长大型公路隧道结构防火及消防安全探讨

Discussion on fire protection and structural fireproof measures in long road tunnels

介绍了近年来国内外典型公路隧道火灾案例,阐明了隧道火灾的特点及危害。分析了火灾条件下公路隧道的结构损伤情况,提出相应的防火保护措施。介绍了隧道火灾中烟气的蔓延规律,由此引出目前国内外普遍采用的两种隧道火灾排烟模式并进行对比分析,对不同火灾功率条件下的临界风速和诱导风速进行合理取值。初步探讨了人员逃生中疏散救援通道的设置方式,包括疏散通道的构成方式及人(车)行横通道的合理间距。

Cases of typical road tunnels at home and abroad in recent years were introduced, and fire properties and hazards of road tunnel were expounded. The damage on the structure of tunnel under fire condition was analyzed, and then fire protection accordingly was proposed. Smoke spread rule in tunnel fire was introduced, which leaded to two tunnel fire smoke extrac- tion mode widely used at home and abroad at present. The two modes, were contrasted, and then the reasonable values of the critical wind speed and induced velocity were ensured under different fire power. The setting modes of escape channels in personnel escape were discussion preliminarily, including the constitution manner of escape channels and the appropriate distance between cross-channel for people （cars） lines.