Experiment Study Of Influence On Long Road Tunnels Fire By Shaft

In this paper, the focus is placed on the long road tunnels with shaft. The rule of temperature field, pressure field and smoke distribution in the tunnel, in the short channels and in the shaft is studied, On the basis of which, some suggestions are put forward for organization of ventilation and exhaust smoke in the condition.Firstly, the paper has introduced the characteristic, reason, damages of the tunnel fire and anti-disaster characteristic of vary ventilation mode. Then, combined theoretic analysis and fire experiment, when fire occure different sections, the paper analyzes the temperature distribution, the temperature changing with vary ventilation mode, the temperature changing with vary height of shaft, the rule of temperature distribution along landscape and longitudinal orientation. In the same time, the rule of pressure distribution includes the pressure and air velocity changing with vary ventilation mode, the pressure and air velocity changing with vary height of shaft, and fire ventilation pressure that is mostly discussed is studied, the fire ventilation pressure of vary height of shaft are compared and studied.By way of analyzing, the paper offers the ventilation mode and the height of shaft impact on the fire, mainly considering the parameters of fire sources, air velocity, height of shaft and the fire position, the paper presents the rule of temperature, pressure and smoke distribution in the tunnel, in the short channel and in the shaft. In the comprehensive study of human fleeting in fire, fireman putting out a fire, protection shaft aerator, reduce of tunnel lining destroy etc. air velocity is unsuitable to be greater than 6m/s. The paper summarizes the principle of organize ventilation on fire, the advices to scheme of ventilation and exhaust smoke organization when the fire occure in vary section are on fire are given in the end.