摘要
为了优化公路隧道自然开口及射流风机的位置,实现降低隧道建设成本、节约能源和减少环境影响的目的,以开设自然开口的公路隧道分段式纵向通风方式为研究对象,通过建立公路隧道的通风数学模型,研究自然开口和射流风机的布置位置对隧道C0浓度分布的影响。研究表明:设置自然开口后,隧道内污染物浓度分布情况并非一定优于不布置自然开口;在多自然开口通风方案中,将距离隧道出口较近的自然开口作为排风自然开口可提高分污效果;将自然开口集中布置在隧道后部,同时将较多的射流风机布置在自然开口群后端,可增大隧道出口的实际通风量并降低隧道出口污染物浓度。
To optimize the positions of natural openings and jet fans in highway tunnel, and to achieve the purpose of reducing the construction cost, saving energy and reducing the environmental impact, taking the longitudinal ventilation system of urban tunnel section with natural openings as a study object, we studied the influence of positions of natural openings and jet fans on CO concentration distribution in the tunnel through establishing highway tunnel ventilation mathematical model. The results show that （1） with the natural openings, the pollutant concentration distribution is not always better than the situation without roof openings ; （2） among the multiple natural ventilation opening schemes, it will promote purification effect when the natural openings are near the tunnel exit as exhaust natural openings; （3） by centralizing natural openings in the back of the tunnel and putting more jet fans behind the natural openings, the pollutant concentration will decrease and actual ventilation rate will rise up at tunnel exit.
出处
《公路交通科技》
CAS
CSCD
北大核心
2014年第8期151-158,共8页
Journal of Highway and Transportation Research and Development
基金
2010年度天津市科委科技支撑重点计划项目(10ZCKFSF02300)
关键词
环境工程
城市隧道
数学模型
CO浓度分布
自然开口
射流风机
environmental engineering, urban tunnel, mathematical model, CO concentration distribution, natural opening
jet fan
