ABSTRACT
Nowadays, a majority of extra-long road tunnels adopt longitudinal ventilation methods and combine the vertical or inclined shafts and jet fans. However, such methods have the problems of expensive civil construction costs and high operating costs. The single-channel blowing-in longitudinal method emerges in recent years. Only one ventilation channel is set between the left and right main tunnels, and rich fresh air at the entrance of the downhill tunnel is sent to the exit of uphill tunnel through the ventilation channel. The authors compared the theory and applicable conditions of single-channel method and single shaft method with MATLAB. It can be concluded that the single-channel method can reduce the operation energy consumption and has a good application prospect.
