Hi guys! My name is Pankaj Thakur. This is my first ever blog, so please don't go hard at me. I'm working as a trainee in Rohtang highway tunnel and I'm sharing some of the information based on that experience.
The south portal of Rohtang Tunnel is situated at Dhundi 25km North of Manali in Himachal Pradesh. The elevation of south portal is 3060m above MSL. The North portal is situated at Khoksar, Lahaul-spiti at an elevation of 3072m above MSL. The Overall length of the tunnel is 8.8km. The interesting fact is that Rohtang Tunnel on completion will be the longest tunnel in the world at an elevation more than 10000 feet.
An emergency Egress Tunnel has been provided just beneath the main tunnel for the sake of safety during fires, tunnel lining failures etc. Often, folks say that the egress tunnel is designed to carry a vehicle of SUV size. Absolutely no! This emergency tunnel is designed to carry humans only. Rather, the top of the egress tunnel supports massive weight of traffic running in the main tunnel, as the pavemnt of roadway is placed just over the Egress tunnel. The egress tunnel is 3.6m wide and 2.25m high and is connected to the main tunnel through stairs provided at an interval of 500m along the length of the tunnel.
Talking about the geometry of the main tunnel, the main tunnel is given "Modified Horseshoe shape", the radius of curved portion is 6m. The width of the roadway is 8m (two lane highway).
The south portal of Rohtang Tunnel is situated at Dhundi 25km North of Manali in Himachal Pradesh. The elevation of south portal is 3060m above MSL. The North portal is situated at Khoksar, Lahaul-spiti at an elevation of 3072m above MSL. The Overall length of the tunnel is 8.8km. The interesting fact is that Rohtang Tunnel on completion will be the longest tunnel in the world at an elevation more than 10000 feet.
An emergency Egress Tunnel has been provided just beneath the main tunnel for the sake of safety during fires, tunnel lining failures etc. Often, folks say that the egress tunnel is designed to carry a vehicle of SUV size. Absolutely no! This emergency tunnel is designed to carry humans only. Rather, the top of the egress tunnel supports massive weight of traffic running in the main tunnel, as the pavemnt of roadway is placed just over the Egress tunnel. The egress tunnel is 3.6m wide and 2.25m high and is connected to the main tunnel through stairs provided at an interval of 500m along the length of the tunnel.
Talking about the geometry of the main tunnel, the main tunnel is given "Modified Horseshoe shape", the radius of curved portion is 6m. The width of the roadway is 8m (two lane highway).
Good infromation.
ReplyDeleteThank you sir.
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