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针对我国公路隧道设计中存在的边沟检查井不能灭火的缺陷,首次系统介绍了欧洲广泛使用的一种具有灭火和收集泄露危险品功能的边沟虹吸检查井。该检查井能有效阻止火灾在边沟中的蔓延,增加隧道防灾能力,减轻二次灾害。详细介绍了该检查井的灭火原理及结构,分析了设置虹吸井后对隧道排水、人行道以及电缆槽的影响,最后采用典型工程实例介绍了虹吸检查井的应用。该构件是一种箱形构件,既可以现场浇筑,也可以集中预制,施工技术简单,对提高国内隧道抗灾能力有一定的借鉴意义。
In view of the defect that the edge ditch inspection well in our country’s highway tunnel design can not extinguish the fire, the edge ditch siphon inspection well with the function of extinguishing fire and collecting dangerous goods is widely introduced for the first time. The inspection well can effectively prevent the spread of fire in the ditch, increase tunnel disaster prevention ability and reduce secondary disasters. The principle and structure of fire extinguishing of the inspection well are introduced in detail. The influence of setting siphon on tunnel drainage, sidewalks and cable troughs is analyzed. Finally, the application of siphon inspection wells is introduced with typical engineering examples. The component is a kind of box-shaped component, which can be poured in the field or centralized prefabricated. The construction technique is simple and it has some reference significance to improve the domestic tunnel’s disaster resistance ability.