Ventilation structure for shield tunnel and controlling method thereof

PURPOSE: A ventilating structure for shield tunnel and control method is provided to rapidly discharge smoke through a smoke duct and a smoke exhaust duct and to minimize construction costs. CONSTITUTION: A ventilating structure for shield tunnel comprises a shield tunnel(110), a plurality of smoke ducts(120), a plurality of smoke depositing ducts(130), a smoke exhaust duct(140), an outside exhaust flow path unit, a jet fan(160), and a controller. A plurality of tunnel lining(L) is consecutively installed in the shield tunnel. The tunnel lining includes a plurality of concrete segments. The smoke duct comprises an upper exhaust port(121) and a lower part exhaust pipe. The smoke depositing duct is installed in the top unit of the shield tunnel. The smoke is collected in the ceiling of the shield tunnel. The smoke exhaust duct is continuously installed in a longitudinal direction of the shield tunnel. The controller controls the exhaust fan of the outside exhaust flow path unit and the rotation quantity of the jet fan.