公路隧道通风系统的防灾响应

Response of Ventilation System to Fire Disaster in a Highway Tunnel

从公路隧道通风系统的设计着手,对隧道发生火灾时洞内通风系统作用于风流的响应时间及污染物的影响长度进行了分析计算。依据隧道内异常情况的要求,提出了对现有通风系统的设计进行评估的基本思路和方法。根据通风系统灾害情况下不同风流组织的响应时间,对比现有风机的基本性能及运转情况,提出了公路隧道在防灾设计方面的思路及存在的问题,以及"对通风系统的响应需作出明确规定;发生火灾时应慎重考虑风机的反转工况"等建议。

Based on the design scheme of the ventilation system of a highway tunnel, the paper analyses the response time of the ventilation system and diffusion distance of polluted air in case of a tunnel fire,describes briefly the basic concept and methods for evaluating the current ventilation system according to the possible abnormal status in the tunnel, and presents the design considerations for highway tunnel disaster prevention together with some problems noticed. It is aimed at promoting the further research on the highway tunnel disaster prevention.