Study On Operation Strategy Of Ventilation System Of Chongqing Metro Line Six

Subway is an important symbol of the level of urban construction.With the increase of the operating time of subway and the increase of the temperature in the tunnel,the reasonable metro environmental control system can effectively control the thermal environment in the subway system.In this paper,the piston wind speed and wind pressure in the section tunnel of Hong Tudi station of Chongqing No.6 deep buried subway station are tested and simulated by SES software.In this paper,the thermal environment and ventilation effect of subway system are studied in the different air well setting mode and the location of the wiring section.The conclusion can provide reference for the design and operation of the deep buried subway tunnel ring control system.First of all,by testing the piston wind speed and wind pressure of the tunnel at the small odometer end of the Hong Tudi station of the Chongqing Metro Line 6 subway station,the piston wind speed changes periodically with the train position is obtained,and the piston wind pressure also changes with the train position.Significant changes,The maximum change of piston air pressure is less than 700Pa,which satisfies the requirements of the specification,and the temperature and humidity of the new wind well in Hong Tudi Station are tested,and the change law of air temperature and humidity in the new wind well is obtained.Secondly,using SES software simulation to simulate the tunnel thermal environment during different operating periods of the No.6 subway line,it is obtained that the air temperature in the tunnel meets the requirements for tunnel environmental control in the early and long-term running of the train.In addition,the thermal environment of different rail exhaust volume tunnels during different operating periods was studied,and it was concluded that in the early days of train operation,the rail exhaust fan was closed,and the tunnel air temperature still met the requirements for tunnel environmental control and the long-term operation of the train.When the rail exhaust volume is 20 m~3/s,the air temperature in the tunnel meets the specifications.Finally,through the simulation of deep and shallow buried conditions on the piston air well and the thermal environment of the tunnel,it is concluded that deep burial has an impact on the temperature of the piston air well near the tunnel end,and has little effect on the overall air temperature in the tunnel.At the same time,in order to study the influence of air ventilation of different piston air wells on the thermal environment of buried subway tunnels,we also studied the thermal environment of tunnels by changing the ventilation methods of different piston air wells,and concluded that single piston ventilation can meet the requirements of tunnel environment control.The ventilation effect of single piston ventilation on the tunnel ventilation is not much different from that of double piston ventilation,but single piston can save a lot of civil investment.At the same time,the thermal environment and ventilation effect of the single-piston ventilation tunnel were studied on the different rail exhaust volume.The in-orbit exhaust volume was 30 m~3/s,and the single-piston ventilation mode could meet the requirements of tunnel environment control.Finally,the influence of different positions on the thermal environment of the tunnel at the long distance end of Hong Tudi station...