Sochi TunnelSochi Tunnel

JZR 112-45/4
Total power
810 kW
16,3 km
Number of lanes
4 (2 in each direction)

The project was part of the Federal Building and Infrastructure plan for the Sochi Olympics and for the development of the city of Sochi.

The project was designed and the construction work supervised by JSC Institute Stroyproekt, and was carried out in three phases: The first phase from the river Agura to Zemlyanichnaya Street (5670 m long); the second phase from Zemlyanichnaya Street to the river Sochi (5280 m long) and the third phase from the river Sochi to the river Psaje (5330 m long). The contract for the first phase was awarded to “OAO “TO-44” company, and for the second phase to OAO Mostotrest.

General characteristics of the project


During the construction phase, Zitrón axial fans model ZVN 1-14-132 / 6 powered with 132 kW electric motors were installed to ensure the ventilation of the tunnels under construction.

The tunnels are equipped with Zitrón ventilation systems for air quality control and for the safe evacuation of people through the passageways connecting the double tunnels. The ventilation system is designed and built with the use of ZITRON JZR jet fans. This ensures a quality ventilation under normal conditions, and also enables the delivery of a sufficient volume of air for the safe evacuation of people in an emergency situation. The jet fans are installed in the tunnel ceilings in groups of 2, 3 units along the length of the tunnel, set away from the traffic area.

In several tunnels, ventilation is in both longitudinal and transversal directions. Thus, in the double tunnel 8-8a, the maintenance of normal and emergency air quality parameters is further guaranteed by the use of ZITRON ZVN axial extractor fans, in addition to the use of jet fans. Axial fans type ZVN are also installed in the ventilation system of Tunnel 1 for emergency ventilation.

The axial fans ZVN are designed to operate as part of the general ventilation, resisting temperatures up to 600 ºС, the axial fans can work for a minimum of 2 hours in smoke evacuation mode. The impeller is equipped with a mechanism for manual adjustment of the blades, provided the fan is stopped. A frequency converter is used to adjust operating parameters as well as to start the fan. The fan can be operated manually by means of a control panel, or remotely. The ventilation system for all the tunnels of the Kurortny relief road comprises 6 axial extractor fans with a total rated power of 1300 kW.

To ensure the safe evacuation of people in emergency situations, the passageways connecting the tunnels of the Kurortny Avenue relief road are equipped with Zitrón CCS safety modules.

The CCS modules are designed to facilitate a safe emergency evacuation of people through the passageways that connect two tunnels. The CCS modules equipment maintain an overpressure in the passageways, preventing the entry of flammable products and allowing, in the case of fire, the safe passage of people from the damaged tunnel to the other tunnel.

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