Research and Optimization of Parallel Heading Ventilation Scheme for Super-long Highway Tunnel
Hu Bin · Journal of Highway and Transportation Research and Development · 2011
To offer economic and reasonable ventilation scheme and design parameters for super-long single-hole bidirectional highway tunnel,in design of ventilation of Lanjiayan tunnel of Mianzhu-Maoxian highway in Sichuan,considering some restraint factors such as engineering geology and environmental protection and so on,the scheme of semi-transverse ventilation of parallel heading tunnel to the benefit of recovery and tunnel construction was selected.In the scheme of ventilation of parallel heading tunnel,based on the tunnel gradient line,the neutral point of pressure of wind and the reasonably organized wind current were computed,and the rescue scheme of fire in super-long single-hole bidirectional highway tunnel was provided.Under the conditions of different locations of fans and cross passages,ventilation of tunnel was computed.The optimum neutral point of wind pressure of sections near the tunnel portals under different conditions was gotten to make the demand of wind,difference of wind pressure,and total-power of fans to be minimum.Based on the result of computation and analysis,the optimum design parameters of ventilation of super-long single-hole bidirectional highway tunnel was gotten.