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本文针对西部高原寒区电力匮乏地区的公路隧道通风问题,以西藏墨脱公路嘎隆拉特长隧道为研究背景,利用空气动力学原理,推导了隧道自然通风的计算方法。结合隧址区气候条件,分析了海拔高度对CO浓度限值的影响,论证了隧道自然通风情况下隧道洞内行车和行人的安全性和可靠性,并针对可能出现的不利工况组合和隧道消防安全要求,提出了相应的机械通风和交通管制通风补充方案。本文研究对类似特殊条件下特长隧道通风方案设计有一定的借鉴意义。
In this paper, aiming at the problem of highway tunnel ventilation in the area lacking electricity in the cold area of the western plateau, taking the Long Tunnel in Tibet Medog Highway as the research background, this paper deduces the calculation method of the tunnel natural ventilation by using the principle of aerodynamics. Combined with the climatic conditions in the tunnel area, the influence of altitude on the concentration limit of CO is analyzed. The safety and reliability of traffic and pedestrian in tunnel tunnel under natural ventilation tunnel are demonstrated. According to the possible combination of unfavorable conditions and tunnel Fire safety requirements, put forward the corresponding mechanical ventilation and traffic control ventilation supplement program. The research of this paper is of some reference to the design of ventilation tunnel of special tunnel under special conditions.