Research on Optimization of Parallel Heading Tunnel Ventilation Scheme in Parallel Double Hole Highway Tunnels
Based on the No.1 Daliangshan Tunnel in Liangshan Yi Autonomous Prefecture,Sichuan Province,the fluid dynamics Fluent software was used to numerically simulate and study the flow field of the parallel heading tun-nel ventilation scheme,and the original scheme was optimized and verified.The research results indicate that there is polluted air circulation in the original plan.Optimization schemes such as setting air doors or jet fans on the trans-verse passage,changing the position of air doors during the parallel headnig,or adding jet fan cluster have been proposed;Through numerical simulation of the optimized scheme,it was found that adding jet fans in parallel head-ing can solve the problem of sewage circulation.It is recommended to use SSF-6.3 jet fan;And the scheme was ver-ified.The maximum concentration of CO in the tunnel was less than 0.002 4％,and the maximum concentration of CH4 was less than 0.25％,both met the ventilation requirements.The relevant research conclusions can provide ref-erence for the optimization of similar tunnel ventilation schemes.
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