Numerical Simulation Study On Fire Ventilation Of Subway And Deeply Buried Long Tunnel

As the city important means of public transportation, rail transportation has become increasingly public awareness and acceptance. For mountain city, there have to be deeply buried long tunnel engineerings. Fire ventilation and smoke control as the construction of rail transit encountered a new problem which has important research significance.The results of the research have an active role in the construction of urban rail transit project in our mountains. In this paper, we use the method of three-dimensional (CFD) simulation with Chongqing Rail Transit6th line of deep long tunnels as the research object, in close connection with the actual project to propose two programs of the intermediate air shaft, the rail the headwind Road and Jet Fan. We have done detailed numerical simulation study for two ventilation and smoke control design program. We analyzed and summarized analog data carefully and proposed effective ventilation program.In this paper we established a three-dimensional physical and mathematical models according to the actual tunnel and did Numerical simulation of two different ventilation design. We analyzed characteristics of thermal plume at different shaft sending and exhaust volume, different opening groups of jet fan and different position of fire breaking out to Assess effects of different fire and smoke control programs.The paper deeply study the possible options for the subway and long tunnel ventilation and smoke control. It successfully resolved the smoke control problem in the case of train track of deeply buried long tunnel via detailed simulation analyze. Its solution to the problem with the idea is to provide a reference for other engineering problems.The research results has a guiding role.to other designed engineering solutions on the mountains and crossing river subway tunnel.