VENTILATION SYSTEM OF METRO MAIN LINE TUNNELS WITH SECTIONS OF CONNECTION OF DOUBLE-TRACK AND SINGLE-TRACK TUNNELS Russian patent published in 2021 - IPC E21F1/08 

FIELD: ventilation systems.

SUBSTANCE: invention relates to tunnel ventilation systems. It can be used for metro tunnel ventilation. The ventilation system of metro tunnels with sections of connection of double-track and single-track tunnels includes two main line tunnels, through which trains move in opposite directions, inlet and exhaust ventilation chambers of the tunnel ventilation with ventilation installations and pressure and suction channels, respectively. At the same time, on the stage between the stations, there is an inlet ventilation shaft with the inlet ventilation chamber containing fans and pressure ventilation channels to each of the two tunnels, and at the metro stations there are exhaust ventilation chambers. The system is also equipped with an inlet ventilation chamber located in a transition chamber constructed in a pit created by an open work method using the “wall in the ground” method, and designed to connect a two-track tunnel with two single-track tunnels. The transition chamber has a longitudinal partition that provides separation in the transition chamber of a two-track tunnel into two single-track tunnels, as well as pressure ventilation channels with valves connecting the inlet ventilation chamber with each single-track tunnel within the transition chamber.

EFFECT: reduced time and material costs of the construction of the metro, as well as possibility of regulating the supply of the amount of incoming air to maintain the normalized temperature regime of the stations and main line tunnels of the metro with the sections connecting the two-track and single-track tunnels.

1 cl, 2 dwg