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A platform for research: civil engineering, architecture and urbanism
Experimental study on temperature distribution and smoke control in emergency rescue stations of a slope railway tunnel with semi-transverse ventilation
Highlights A 1:10 model tunnel with a slope was carried out to study the fire characteristic. Temperature and smoke distribution was studied with different ventilation modes. Results of semi-transverse ventilation were compared with longitudinal ventilation. Ventilation for semi-transverse ventilation rescue station with slope was proposed.
Abstract Installing a rescue station in an extra-long railway tunnel is an important measure to reduce the loss from tunnel fires. After a fire breaks out in the tunnel, the temperature distribution and smoke control in the rescue station are two important factors for disaster prevention and rescue. In this paper, a series of 1:10 small-scale model experiments were carried out to study the effects of transverse passage opening state, longitudinal velocity, smoke exhaust rate and fire source location on temperature distribution and smoke control in a rescue station with slope. The experimental results show that when the transverse passage is closed, the smoke spreading distance in the downhill direction is 6–18 m and that in the uphill direction is within 7 m of “Location A”. When the fire source is located in “Location A”, the longitudinal velocity V2 will not be less than 0.5 m/s. If the velocity on both sides of the tunnel is more than 0.50 m/s and the smoke exhaust rate is 1.712 m3/s, the smoke will not enter the parallel passage from different fire source locations. The maximum temperature of semi-transverse ventilation is 49.60% lower than that of longitudinal ventilation. Based on the temperature and smoke distribution, ventilation schemes before and after the opening of the transverse passage are proposed.
Experimental study on temperature distribution and smoke control in emergency rescue stations of a slope railway tunnel with semi-transverse ventilation
Highlights A 1:10 model tunnel with a slope was carried out to study the fire characteristic. Temperature and smoke distribution was studied with different ventilation modes. Results of semi-transverse ventilation were compared with longitudinal ventilation. Ventilation for semi-transverse ventilation rescue station with slope was proposed.
Abstract Installing a rescue station in an extra-long railway tunnel is an important measure to reduce the loss from tunnel fires. After a fire breaks out in the tunnel, the temperature distribution and smoke control in the rescue station are two important factors for disaster prevention and rescue. In this paper, a series of 1:10 small-scale model experiments were carried out to study the effects of transverse passage opening state, longitudinal velocity, smoke exhaust rate and fire source location on temperature distribution and smoke control in a rescue station with slope. The experimental results show that when the transverse passage is closed, the smoke spreading distance in the downhill direction is 6–18 m and that in the uphill direction is within 7 m of “Location A”. When the fire source is located in “Location A”, the longitudinal velocity V2 will not be less than 0.5 m/s. If the velocity on both sides of the tunnel is more than 0.50 m/s and the smoke exhaust rate is 1.712 m3/s, the smoke will not enter the parallel passage from different fire source locations. The maximum temperature of semi-transverse ventilation is 49.60% lower than that of longitudinal ventilation. Based on the temperature and smoke distribution, ventilation schemes before and after the opening of the transverse passage are proposed.
Experimental study on temperature distribution and smoke control in emergency rescue stations of a slope railway tunnel with semi-transverse ventilation
Tao, Liangliang (author) / Zhang, Yimin (author) / Hou, Kaixiang (author) / Bai, Yun (author) / Zeng, Yanhua (author) / Fang, Yong (author)
2020-08-31
Article (Journal)
Electronic Resource
English