Road regulations must be observed underground too. You don’t think anymore that you know everything about the Moscow Metro after reading our previous articles about it, do you (1, 2)? Do you want to find out more about it and its utility lines? So, go ahead!
With these enormous ventilators they ventilate the tunnels and stations of the metro.
The ventilators from behind.
These shutters regulate the air stream.
With this hermetic door, they could cut off the venting channel in case of a war or an anthropogenic accident.
This is how all metro tracks end.
A hermetic door to block the tunnel.
An entrance leading into the vent shaft.
Another hermetic door.
A door lock striker.
In this room situated under the station platform, they usually lay cables.
The illuminated sign ‘Dangerous Zone’ warns those who love to ride on top of a metro train.
Bends and curves.
Location: Moscow
via dOcent
This underground building technology is fantastic! Seems like these tunnels will last forever!
The hermetic doors are more commonly use as fire protection. They allow parts of the system to be sealed off in the event of accident and fire. Any fumes can then be vented out of the tunnels before they spread beyond the immediate area. This protects crowds at stations beyond the fire location and limits the number of casualties.