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| Chenani- Nashri tunnel fitted with state of the art technology | | reduces journey by 31 kms, ready for commissioning | Jammu, March 18, (Scoop News)-After successful trial runs, India’s longest surface tunnel in Jammu region is likely to be commissioned any time between March end and first week of April, well informed sources told Scoop News on Saturday.
“The tunnel is complete in all aspects and ready for the use,” the sources added.
Giving details, the Project Director, JS Rathore, said 9.2 kilometre long tunnel connecting Chenani and Nashri on 300 km long Jammu-Srinagar national highway was built at the cost of over 3,720 crore and completed in nearly five years. With this, 41 km journey covered earlier in over two hours between the two points has now been reduced to about 10 km and traversed in nearly 25 minutes.
State of the Art, he said the tunnel has 13 metre Dia and has 9.2 km escape tunnels with six metre Dia. After every 300 metre escape tunnel is connected with 29 cross passages and each passage is one km long. 124 CCTV fixed cameras from Chenani to Nashri have been installed for monitoring the smooth flow of two way vehicular traffic inside the tunnel. In case of an emergency, SOS booth has been set up inside the tunnel.
The tunnel is equipped with high decibel announcement system with 70 speakers at different places Rathore said, adding there are 4,000 lights installed. 600 bulbs of 150 Watt in the escape tunnels, 1,200 lamps along footpaths on both sides for pedestrians besides 120 traffic signals have been installed for the lighting purpose.
At the two ends of the duct PTZ cameras capable of rotating 360* have been installed in addition of 20 cameras fixed at the entrance points and toll plaza, Rathore said, adding “tunnel is also equipped with heat assessment cable to monitor inside it.”
To maintain the pollutions levels under control, he said 710 horsepower 2.5 Dia metre fans have been installed on both ends of the tunnel which rotates from 0-30 RPM automatically and could be raised to 200 RPM, this is supported by two Jet fans to exhaust Carbon Monoxide and inject fresh air into the duct from both sides.
He said both entrance and exit are monitored by the sensors. Automatic Incidence Device (AID) sensors that could keep a tab on speed, reverse motion, halting of vehicle, fallen object, pedestrian movement inside the tunnel, fire and smoke is monitored inside the control room.
With an installation capacity of 128 tetra byte hard disk, the monitors have a recording capacity for 14 days. Inside the control room a large video wall screen can display 16 pictures simultaneously and it can be changed to different parts for viewing. In addition, pictures from 15 cameras can be viewed on three computers, according to requirement by the officials manning it.
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