NEW DELHI (Metro Rail News): In a first for India, tunnel hood technology is being introduced for the Mumbai-Ahmedabad Bullet Train Project. Tunnel hood technology will enable the high-speed train to enter and exit tunnels smoothly by gradually regulating air pressure. These hoods act as a transition zone between the open environment and the confined tunnel space. The installation of these hoods will provide a seamless and quieter travel experience for the passengers.
Significance of Tunnel Hood Technology
Tunnel hood technology is a special structure constructed at the entrance and exit of tunnels. When the bullet train enters a tunnel, it emits a large amount of air. This sudden movement creates pressure waves that travel through the tunnel. Tunnel hoods help air move in and out more gradually, controlling pressure changes and improving the overall efficiency of the system.
Where are these hoods being installed?
The Mumbai-Ahmedabad Bullet Train Project passes through challenging landscapes, which include seven mountain tunnels in Maharashtra and one in Gujarat. Tunnel hoods will be installed at both ends of these mountain tunnels.
The tunnel hoods on the Bullet Train corridors minimise tunnel boom noise generated by high-speed train movement while exiting, lower disturbance to surrounding communities and support safe and efficient operation of trains travelling at very high speeds.
Simply put, these tunnel hoods help the train and the air adjust to each other gradually rather than abruptly, making the train travel experience smoother, quieter and more comfortable.
Tunnel hoods are widely used in countries with high-speed rail systems where train speeds exceed 300 kmph. The introduction of tunnel hoods represents a major advancement in the development of India’s high-speed rail project.
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