道路隧道排风塔通风工艺设计要点

Main Points of Ventilation Process DesignforAir Exhaust Tower of Road Tunnel

为了达到有组织、顺畅排除道路隧道内污染空气之目的,综合了国内外道路隧道排风塔设计和实测资料结果,提出了排风塔通风工艺设计要点:排风塔有效高度计算,从空气动力学原理选择排风塔型式,降低排风塔阻力损失措施、防止进/排风塔两次污染的间距和计算排风气柱动量抬升高度的Bosanquet公式和sutton大气扩散模式等,可供设计和环境评价时计算参考使用。

In order to achieve an organized,smooth extraction of exhaust air in road tunnel,the main points of ventilation process design of air exhaust tower are proposed according to the design documents of exhaust air tower of road tunnels either in China or abroad and field data: the calculation of effective height of air exhaust tower,tower type selection by aerodynamic theory,measures to reduce tower resistance loss and prevent flow mutual influence of exhaust air and inlet fresh air due to close distance between air exhaust tower and intake tower,Bosanquet equation which is used to calculate momentum lift height of exhaust air column and Sutton atmospheric dispersion pattern.