreasing of vision due to advance in the light while going in or leaving the section, the lighting inside has been adjusted at a tendency of shining quality.
  • The entry is worked with fire safety efforts. At the point when sensors recognize fire, a prosperity tradition will kick in, and the pushing of regular air will stop and just drains will work. Longitudinal vapour fans presented at standard breaks will concentrate on 300m on either side of the fire, pushing the smoke upward.
  • Ambulances or vehicles helping foam will race through the break section to purge suburbanites and fight the fire.
  • The heat detection system inside the entry will record climbs in temperature in the section — the result of superfluous radiations, which may be realized by no less than one vehicle. In such cases, the ITCR will associate with staff inside the section, and the chargeable vehicle will be moved over into a lay-by and afterward cleared by a crane through the parallel break tunnel.

Chenani Nashri tunnel map

The entry is arranged at a rise of around 4,000 feet in the troublesome Himalayan region. Despite having been uncovered in such geographic conditions, the two barrels are absolutely waterproof. In perspective on this two-way tunnel, the detachment among Chenani and Nashri and thus among Jammu and Srinagar is lessened by 30 km and travel time is cut by two hours. The section avoids 44 exuberant slide and torrential slide slanted spots on the interstate. It is an “all-atmosphere” tunnel and enables an extension in return and the movement business in the state. The section furthermore has parking spots if there ought to be an event of vehicle breakdowns.

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