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为研究双洞互补式通风的可行性和换气风量对隧道通风的影响,基于大别山公路隧道双洞互补式通风方案,建立了1∶10的物理模型试验系统。通过测试分析,研究了2条横通道内换气风量变化对隧道内各区段风速和风压的影响规律。结果表明:互补式通风方案是可行的,通过横通道使下坡段富余的新鲜空气进入上坡隧道,可降低上坡隧道污染物浓度;使上坡段内污染空气进入下坡隧道,可降低上坡隧道的风速,从而达到“同流合污”的通风目的;增大送入上坡隧道换气通道的风量,可以降低下行隧道出口处污染物浓度,同时会使上行隧道出口处污染物浓度升高;增大送入下坡隧道换气通道的风量,可以降低上行隧道出口处污染物浓度,同时会使下行隧道出口处污染物浓度升高。
In order to study the feasibility of double-hole complementary ventilation and the effect of ventilation volume on tunnel ventilation, a 1:10 physical model test system was established based on the double-hole complementary ventilation scheme in Dabie Mountain highway tunnel. Through the test and analysis, the influence law of the change of ventilation air volume in two transverse channels on the wind speed and wind pressure in each section in the tunnel was studied. The results show that the complementary ventilation scheme is feasible. The fresh air entering the uphill tunnel through the horizontal channel can reduce the pollutant concentration in the uphill tunnel, and the polluted air in the uphill section can be lowered into the downhill tunnel Upwind tunnel wind speed, so as to achieve “Consensus foul ” ventilation purposes; increase the amount of wind sent to the uphill tunnel ventilation channel, you can reduce the downstream tunnel exit pollutant concentration, and will make the upstream tunnel exit pollutant concentration Increase the amount of wind sent to the descending tunnel ventilation channel can reduce the concentration of pollutants at the exit of the upstream tunnel and increase the concentration of pollutants at the exit of the downstream tunnel.