Overpressure control measures of pressurized air supply system in underground railway stations

According to the calculation formula of pressurized air supply in the current smoke control standards, analyses the calculation method of pressurized air supply in staircase and front room of a underground railway station with examples. Summarizes the overpressure control measures of pressurized air supply system from residual pressure valve, residual pressure control system with bypass valve, variable speed fan and pressure sensor control system. Combining with engineering practice, gives the optimization design ideas and countermeasures. Suggests that the residual pressure control system with bypass valves be used for overpressure control of staircases and front rooms in underground railway engineering.