重点排烟模式下坡度隧道烟气控制优化研究

针对不同坡度隧道，对重点排烟模式下的烟气控制效果进行研究。以某三车道隧道为例，采用FDS对不同坡度、单向与双向重点排烟以及不同的排烟口开启方式等多工况进行模拟研究，分析烟气蔓延长度、能见度和隧道洞口自然补风风速等关键性判据的变化规律，提出重点排烟模式下不同坡度隧道的烟气控制优化建议。

Study on the smoke control optimization ofsloping tunnel under key smoke exhaust mode

 Against sloping tunnels with different angles,smoke control effect under key smoke exhaust mode was studied. Taking a three lane tunnel as an example,using FDS,working condition of different slope,one-way and two-way key smoke exhaust mode,and different opening mode of smoke vent were simulated. The change rules of key index,such as smoke spreading distance,visibility and natural supplementary wind speed of tunnel portal were analyzed. Suggestions on smoke control optimization of sloping tunnel under key smoke exhaust mode were made.